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Net magnetic flux passing through any cl...

Net magnetic flux passing through any closed surface in a magnetic field is always ......

A

zero

B

infinity

C

definite

D

indefinite

Text Solution

Verified by Experts

The correct Answer is:
A
According to Gauss.s theorem,
`oint overset(to)(B).overset(to)(d) s =0`
`therefore oint"net" =0`
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Knowledge Check

  • Magnetic field lines ......

    A
    always intersect.
    B
    always form closed loops.
    C
    are more crowded away from the magnet.
    D
    can not pass through vacuum.

  • Intensity of magnetic field means ......

    A
    magnetic dipole moment per unit volume.
    B
    magnetic force per unit pole strength.
    C
    no. of magnetic field lines passing through unit area.
    D
    no. of magnetic field lines per unit volume.

  • Unit of magnetic flux is ......

    A
    `Tm^(2)`
    B
    `Wb`
    C
    `NmA^(-1)`
    D
    All of these

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    A circular coil with radius 10 cm and 10 no. of tightly wound identical turns is kept perpendicular to uniform magnetic field 2 xx 10^(-4) G intensity. Now, it is rotated with angular velocity 2pi "rad s"^(-1) about an axis passing through it but perpendicular to magnetic field. Then, at ........s, least time magnetic flux passing through it becomes half of maximum magnetic flux.

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