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The ratio of the magnetic field at the c...

The ratio of the magnetic field at the centre of a current carrying circular coil to its magnetic moment is x. If the current and radius both are doubled the new ratio will become

A

2x

B

4x

C

x/4

D

x/8

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • The ratio of magnetic field at the centre of a current carrying circular coil to its magnetic moment is x. If the current and the radius both be doubled, the value of this ratio would be

    A
    2x
    B
    4x
    C
    `(x)/(4)`
    D
    `(x)/(8)`

  • The magnetic field at the centre of current carrying coil is

    A
    `(mu_(0)ni)/(2r)`
    B
    `(mu_(0))/(2pi)(ni)/r`
    C
    `(mu_(0)ni)/(4r)`
    D
    `mu_(0)ni`

  • The ratio of the magnetic field at the centre of a current-carrying circular coil to its magnetic moment is x. If the current and radius each of them are made three times, the new ratio will become

    A
    3x
    B
    9x
    C
    `x/9`
    D
    `x/27`

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    The magnetic field near the centre of a current carrying coil is uniform and ________

    The ratio of magnetic field and magnetic moment at the centre of a current carrying circular loop is x. When both the current and radius is doubled the ratio will be

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