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

Options

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 and R is true.

Answer

A

Explanation

Resistance of wire R=`rho(l/A)`
Where `rho` is resistivity of material which does not depend on the geometry of wire. Since when wire is bent its, resistivity, length and area of vross-section do not change, therefore resistance of wire also remains same.