A solenoid of 2000 turns is wound over a length of 0.3 m. The area aof cross section is
Channel: Doubtnut
Date: 16/08/2020

A solenoid of 2000 turns is wound over a length of 0.3 m. The area aof cross section is `1.3 xx 10^(-3) m^(2)`. Around its central seciton, a coil of 300 turns is closely wound. If an initial current of 2 A is reversed in 0.25 s, find the e.m.f induced in the coil .