If the cross-section of a wire of fixed length is doubled, how does the resistance of that wire change? A. Halved. B. Doubled C. Unchanged. D. Quadrupled

Respuesta :

Answer:

The correct choice is

A. Halved.

Explanation:

The resistance of a wire is directly proportional to the length of the wire and inversely related to the area of cross-section of the wire. Hence as the area of cross-section of the fixed length of wire is doubled, the resistance of the wire will becomes half. So resistance becomes halved.