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When two coaxial coils carrying the same current in the same direction are brought towards each other, the current in both coils:

1. increases
2. decreases
3. first increases and then decreases
4. remains same

Correct answer: decreases

Solution

As the coils come closer, mutual inductance increases and the flux linked with each coil increases. By Lenz’s law, the induced current opposes this increase, so the net current in each coil decreases.

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