electromagnetic-induction Question 13
Question: Q. 1. State Lenz’s law. Explain, by giving examples that Lenz’s law is a consequence of conservation of energy.
U] [Delhi Comptt I, II, III 2017]
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Solution:
Ans. Statement of Lenz’s Law
Explanation (with example)
[CBSE Marking Scheme 2017]
Detailed Answer :
Try yourself similar to Q. 4 of short Answer Type Questions-I
Explanation :
When the north pole of a bar magnet is pushed towards the close coil, the magnetic flux through coil increases and the currentis induced in the coil in such a direction that it opposes the increase in flux. This is possible when the induced current in the coil is in the anticlockwise direction. Opposite will happen when the north pole is moved away from the coil.
In either case, it is the work done against the force of magnetic repulsion/attraction that gets ‘converted’ into the induced emf.
