Question

The resistance of a wire is not dependent on

Answer 1

Answer: D) current

Explanation:

Resistance is the opposing force to the motion of the charges which constitute current.

The resistance increases with increase in temperature and length of the wire but decreases with the diameter.

It does not depend on the current.

Resistance is given by:

$R =\frac{\rho l}{A}=\frac{4\rho l}{\pi d^2}$

where, ρ is the resistivity, l is the length of the wire, A is the area of cross-section and d is the diameter.

Other then these factors, the resistance increases with increase in temperature. This is because at higher temperature, the collision between electrons positive kernels increases which restricts the motion of electrons. This increases the resistance.

Answer 2

D). Current Hope this will help