question_answer

Near a circular Loop of conducting wire as shown in the figure, an electron moves along a straight line. The direction of the induced current if any   in the loop is:              

A) variable

B) clockwise

C) anticlockwise                 

D) zero

Correct Answer: A

Solution :

(a) variable When an electron is moving from right to left, the flux linked with loop (which is going into the page) will first increase and then decrease as the electron passes by. So the induced current \[{{l}_{1}}\] in the loop will be first clockwise and will change direction (i.e., will become anticlockwise) as the electron passes by.