Question
Physics Question on Faradays laws of induction
The variation of induced emf (e) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as
A
B
C
D
Answer
Explanation
Solution
Polarity of emf will be opposite in the two cases while entering and while leaving the coil. Only in option (b) polarity is changing. Hence, the correct option is (b).