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

Answer

A

Explanation

(a) Resistance wire `R = rho (l)/(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 remain same.