(i) In what direction does the induced current flow in the coil?

(ii) Name the law used to arrive at the conclusion in part (i).

(iii) How would the current in coil be altered if

(a) the coil has twice the number of turns,

(b) the coil was made to move three times fast?

Solution:

(i) When the coil is shifted in the direction of the magnet, current flows from A to B, generating the North pole.

(ii) The Lenz Law

(iii) (a) The number of turns is directly proportional to the current. As a result, the current is doubled.

(b) The current triples.