NEET Physics Question - Current Electricity

Assertion (A): The bending of an insulated wire increases the resistance of wire.

Reason (R): The drift velocity of electrons in bent wire decreases.

(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)

(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Resistance of a wire \( R = \rho \frac{L}{A} \) primarily depends on its resistivity \( rho \), length \( L \), and cross-sectional area \( A \). Bending an insulated wire does not significantly alter these properties, so its resistance does not increase. Drift velocity is not affected by bending either. Therefore, both (A) and (R) are false.

Rankers Physics

Bending Insulated Wire Resistance

Solution:

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