| Directions: In the following questions, a statement of Assertion [A] is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion [A]: It is more difficult to push a magnet into a coil with more loops. |
| Reason (R): emf induced in the current Loop resists the motion of the magnet. |
A) Both Assertion [A] and Reason (R) are true and Reason (R) is the correct explanation of Assertion [A]
B) Both Assertion [A] and Reason (R) are true but Reason (R) is not the correct explanation of Assertion [A]
C) Assertion [A] is true but Reason (R) is false
D) Assertion [A] is false and Reason (R) is also false
Correct Answer: A
Solution :
(a) According to Lenz's law, the emf induced in a current loop is such that it resists the motion of the magnet. As emf in each turns opposes the motion of the magnet, when the number of turns is increased the force opposing the motion also increases. Thus pushing a magnet into a coil with more number of loops is more difficult.
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