railway RRB JE (CBT I + CBT II) Mock Test 2024 Network Theory Magnetic Coupling Circuits Mutual Inductance
Mutual inductance between two closely coupled coils is 2 H. Now, if the number of turns in one coil is reduced by 50 percent and those of the other coil is doubled then, new value of mutual inductance is:
1
2 H
2
8 H
3
1 H
4
4 H