railway RRB Technician Grade 1 Mock Test 2024 Electromagnetic Theory Maxwell's Equations Faraday's Law
A flux of 0.25 mWb is produced by a coil of 1000 turns wound on a ring with a current of 2 A in it. Calculate the e.m.f induced in the coil when a current of 10 A is switched off, assuming the current will fall to zero in 1 millisecond.
1
2500 V
2
25 V
3
1250 V
4
12.5 V