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Assertion : It is more difficult to push...

Assertion : It is more difficult to push a magnet into a coil with more loops.
Reason : Emf induced in the current loop resists the motion oif the magnet.

Text Solution

Verified by Experts

The correct Answer is:
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 turn opposes the motion of the magnet, when the number of turns is increases 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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Knowledge Check

  • Assertion: Magnetic field B (shown inwards) varies with time t as shown. At time to induced current in the loop is clockwise Reason : If rate of change of magnetic flux from a coil is constant, charge should flow in the coil at a constant rate.

    A
    If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
    B
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
    C
    If Assertion is true, but the Reason is false.
    D
    If Assertion is false but the Reason is true.

  • Assertion (A): If the number of turns of a coil is increased, it becomes more difficult to push a bar magnet towards the coil. Reason (R): The difficulty faced is according to Lenz's law.

    A
    Both A and R are true and R is the correct explanation of A
    B
    Both A and R are true but R is NOT the correct explanation of A
    C
    A is true but R is false
    D
    A is false and R is true

  • A circular loop is placed in magnetic field B=2t. Find the direction of induced current produced in the loop.

    A
    Clockwise
    B
    Anti clockwise
    C
    No induced current
    D
    random direction

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