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प्रश्न
An iron washer is heated. State the effect on its external.
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उत्तर
External diameter increases.
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संबंधित प्रश्न
What do you understand by thermal expansion of a substance?
State three factors on which depend the linear expansion of a metal rod on heating.
Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?
A metal plate is heated. State three factors on which the increase in its area will depend.
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. Explain the reason.
What is meant by thermal expansion?
Give reasons for the following:
Telephone wires sag in summer.
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.
