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Question

Field at the centre of a circular coil of radius r, through which a current I flows is


A
directly proportional to r
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B
inversely proportional to I
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C
directly proportional to I
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D
 Directly proportional to I2
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Solution

The correct option is C directly proportional to I
Field at the centre of a circular coil of radius ris B=μoI2r

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