Question

How does the resistance of a conductor depend on:

(a) length of the conductor?
(b) area of cross-section of the conductor?
(c) temperature of the conductor?

Answer 1

1. The resistance of a conductor depends on its length. It is directly proportional to the length, R α l.
2. The resistance of a conductor is inversely proportional to its area of cross-section, i.e. R α 1 / A.
3. The resistance also depends on the temperature of the conductor. It increases on raising the temperature and decreases on lowering the temperature.