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"A bimetallic strip is made of two different metals stacked in a thin strip. Because different metals expand at different rates, one of the metals expands more than the other when the strip gets hot. This makes the strip coil and uncoil in response to changes in temperature=As the room temperature drops below the desired level, the bimetallic strip coils more tightly, and the glass tube tilts. A drop of Mercury closes an electric circuit that turns the heater on. As the room temperature rises above the desired level, the bimetallic strip uncoils slightly, becoming larger. The drop of mercury rolls back in the tube, opening the electric circuit and the heater turns off."==Quote from Holt, Rinehart, and Winston Physical Science Textbook=
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoBecause the two metals have different coefficient of linear expansion
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Which direction does a bimetallic strip bend when cooled?
It depends how it has been constructed
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.
When a bimetallic strip is heated it bends toward the metal with the thermal expansion?
... smaller ...
What is two strips of different metals welded together causing the strip to bend when heated?
That's a "bi-metal" or "bi-metallic" strip.
How does the bimetallic strip function when heated?
The Bi-metallic Strip works on simple thermal dynamics. 2 different metals are brazed together, and when heated or cooled, the metals expand or shrink at different rates, causing it to move in one direction or the other. they are used in thermostats in kettles and irons and have other useful applications too.
Why is a bimetallic strip curve when it is heated or cooled?
Because the two metals have different coefficient of linear expansion
What happens when bimetallic strip is heated?
The bimetallic strip bends.
What happens to bimetallic strip when it is heated and cooled?
The two metals have different expansion rates when the strip is heated. This means that one of the metals will expand more than the other, causing the strip to bend.
Does the bimetallic strip bend when heated?
yes
What happens to a hot bimetallic strip when it is cooled to room temperature?
It Melts:P.
Which direction does a bimetallic strip bend when cooled?
It depends how it has been constructed
How do you make a circuit using bimetallic strip?
The bimetallic strip is made of two different metals, bonded together. The two metals have different temperature expansion coefficients, so when the bonded assembly is heated or cooled, it curves one way or the other, allowing a switch to be opened or closed.
What changes takes place when bimetallic strip is heated?
actually what happen is that the strip is curved to the outside
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 bimetallic strip bend in curve instead of showing linear expansion on heating?
If one metal expands or contracts at a different rate than the other, and they are bonded together, as they are in a bimetallic strip, a curve is inevitable - it physically has to happen, if you think about it.
When a bimetallic strip is heated it bends toward the metal with the thermal expansion?
... smaller ...
What is the principel of bimetallic strip?
A bimetallic strip is made from two combined metal strips that have different rates of expansion when heated. This causes the strip to bend and so close or open an electrical contact switch.
