Given below are two statements :
Assertion (A): Alloys such as constantan and manganin are used in making standard resistance coils.
Reason (R) : Constantan and manganin have very small value of temperature coefficient of resistance.
choose the correct answer from the options given below.

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Both A and R are true but R is not the correct explanantion of A

Both A and R are true and R is the correct explanation of A

A is false but R is true

A is true but R is false

answer is A.

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Detailed Solution

Since they have low temperature coefficient of resistance, their resistance remains almost constant

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