Question

Assertion (A): It is difficult to move a magnet into a coil of large number of turns when the circuit of the coil is closed. Reason (R): The direction of induced current in a coil with its circuit closed, due to motion of a magnet, is such that it opposes the cause.

• 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.

Hint:

Lenz's Law states that the direction of the induced current opposes the change in the magnetic flux, which is the reason why it's difficult to move a magnet into a coil.

Answer 1

The Correct Option is A

The assertion is true because it is indeed difficult to move a magnet into a coil with a large number of turns when the circuit is closed. This is due to the opposing force exerted by the induced current in the coil.
The reason is also true and correctly explains the assertion. According to Lenz's Law, the induced current in the coil will flow in such a direction as to oppose the motion of the magnet. This is why it becomes difficult to move the magnet into the coil, as the induced current opposes the change in magnetic flux.
Thus, the correct answer is (A): Both assertion and reason are true, and the reason is the correct explanation for the assertion.