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What is different about the two kinds of metal on the bimetallic strip of a thermostat coil?
the two dissimillar metals have different heat coefficient.on the application of heat the two mtels which are comonly bonded in shape of spiral or helix expands unevenly.that's results in diferential expansion that's unwind the expansion this differential expansion is sensed by the pointer and the differentail exapansion of the metal is shown in terms of pointer deflection on the scale as measured value.............
the two dissimillar metals have different heat coefficient.on the application of heat the two mtels which are comonly bonded in shape of spiral or helix expands unevenly.that's results in diferential expansion that's unwind the expansion this differential expansion is sensed by the pointer and the differentail exapansion of the metal is shown in terms of pointer deflection on the scale as measured value.............
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What does the bimetallic strip in an electric iron do?
It is used as a thermostat.A thermostat is a device used to control the temperature of any equipment, in this case an electric iron.Two little strips of different types of metals are welded or brazed together. These little strips will be mounted inside the the iron near to the hot plate, held down just at one side.An electrical contact will join the bimetallic strip into the electrical circuit of the iron. Another little flat metal plate will be mounted near the free end of the bimetallic strip. This little fixed plate will touch the free end of the bimetallic strip.So now you turn the iron on. The irons' hot plate heats up. The bimetallic plate heats up too as it is close to the hot plate.Ok, now is the clever bit someone once thought out. The two strips of metal heat up and expand. As the properties of the metals are different they will expand at different amounts. As the two strips are stuck together the bimetallic strip will bend.When it bends it will eventually bend away from the fixed plate. Assuming its been installed with the bimetallic strip the right way around! because the strip will bend to the side which has the metal that expands less. When it no longer touches the plate the circuit will turn off. And hence the power is turned off to the iron.So how come that dial makes the iron hotter or less hot? When you are twisting the dial you are actually squeezing some tension into the bimetallic strip so that it will have to get hotter before it will bend away from the contact and hence break the circuit.Thats the idea!
What are the different kinds of saws?
There are several different kinds of saws that give you different cuts as well as are designed to handle certain materials. Different kinds of saws include table saws, power hand saws, band saws, miter saws, metal cutoff saws, and circular saws.
What is a thermostat?
Thermostats are used to measure temperature in a room or appliance (ex.furnace). Thermostat act as temperature regulators which can turn appliances on or off at a predetermined temperature. Thermostats use the contraction of solids to measure temperature. Thermostats contain a strip made of two metals (bimetallic strip) that expand or contract depending on whether they are heated or cooled. When the metal expands or contracts it bends. The amount that the metal bends depends on the temperature. The bending provides a measure of the temperature.== Answer == A thermostat is a device used to tell temperatures.orit's an electrical switch that responds to temperature.It is a devise that controls the temperature of an item or system.Maintains predetermined temperature of engine coolant.
Physical property of bimetallic thermometer?
Basically you have two different kinds of metal with different coefficents of expansion put together. As they expand it creates a curving effect because one is expanding more than the other. This drives the needle and gives the indication. http://en.wikipedia.org/wiki/Bi-metallic_strip
How could a bimetallic strip perform a practical task in life?
bimetal stip is next to the contacts it make your oven,iron and air conditions unit work that is when ever the contacts touch from how high you put it and it heat up and the iron and brass bends
What is the two metal pieces in a thermostat?
The two metal pieces in a thermostat are typically made of bimetallic strips. These strips have different coefficients of thermal expansion, causing them to bend in response to temperature changes. When the temperature reaches a certain point, the bimetallic strips cause the thermostat to switch on or off.
Does specific heat capacities have anything to do with different metals in a bimetallic strip used in a thermostat?
The principal thing is linear expansion rates as temperatures rise, different metals have different rates of expansion. In a bimetallic strip, one layer of one metal is fused onto one layer of another metal with a different linear expansion rate, when heated the strip will curve along its length due to the different expansion rates, the greater the temperature rise, the more the curvature, this movement is used to trip a switch.
Contains a piece of metal that bends when its hot?
A thermostat is the most common item containing a bimetallic strip.
What is the different about the two kinds of metal on the bimetallic strip of a thermostat coil?
When the two metals are heated or cooled through the same change in temperature, one of them expands or contracts more than the other one does. That's why, when they're glued back-to-back, the combined strip develops a curve in it when it's heated. It curves away from the one that expands more, and toward the one that expands less.
Why are bimetallic strips useful in thermostas?
Bimetallic strips are useful in thermostats because they bend when heated, allowing them to trigger switches or valves to control temperature. The differential thermal expansion of the two metals in the strip enables precise temperature sensing and regulation within a thermostat.
What contains a small piece of metal that bends when it gets hot?
A thermostat contains a small piece of metal called a bimetallic strip that bends when it gets hot, allowing it to regulate temperature by opening or closing a circuit.
What is helical bimetallic strip?
A helical bimetallic strip is two strips of metal with differing boiling points that have been fused together, spiraling upwards around a central object. When heat is applied to the bimetallic strip, the different chemical properties in each metal strip will cause them to expand, forcing the helical strip to expand upwards.
What is a bimetallic thermometer?
A bimetallic thermometer uses a bimetallic strip wrapped into a coil. This strip usually consists of either steel and copper or steel and brass. A bimetallic thermometer is a type of thermometer made with a couple metal strips. They have differing thermal expansions that are brazen together. Any distortion in this apparatus caused by variations in the temperature is used to measure the temperature.
How is a bimetallic strip used in a thermostat?
A bimetallic strip is used in a thermostat, by concealing it inside. When the temperature goes up, the bimetallic strip expands, and turns on the circuit for the AC/compressor ,to make the temperature cooler inside wherever the thermostat is.Two metal strips of differing thermal expansion are bonded together. Because the expansion is different the metals expand by different amounts. When heated the strip therefore has to bend, the one with the greater expansion on the outside of the curvature. As the strip bends it can either make or break a circuit contact depending on the configuration of the circuit, switching on of off the current. The reverse is true when the strip cools again.
When a bimetallic strip is heated it bends toward the metal with the thermal expansion?
When a bimetallic strip is heated, the metal with the higher coefficient of thermal expansion expands more than the other metal, causing the strip to bend towards that metal. This bending is due to the unequal expansion and contraction of the two metals when exposed to different temperatures.
How does bimetallic work in an electric iron?
A bimetallic strip is a strip made from 2 different metals. It is designed to bend one way if it is warm and the other way if it is cold. The hotter it gets, the more it bends. In any thermostat, the electrical contacts bend apart as the target temperature is reached. The only difference between a heating thermostat and a cooling thermostat is which side of the bimetallic strip faces the other contact. In a heating appliance, the thermostat knob turns a screw to add resistance to the motion of the contacts so they must get hotter to separate as the screw is tightened. So the tighter the screw is turned, the hotter the appliance is allowed to get before the contacts separate.
What are the function of Bimetallic thermometer?
A bimetallic thermometer has a coil of metal strips in it. The metal strips are made of two different materials that expand/contract at different rates. Because they're connected together at one end, when the metals warm up or cool down, the coil changes shape. You use a bimetallic thermometer when you want an electrical circuit to close due to a change of temperature.
