Chapter 7, Problem 1RQ

To determine

Choose the correct option from the given choices that is not a source of magnetostatic fields.

Answer to Problem 1RQ

The correct option from the given choices is (c) An accelerated charge.

Explanation of Solution

Description:

Charge movement with the constant velocity produces a static magnetic or magnetostatic field. The constant current flow or direct current tends to generate a magnetostatic field. Such a current flow can occur due to magnetization current as in permanent magnets or conduction current generated in current-carrying wires or an electron beam current generated as in vacuum tubes.

Therefore, it is clear that Options (a), (b), (d), and (e) are the sources of magnetostatic fields.

An accelerated charge is a charge that is moving with acceleration, which produces time-varying magnetic fields and not a magnetostatic field.

Thus, the accelerated charge is not a source of magnetostatic fields. Therefore, Option (c) is correct and Options (a), (b), (d), and (e) are incorrect.

Conclusion:

Thus, the correct option from the given choices is (c) An accelerated charge.