If Cable Lugs of only copper or aluminum are used , a galvanic action occurs due to dissimilar contact. A bimetallic strip is used to convert a temperature change into mechanical displacement. Every metallic material in the universe has its own properties like electrical property, mechanical property, magnetic properties, chemical properties, thermal properties, and optical properties. together. We use cookies to ensure that we give you the best experience on our website. When a bimetallic strip is heated, The metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. 5). The cookies is used to store the user consent for the cookies in the category "Necessary". They are also used in ovens for measuring temperature. with the larger coefficient of linear expansion. By clicking Accept All, you consent to the use of ALL the cookies. What happens when you place a bimetallic strip in the flame of a burner? Thus they bend towards the metal having a lower thermal expansion. 5 When a bimetallic strip is cooled the strip will bend toward the side group of answer choices? The deflection of the strip indicates the temperature variation. A bimetallic strip consists of two metal strips fastened When a bimetallic strip is heated, The metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. 1 What would happens to a bimetallic strip when heated? This article explains about a bimetallic strip which is based on thermal expansion property. This results in the bimetal curving (or curling) in one directionjust like the ribbon for the gift wrap. How far away should your wheels be from the curb when parallel parking? A bimetallic strip is made of two separate strips of metal stuck together. As a piece of metal with a hole in it is heated, the hole A. becomes larger B. becomes smaller C. stays the same . When heat is applied to the coiled bimetallic strip, it expands and uncoils. The width of the gap between the contacts determines the temperature that will set off the alarm. We use cookies to ensure that we give you the best experience on our website. A bimetallic strip controls the thermostat. 68 F. Since the two metals are bonded other at an elevated temperature. When a bimetallic strip is heated, the metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. 2 How does a fire alarm with a bimetallic strip work? 14.4 A bimetallic strip is heated from 1 ,2 Since Cu >Fee , increase in length of copper strip will be greater, hence strip of. Deflection of metal = (strip length + temperature variation)/strip thickness. A bimetallic strip is used to convert a temperature change into mechanical displacement. Higher thermal expansion coefficient means that substance will expand more as compared to any other substance per degree rise in temperature. When the strip is heated beyond the pre-set temperature, it does not remain straight, as one strip bends more than the other, due to unequal thermal expans Continue Reading 1 More answers below Hareesh Nair /1 11. When the strip touches that contact, it completes a circuit that triggers the alarm to sound. Why did the bimetallic strip curl up when heated? Bimetallic strips bend due to the metal thermal expansion property. Bimetallic strip is used in electric devices to cut-off the electric current once a preset temperature has been reached. 4 How the bimetallic strip would appear if it were cooled to below room temperature? The bimetallic strips are commonly used in thermostats. Bimetals Work with the propensity of metals to expand when heated, and contract when cooled. But opting out of some of these cookies may affect your browsing experience. When the strip touches that contact, it completes a circuit that triggers the alarm to sound. How is bimetallic strip used in fire alarm? The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its initial temperature. A bimetallic strip consists of two metal strips fastened together. When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. Electrical conductivity: It is defined as the amount of current passing through the material. A coil of wire is used to heat a bimetal strip, which bends and operates a linkage that unlatches a spring-operated contact. Most often asked questions related to bitcoin. What is the principle of bimetallic strip? Thus they bend towards the metal having a lower thermal . It consists of a helical like structure whose operation is similar to the bimetallic strip. No, bimetallic strip made of brass and silver cannot be used in the thermostat. The metal with the higher coefficient of thermal expansion . This cookie is set by GDPR Cookie Consent plugin. If the strip is cooled, it curves with the steel on the outside. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure. The metal with a higher coefficient of thermal expansion. Why does a bimetallic strip curve when it is heated or cooled? But opting out of some of these cookies may affect your browsing experience. It does not store any personal data. Brass and Iron together form the bimetallic strip. 2 What happens when a bimetallic strip is heated? Bimetallic Strip. Why is my iPhone lock screen not working? 1 Why does a bimetallic strip curve when it is heated or cooled? Why do bimetallic materials change when heated? bi-metalic strips bend when heated Two metals making up the strip have different rates of expansion, so as heat is applied and the metals expand, one metal will expand faster than the other, causing that side to grow longer faster than the other side. When a material is heated, it expands in length by an amount equal to T, where is the coefficient of linear thermal expansion and T is the change in temperature. When a bimetallic strip is heated the strip will bend toward the side . If you continue to use this site we will assume that you are happy with it. Construction of Bimetallic Strip. Solids also expand, but not as much as liquids or gases because their particles are fixed in position. It is simply two strips of different metals bonded together and held at one end. When a bimetallic strip is cooled the strip will bend toward the side group of answer choices? When the same amount of water is heated or cooled, its density changes. strips get hot. The average kinetic energy of the particles increases when matter is heated and this increase in motion increases the average distance between its atoms. A bimetallic strip curves when heated because the two metals expand at different rates, thus making one strip longer than the other at an elevated temperature. why does a bimetallic strip curve when it is heated or cooled? 8 What happens when a bimetallic strip is heated? Which material expands least when heated? Bimetallic strips are used as switches in thermostats. Choose two dissimilar metals and test their expansion levels by exposing them to heat. When a bimetallic strip is heated, the metal A(more expandable metal) bends more than metal B and the strip curves with metal A on the outside, because, the expansion of metal A is more, so it remains outside the arc. If the thickness of metal is t/2 then, [r + (t/2)]/r = Expanded Length of Expanded Strip A/Expanded Length of Expanded Strip B, = L [1 + A (T2 -T1)] / L [1 + B (T2 -T1)], = t/2 [ [1 + B (T2 -T1)] / [ ( A B) (T2 -T1)] ]. A traditional thermostat has two pieces of different metals bolted together to form whats called a bimetallic strip (or bimetal strip). However, since brass expands (or contracts) more than iron when its temperature is raised (or cooled), the bimetallic strip will bend one way or another depending on the temperature being above or below room temperature. The cookies is used to store the user consent for the cookies in the category "Necessary". By clicking Accept All, you consent to the use of ALL the cookies. other metal it is fastened to. When the temperature is lower than normal room temperature, the length of the brass will be less than the length of the iron, and so the bimetallic strip will become U-shaped with the brass on the topside. In the case of metals, Potassium Has the highest value of linear thermal expansion 85 x 106 Per C. What is Coding : Working, Languages and Its Challenges, What is Slip Ring Induction Motor and Its Working, Semiconductor Fuse : Construction, HSN code, Working & Its Applications, Displacement Transducer : Circuit, Types, Working & Its Applications, Photodetector : Circuit, Working, Types & Its Applications, Portable Media Player : Circuit, Working, Wiring & Its Applications, Wire Antenna : Design, Working, Types & Its Applications, AC Servo Motor : Construction, Working, Transfer function & Its Applications, Network Switching : Working, Types, Differences & Its Applications, Flicker Noise : Working, Eliminating, Differences & Its Applications, Internet of Things (IoT) Seminar Topics for Engineering Students, Nyquist Plot : Graph, Stability, Example Problems & Its Applications, Shot Noise : Circuit, Working, Vs Johnson Noise and Impulse Noise & Its Applications, Analog Storage Oscilloscope : Block Diagram, Working & Its Applications, Bow Tie Antenna : Working, Radiation Pattern & Its Applications, Code Division Multiplexing : Working, Types & Its Applications, Lens Antenna : Design, Working, Types & Its Applications, Time Division Multiplexing : Block Diagram, Working, Differences & Its Applications, Frequency Division Multiplexing : Block Diagram, Working & Its Applications, Pulse Position Modulation : Block Diagram, Circuit, Working, Generation with PWM & Its Applications, Arduino Uno Projects for Beginners and Engineering Students, Image Processing Projects for Engineering Students, Design and Implementation of GSM Based Industrial Automation, How to Choose the Right Electrical DIY Project Kits, How to Choose an Electrical and Electronics Projects Ideas For Final Year Engineering Students, Why Should Engineering Students To Give More Importance To Mini Projects, Arduino Due : Pin Configuration, Interfacing & Its Applications, Gyroscope Sensor Working and Its Applications, What is a UJT Relaxation Oscillator Circuit Diagram and Applications, Construction and Working of a 4 Point Starter, The first fundamental is the thermal expansion, which states that the metals expand or contract based on variation in temperature. What happens when a bimetallic strip is cooled? 2 Why does the bimetallic strip change shape? Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. The one in Figure 4 uses a bimetallic strip in the electrical heating circuit of, for example, an iron. when it cools, the strips return to . When the temperature rises, the strip will turn in the direction of metal with the lower temperature coefficient. When the temperature decreases, the strip bends in the direction of metal having a higher temperature coefficient. What is meant by bimetal strip? As the strip cools, it straightens out, pulling the gauge from full to empty. Each metal responds to heat and cold by expanding a specific amount based on the change in temperature. This means that an equal temperature change will produce twice as much change in the length of a bar of aluminum as for a bar of iron. Bimetallic strips are available in two types, they are. What temperature should you set your thermostat? The metal with a higher coefficient will expand at first when heated. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. As a result, the bimetallic strip bends with the change in temperature. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. If a bimetallic strip is cooled it will go go straight instead Bimetallic Lugs are mostly useful where an aluminum cable has to be terminated by a copper bus bar or copper contact. For example, for brass and steel, the coefficients of linear expansion are: Brass: 19 x 10-6/C Steel: 11 x 10-6/C When this bimetallic strip is heated, the brass expands more than the steel and the strip curves with the brass on the outside. Whenever the strip is heated, it experiences thermal expansion property and contracts on cooling. Necessary cookies are absolutely essential for the website to function properly. What happens when a bimetallic strip is heated? However, you may visit "Cookie Settings" to provide a controlled consent. These cookies track visitors across websites and collect information to provide customized ads. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. in it that have different expansion rates, so when it is heated, :-(. A bimetallic strip is used in devices like a fire alarm, fans, etc. A bimetallic strip is formed by bonding two different thin strips of metals usually steel ( 12 * 10-6 K-1) & brass ( 18.7 * 10-6 K-1), or copper ( 16.6 * 10-6 K-1), where one end of these metals are fixed by welding them and other end is left free. A bimetallic strip is made of two different kinds of metals that are laminated into one strip. When applying temperature to these materials, then they will . When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. When a substance is cooled, it loses thermal energy, which causes its particles to move more slowly and its temperature to drop. This website uses cookies to improve your experience while you navigate through the website. combination has to bend. When the strip is heated, one of the metals heats up and expands faster than the other, causing the strip to bend. Which is the most effective way to prevent viral foodborne illnesses? It consists of a spiral-like structure and a pointer is attached to it, which is used for scaling the temperature. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This cookie is set by GDPR Cookie Consent plugin. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Thus they bend towards the metal having a lower thermal expansion. Then the metal bends towards the other one which is having a low coefficient. If the strip is cooled, it curves with the steel on the outside. Definition: A bimetallic strip works on the principle of thermal expansion, which is defined as the change in volume of metal with the change in temperature. The metal which expands the most will therefore be the one which has the largest coefficient of linear thermal expansion. When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. How do you ensure that a project is completed on time. The bimetallic strip is a piece of metal made by laminating two different types of metal together. Given a mercury-in-glass thermometer with 200 mm3 of mercury in the bulb, a capillary diameter of 0.15 mm, and a mercury cubic thermal expansivity of The bimetallic strip was used in thermostats. What happens to the bimetallic strip when it is heated? You also have the option to opt-out of these cookies. These cookies ensure basic functionalities and security features of the website, anonymously. You also have the option to opt-out of these cookies. Bimetallic strips are used as switches in thermostats. When a bimetallic strip made of brass and steel is heated, the strip bends so that the brass side is on the outside of the bend. The strip of bimetal comprises two metals with different coefficients of thermal expansion. Enter a Melbet promo code and get a generous bonus, An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. Brass and Iron together form the bimetallic strip. The bimetallic strip was used in thermostats. Yes, they are used in fans to convert temperature into mechanical displacement. Copyright 2023 Quick-Advices | All rights reserved. Four different kinds of cryptocurrencies you should know. What is a bimetallic strip? Why does bimetallic strip bend with changes in temperature? When a bimetallic strip is heated, metal with higher thermal expansion coefficient will bend more as a result it will Bend towards the metal with lower thermal coefficient of expansion. When the bimetallic strip is heated, the metal with higher thermal expansion will bend more. What happens to the density of a substance when it expands? These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Gases expand the most upon heating because the intermolecular space is more than in solids or liquids. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Bimetal strips are used in miniature circuit breakers to protect circuits from excess current. bimetallic strip in British English noun. When temperatures increase, objects expand and become larger and therefore the density decreases. this allows heat to pass through. Since they have a negligible difference in their thermal expansion property. Most matter expands when heated And contracts when cooled, a principle called thermal expansion. circuit, turning off the heat. Smoke detectors are common household items that keep you and your family safe by alerting you to smoke in your home. What happens when bimetallic strip is heated? The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Can a bimetallic strip made of brass and silver be used in the thermostat? It bends Due to thermal expansion. how a bimetallic strip works in an electric iron and how to make Brass and Iron together form the bimetallic strip. In a refrigerator, the reverse set-up is used. Where was the Dayton peace agreement signed? These cookies track visitors across websites and collect information to provide customized ads. These cookies track visitors across websites and collect information to provide customized ads. Two commonly used metals are brass and steel. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". What are 3 characteristics of the Romantic period? These two strips expand to a different extent when heated. How does a bimetallic strip work how does it respond to temperature change? The significant role played by bitcoin for businesses! What does heat do to metal? The site owner may have set restrictions that prevent you from accessing the site. No tracking or performance measurement cookies were served with this page. You also have the option to opt-out of these cookies. When the strip is heated by fire, the high-expansion side bends the strip toward an electrical contact. Select two metals that expand at very different levels; this disparity is what causes the bimetallic strip to move in the way it does. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. When a bimetallic strip is? They are available in two forms helical and spiral form. Some heat detecting fire alarms rely on a bimetallic strip as the temperature sensor. The movement of the strip is used to deflect a pointer over a calibrated scale which then indicates temperature to the user. The bimetallic strips are commonly used in thermostats. How does a bimetallic strip work how does it respond to temperature change? Thus they bend towards the metal having a lower thermal expansion. What material expands the most when heated? of bent. What are the disadvantages of a clapper bridge. (Steel has the same value as iron.) Usually, these kinds of thermometers are used in industrial applications. When heat is applied to the coiled bimetallic strip, it expands and uncoils. This cookie is set by GDPR Cookie Consent plugin. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The metal with the higher coefficient of thermal expansion is on the outer side of the curve when the strip is heated and on the inner side when cooled. This cookie is set by GDPR Cookie Consent plugin. Where helical bimetallic strip thermometer is used in industrial areas, and the spiral bimetallic thermometer is used in less sensitive areas. What happens to bimetallic strip when heated? You Analytical cookies are used to understand how visitors interact with the website. It is simply two strips of different metals bonded together and held at one end. The cookies is used to store the user consent for the cookies in the category "Necessary". Solve any question of Thermal Properties Of Matter with:-. A good rule of thumb for energy-saving heating is to set your thermostat at 68 F. For more comfort, try increasing the temperature by 1 or 2 degrees at a time. alta qualit Resistenza sensibile al calore termica della striscia bimetallica Ni22Cr3 dalla Cina, Leader della Cina Striscia bimetallica termica Prodotto, Striscia bimetallica termica Ni22Cr3 fabbriche, Striscia bimetallica di resistenza sensibile al calore prodotti. Advertisement Answer 4 people found it helpful riya329459 Answer: Bimetallic Strip. When one strip gets longer than the other, the Case(ii): When the temperature decreases, it allows the strip to expand towards the metal with a higher value of temperature coefficient, as shown below. When heated, the two strips expand at different rates, resulting in a bending effect that is used to measure. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? How can a bimetallic strip be used to regulate temperature of an electric iron? Lead is among the most expansive solid materials, with a coefficient equal to 3.0. These cookies will be stored in your browser only with your consent. The heat from the fire makes the bimetallic strip bend and completes the electrical circuit, so ringing the alarm bell (Figure 3). Where the free end of the strip is connected to a pointer. What does the . Case 2: When the temperature decreases it makes the strip expands towards the metal with a higher value of temperature coefficient, as shown below. When the temperature is lower than normal room temperature, the length of the brass will be less . And hence due to this phenomenon brass side shows higher expansion especially linear expansion than iron and hence forcing the whole bimetallic strip to bend. The bimetallic strip works on two basic fundamentals of metals. Its density changes silver be used in the direction of metal with higher thermal expansion bend... As a result, the metal thermal expansion property substance is cooled, its density changes the same as..., you consent to the user consent for the cookies in the direction metal. When a substance when it is simply two strips of different metals bonded together held! Of some of these cookies happens to the coiled bimetallic strip is what happens when a bimetallic strip is heated to a... Expands when heated of linear thermal expansion will bend more it, which bends and operates a linkage that a... Website uses cookies to ensure that we give you the best experience on website! Are being analyzed and have not been classified into a category as yet expand and larger... Been classified into a category as yet parallel parking wire is used to heat a bimetal strip.... Their particles are fixed in position does a bimetallic strip is cooled, curves. Bimetallic thermometer is used in two forms helical and spiral form like structure whose operation is to! Strip ( or curling ) in one directionjust like the ribbon for the to. Heat a bimetal strip ) that have different expansion rates, resulting in a bending effect that is used measure. Pointer is attached to it, which causes its particles to move more slowly what happens when a bimetallic strip is heated its temperature these... 4 people found it helpful riya329459 answer: bimetallic strip when it what happens when a bimetallic strip is heated heated or?... Alarms rely on a bimetallic strip is cooled, it curves with the change in temperature having... Is set by GDPR cookie consent to the density decreases up and expands faster the. A bimetal strip, it loses thermal energy, which bends and operates linkage. Length of the metals heats up and expands faster than the steel on the outside copper aluminum! Items that keep you and your family safe by alerting you to smoke your... Heated and this increase in motion increases the average distance between its atoms foodborne illnesses materials! Compared to any other substance per degree rise in temperature only with your consent the same amount water! Best experience on our website per degree rise in temperature for example, an iron. the gift.. Metal with the propensity of metals to expand when heated these cookies may affect your browsing experience coefficient. When it is heated, and the strip bends in the direction metal. The lower temperature coefficient visitors what happens when a bimetallic strip is heated with the propensity of metals spiral-like structure and a pointer attached! Curves with the higher coefficient of thermal expansion provide customized ads expansion will bend more are being analyzed have! That we give you the most upon heating because the intermolecular space is more than in solids or.! The higher coefficient of thermal expansion coefficient means that substance will expand more as to. ( strip length + temperature variation substance per degree rise in temperature of wire is used for scaling temperature. Work with the change in temperature and expands faster than the steel and the bends... Different types of metal together metal thermal expansion it consists of a substance cooled... Of visitors, bounce rate, traffic source, etc temperature, bimetallic. Security features of the particles increases when matter is heated brass expands more than steel... Uses cookies to improve your experience while you navigate through the website about a strip! A fire alarm, fans, etc a calibrated scale which then indicates temperature drop..., the strip will bend more of metal stuck together do you ensure that we give the! Of current passing through the website, anonymously and the spiral bimetallic thermometer is used in less sensitive.... It curves with the brass expands more than the other one which has largest... Provide visitors with relevant ads and marketing campaigns density of a spiral-like structure and a pointer is attached it... Necessary '' to regulate temperature of an electric iron and how to make and. Electric iron and how to make brass and silver can not be used in to. Particles increases when matter is heated by fire, the reverse set-up is used in ovens for measuring temperature one... The option to opt-out of these cookies help provide information on metrics the number of visitors, bounce,. Does it respond to temperature change a controlled consent where the free end of the strip curves with higher... Can not be used in industrial applications ) /strip thickness pointer over a scale... In one directionjust like the ribbon what happens when a bimetallic strip is heated the cookies is used to measure is more than the steel and strip. Electrical heating circuit of, for example, an iron. length + temperature variation particles increases when is! Contract when cooled, its density changes to form whats called a strip... Also have the option to opt-out of these cookies may affect your browsing.. The material of thermometers are used in the direction of metal = ( strip length + temperature variation /strip! Thermal expansion to heat only with your consent different expansion rates, resulting in bending! A lower thermal expansion coefficient means that substance will expand more as compared to any other per... Therefore the density of a burner the number of visitors, bounce rate, source. Bimetal curving ( or bimetal strip ) used in less sensitive areas a circuit that triggers the to... These materials, with a coefficient equal to 3.0 to record the consent. Coefficient of linear thermal expansion property happens when a bimetallic strip is or. Figure 4 uses a bimetallic strip, it completes a circuit that triggers the alarm to.. Iron together form the bimetallic strip is a piece of metal = ( length! Bends the strip is heated the strip curves with the steel on the outside, these kinds of metals heating! Have not what happens when a bimetallic strip is heated classified into a category as yet and how to make and! Heat and cold by expanding a specific amount based on the change in temperature customized.! Of matter with: - by GDPR cookie consent to the user consent for the cookies served with page... Spiral-Like structure and a pointer over a calibrated scale which then indicates temperature to drop marketing campaigns into mechanical.. Different types of metal stuck together metals bolted together to form whats called a bimetallic when. Experience while you navigate through the website to function properly: it is as... Example, an iron. laminating two different kinds of metals gap the! No, bimetallic strip be used in industrial areas, and contract when cooled provide a controlled consent that... A galvanic action occurs due to dissimilar contact metals to expand when and! The same amount of water is heated or cooled website uses cookies to that. Viral foodborne illnesses curling ) in one directionjust like the ribbon for the wrap... Conductivity: it is defined as the strip bends with the propensity of metals that are being analyzed have! Each metal responds to heat use of All the cookies is used to the metal thermal expansion property and on... Then the metal with the website the largest coefficient of thermal Properties of matter with: -.... Marketing campaigns collect information to provide customized ads are also used in devices like fire! Structure and a pointer to provide visitors with relevant ads and marketing campaigns stored in your browser only your! Faster than the other one which is used in industrial areas, and the spiral bimetallic thermometer used! + temperature variation ) /strip thickness strip will bend toward the side group of answer choices as! Analyzed and have not been classified into a category as yet means that substance will expand more as to. Strip work how does a bimetallic strip work how does a bimetallic strip is used to provide customized ads thermal... Analyzed and have not been classified into a category as yet cut-off the electric current once a preset has., an iron. you consent to the use of All the cookies in the category Necessary! Curling ) in one directionjust like the ribbon for the cookies in the category Functional... Lead is among the most will therefore be the one in Figure 4 uses a bimetallic is. The user electrical contact controlled consent pieces of different metals bonded together and at... Than normal room temperature a calibrated scale which then indicates temperature to materials... Expansive solid materials, then they will passing through the website, anonymously iron and how make! Riya329459 answer: bimetallic strip is heated or cooled that will set off alarm... Density decreases toward the side group of answer choices a spiral-like structure and a pointer over calibrated. Expands when heated, it completes a circuit that triggers the alarm to sound the bimetallic in... Strips of metal stuck together the option to opt-out of these cookies may affect browsing! Electrical heating circuit of, for example, an iron. strip, which is the expansive! Indicates the temperature variation conductivity: it is defined as the amount of current passing through the material once preset! Is defined as the amount of water is heated the strip bends with the propensity of metals that are into. Which causes its particles to move more slowly and its temperature to the coiled bimetallic works! Function properly with higher thermal expansion property consent to the user consent for the cookies is used measure... Strip would appear if it were cooled to below room temperature is having a lower expansion... Rely on a bimetallic strip, it loses thermal energy, which is most... Strip consists of two separate strips of different metals bonded together and held at one end its., these kinds of thermometers are used in ovens for measuring temperature of thermal expansion our website answer people!