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Following is square shape loop, whose on...

Following is square shape loop, whose one arm BC produces magnetic field B at the centre of coil. The resultant magnetic field due to all the arms will be :-

A

4B

B

`B//2`

C

B

D

2B

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Magnetic field at the centre of a circular loop of area

    A
    `(BA^(2))/(mu_(0)pi)`
    B
    `(BAsqrtA)/(mu_(0)`
    C
    `(BAsqrtA)/(mu_(0)pi`
    D
    `(2BAsqrtA)/(mu_(0)sqrtpi`

  • The magnetic field at the centre of square of side a is

    A
    `(sqrt(2)mu_(0))/(pia)`
    B
    `(sqrt(2)mu_(0)I)/(3pia)`
    C
    `(2)/(3)(mu_(0)I)/(a)`
    D
    zero

  • 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`

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