Home
Class 12
PHYSICS
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.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NCERT FINGERTIPS|Exercise NCERT Exemplar|6 Videos

  • ELECTRIC CHARGES AND FIELDS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • ELECTROMAGNETIC WAVES

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

A cylindrical bar magnet is kept along the axis of coil. Will there be a current induced in the coil. Will there be a current induced in the coil if the magnet is rotaded about its axis ? Give reasons.

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.

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 metallic loop is placed in a nonuiform magnetic field. Will an emf be induced in the loop?

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

A current loop in a magnetic field

Asseration:Induced coil are made of copper. Reason:Induced current is more in wire having less resistance.

Assertion If a magnet is brought closer to a current carrying loop along its axis, then current always decreases in the loop. Reason Magnet is repelled by the loop.

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