MCQ
When a loop moves towards a stationary magnet with speed v, the induced emf in the loop is $E$. If the magnet also moves away from the loop with the same speed, then the emf induced in the loop is.
- A$E$
- B$2E$
- C$\frac{\text{E}}{2}$
- ✓zero
✓
Answer
Correct option: D.
zero
Faraday's Law states that an electric field is induced by changing magnetic flux.
If both move with the same velocity in the same direction, the relative velocity is zero, hence there is no change of magnetic flux across the loop with time.
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