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प्रश्न
Give two uses of a bimetal strip.
उत्तर
Two applications of the bimetallic strip are thermostat in electric iron and in balance wheels.
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संबंधित प्रश्न
Telephone wires are kept tight between the two poles in winter.
Solids expand the least and gases expand the most on being heated.
Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature.
Distinguish between liquid and vapour (or gas) states of matter on the basis of the following factors
- Arrangement of molecules
- Inter-molecular separation
- Inter-molecular force, and
- Kinetic energy of molecules
What is evaporation? Explain it on the basis of molecular motion.
Two identical rods, one hollow and the other solid are heated to the same rise in temperature. Which will expand more?
The telephone wires break in winter.
Complete the following sentence:
In a bimetal two metals of different _______ of _______ are used.
______ exists when two objects In thermal contact no longer affect each other’s temperature.
The radius of a metal sphere at room temperature T is R and the coefficient of linear expansion of the metal is α. The sphere is heated a little by a temperature ΔT so that its new temperature is T + ΔT. The increase in the volume of the sphere is approximate.
