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A magnetic needls is kept in a non-unif...

A magnetic needls is kept in a non-unifrom magnetic field . It experinces

A

a force and a torque

B

a force but not a torque

C

a torque but not a force

D

neither a force nor a torque

Text Solution

Verified by Experts

The correct Answer is:
a
In non-uniform magnetic field, the needle will experience
both a force and a torque.
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Knowledge Check

  • Assertion: When a magnetic dipole is placed in a non-uniform magnetic field, only a torque acts on the dipole. Reason: Force would also acts on dipole if magnetic field were uniform.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is the correct explanation of assertion.
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false.

  • Assertion" When diamagnetic material is placed in a non-uniform magnetic Held, it tends to move from stronger to the weaker part of the magnetic field. Reason: Diamagnetic materials possess strong magnetism.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true and reason is not the correct explanation of assertion.
    C
    If assertion is ture but reason is false.
    D
    If both assertion and reason are false.

  • In a uniform magnetic field, the field lines are :

    A
    curved
    B
    parallel and equidistant straight lines
    C
    parallel, but non-equispaced straight lines
    D
    nothing can be said.
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