JEE MAIN - Physics (2021 - 25th February Morning Shift - No. 10)
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : When a rod lying freely is heated, no thermal stress is developed in it.
Reason R : On heating, the length of the rod increases.
In the light of the above statements, choose the correct answer from the options given below :
Assertion A : When a rod lying freely is heated, no thermal stress is developed in it.
Reason R : On heating, the length of the rod increases.
In the light of the above statements, choose the correct answer from the options given below :
A is true but R is false
A is false but R is true
Both A and B are true but R is NOT the correct explanation of A
Both A and R are true and R is the correct explanation of A
Explanation
When a rod is free and it is heated then there is no thermal stress produced in it.
The rod will expand due to increase in temperature.
So both A & R are true.
The rod will expand due to increase in temperature.
So both A & R are true.
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