question_answer

The self-induced emf of a coil is 25 volts. When the current in it is changed at uniform rate from 10 A to 25 A in 1s, the change in the energy of the inductance is-                                     [JEE Main 10-Jan-2019 Evening]

A) 740 J

B) 637.5 J

C) 540 J

D) 437.5 J

Correct Answer: D

Solution :

[d] Induced emf

Change in energy of inductor

= 437.5 Joule