Question: The variation of induced emf ( $\mathcal { \varepsilon }$ ) with time (t) in a coil if a short bar...

Question

The variation of induced emf ( $\mathcal { \varepsilon }$ ) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as

Answer 1

Solution

The polarity of emf will be opposite in the two cases while the magnet enters the coil and while the magnetic leaves the coil. Only in option (2) polarity is changing.

Question: The variation of induced emf ( \(\mathcal { \varepsilon }\) ) with time (t) in a coil if a short bar...

Solution