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The magnetic induction at the centre of ...

The magnetic induction at the centre of a solenoid is `B`. If the length of the solenoid is reduced to half and the same wire is would in two layers the new magnetic induction is

A

`B//2`

B

B

C

2B

D

4B

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The magnetic induction due to toroidal solenoid is independent of

    A
    permeability
    B
    current
    C
    radius of the toroidal solenoid
    D
    number of turns per unit length

  • When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of coil due to some current flowing is B_(1) If the same wire is turned into three loops to make a circular coil, the magnetic induction at the center of this coil for the same current will be

    A
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    B
    `9B_(1)`
    C
    `3B_(1)`
    D
    `27B_(1)`

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    `8 xx 10^(-6) Wb//m^(2)`
    B
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    C
    `9 xx 10^(-6) Wb//m`
    D
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