Question

7. A small loop lies outside a circuit. The key of the circuit
is closed and opened alternately. The closed loop will show

(a) Clockwise pulse followed by another clockwise
pulse
(b) Anticlockwise pulse followed by another
anticlockwise pulse
(c) Anticlockwise pulse followed by a clockwise pulse
(d) Clockwise pulse followed by an anticlockwise
pulse
​

Answer 1

answer : option (d) clockwise pulse followed by an anticlockwise pulse.

explanation : when the key is closed, current starts to flow through the circuit from higher potential to lower potential (i.e., increases from zero to certain value). so, induced current will be clockwise.

and when the key is opened, current starts to flows from lower potential to higher potential.(i.e, decreases from certain potential to zero value) so, induced current will be anticlockwise wise.

hence, clockwise pulse followed by an anticlockwise pulse.