Physics-Resistance & Resistivity

NEET Physics Resistance & Resistivity Assertion Reason Question

Type: Assertion Reason-assertion-Medium-Class 12

Assertion (A): The resistance of a wire increases with an increase in its length. | Reason (R): Resistance is directly proportional to the length of the wire as per the formula R = ρlA\rho \frac{l}{A}.

A

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

B

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

C

A is true but R is false.

D

A is false.

Correct Answer

Option A

Detailed Explanation

The formula R = ρlA\rho \frac{l}{A} from the NCERT textbook shows resistance is proportional to length, explaining why resistance increases as length increases.

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