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(A) : The magnetic field at the ends of ...

(A) : The magnetic field at the ends of a very long current carrying solenoid is half of that at the centre.
(R) : If the solenoid is sufficiently long, the field within it is uniform.

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

'A' is true and 'R' is false

D

'A' is false and 'R' is false

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Ratio of magnetic field at the centre af a current carrying coil of radius R and at a distance of 3 R on its axis from the centre is ,

    A
    `10 sqrt 10`
    B
    `20 sqrt 10`
    C
    `2 sqrt 10`
    D
    `sqrt 10`

  • The ratio of magnetic field at the centre of a circular current carrying coil to its magnetic moment is 'x'. If the current in the wire is doubled, the ratio will become (radius is constant)

    A
    2x
    B
    x/2
    C
    x
    D
    x/8

  • The ratio of magnetic field at the centre of a circular current carrying coil to its magnetic moment is 'x'. If the current in the wire is doubled, the ratio will become (radius is constant)

    A
    2x
    B
    `x/2`
    C
    `x`
    D
    `x/8`

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