engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Electromagnetic Theory Magnetostatics
The emf induced in a secondary coil is 20 kV, when the current breaks in the primary coil. The mutual inductance is 5 H and the current reaches to zero in 10-4 s in the primary. The maximum current in the primary before it breaks is
1
0.1 A
2
0.4 A
3
0.6 A
4
0.8 A