Answer to Question #178226 in Physics for Ichchhit Pratap

Question

(ii) When current is passed through a metal wire, in beginning the magnitude of current is large. Then, it gradually decreases and comes to a stable value less than the previous one. While the emf of battery remains constant. Explain with reason.

Answer 1

Opposite happens because the emergence of current causes the emergence of a magnetic field. This magnetic field opposes the change in current, so the current gradually slowly increases.