Question

When a current carrying coil is moved away from a stationary coil, the direction of induced current in the stationary coil is

• A. Same as that in the moving coil
• B. Opposite to that in the moving coil
• C. Practically zero
• D. Nothing can be decided.

Answer 1

The correct option is A

Same as that in the moving coil

Explanation of correct option:

1. According to Lenz’s law, the induced current should be in a direction such that it opposes the change in magnetic field through the wire.
2. Using Lenz’s law, the induced current should be in the direction such that it opposes the induced current due to the moving coil.
3. Since the coil is moved away from the other, its magnetic field through the stationary loop decreases.
4. To maintain the same magnetic field it induces a current in the same direction as of moving coil.

Thus, the direction of induced current in the stationary coil is the same as that in the moving coil.

Hence, the correct option is (A).