Assertion : Bending a wire does not effect electrical resistance.
Reason : The resistance of wire is proportional to the resistivity of material.

Options

A. If both assertion and reason are ture and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If assertion and reason both are false.

Answer

A

Explanation

(a) Resistance wire `R = rho (1)/(A)` where `rho` is resistivity of material which does not depend on the geometry of wire. Since when wire is banded, resistivity, length and area of cross-section do not change, therefore resistance of wire also remains same.