Question

A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far away is ______.

Options

• same as the earlier value

• one half of the earlier value

• twice the earlier value

• one quarter of the earlier value

Answer 1

A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of 1 mm diameter carrying the same current. The strength of the magnetic field far away is same as the earlier value.

Explanation:

There is no effect of diameter of the current-carrying wire on the magnetic field produced by it.