Identify the incorrect statement(s) from the following in the context of an electric current flowing through a conductor.

(A) The electrons suffer collisions with heavy fixed ions in the conductor
(B) The resistance of the given conductor depends on its temperature
(C) Resistance and resistivity both depend on the dimensions of the conductor
(D) When a potential difference V is applied across the conductor then V = IR

Choose the correct answer from the options given below:

(C) only

The correct answer is Option (3) → (C) only

Explanation:

(A) The electrons, while moving through the conductor, collide with fixed positive ions and lose energy. Hence, this statement is correct.

(B) The resistance of a conductor increases with an increase in temperature. Hence, this statement is correct.

(C) Resistance depends on the dimensions of the conductor (length and area), given by

$ R = \rho \frac{l}{A} $

(D) When a potential difference $ V $ is applied across a conductor, the current obeys Ohm’s law,

$ V = IR $

Incorrect statement: (C)