Q3.1Multiple choice
Consider a current carrying wire (current I ) in the shape of a circle. Note that as the current progresses along the wire, the direction of j (current density) changes in an exact manner, while the current I remain unaffected. The agent that is essentially responsible for is
- (a)source of emf.
- (b)electric field produced by charges accumulated on the surface of wire.
- (c)the charges just behind a given segment of wire which push them just the right way by repulsion.
- (d)the charges ahead.