A 1m2 circular coil of 10 loops is placed parallel to changing magnetic field at 0.3 T/s, the induced emf is:
Correct answer: C. Zero
- A. 0.5V
- B. 3V
- C. Zero
- D. 3.5V
Explanation
When loop is placed parallel to changing magnetic field, then the angle between magnetic field and vector area is 90o. If there is a coil of N loops instead of a single loop, then the induced emf will become N time, i.e. E= -N D φ/D t (Faraday's law of electromagnetic induction) E= 10 x D B.Acos90 /D t =10 x 0 /D t =0 V
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