| Direction: Q.6 to Q.10 |
| Lenz's law states that the direction of induced current in a circuit is such that it opposes the change which produces it. Thus, if the magnetic flux linked with a closed circuit increases, the induced current flows in such a direction that a magnetic flux is created in the opposite direction of the original magnetic flux. If the magnetic flux linked with the closed circuit decreases, the induced current flows in such a direction so as to create a magnetic flux in the direction of the original flux. |
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| Read the above passage carefully and give the answer of the following questions: |
A) The 'induced emf is not in the direction opposing the change in magnetic flux so as to oppose the cause which produces it.
B) The relative motion between the coil and magnet produces change in magnetic flux.
C) emf is induced only if the magnet is moved towards coil.
D) emf is induced only if the coil is moved towards magnet.
Correct Answer: B
Solution :
(b) The relative motion between the coil and magnet produces change in magnetic flux. The relative motion between the coil and the magnet produces change in the magnetic flux in the coil. The induced emf is always in such a direction that it opposes the change in the flux.
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