JEE Mains Model Paper 20

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Question : 59 of 90

Marks: +1, -0

Assertion(A) : Invar steel is used to prepare clock pendulum
Reason (R ) : The coefficient of linear expansion of invar steel is infinity.

A and R are correct and R is correct explanation for A
A and R are correct and R is not correct explanation for A
A is true and R is false
A is wrong and R is true

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