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Question

Automobile engines work on the principle of:


Your Answer
A
thermal expansion of solids
Your Answer
B
thermal expansion of liquids
Correct Answer
C
thermal expansion of gases
Your Answer
D
anomalous expansion

Solution

The correct option is D thermal expansion of gases
Thermal expansion involves change in volume of an object when it is heated. The combustion of fuel in an automobile engine produces gas at high pressure. That pressurized gas is expanded in a chamber to drive a piston which in turn rotates the crank. Thus automobile engines work on the principle of thermal expansion of gas.

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