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A Helmholtz coil has a pair of loops, ea...

A Helmholtz coil has a pair of loops, each withN turns and radius R. They are placed coaxially at distance R and the same current I flows through the loops in the same direction. The magnitude of magnetic field at P, midway between the centres A and C, is given by [Refer to figure given below]:

A

`(4Nmu_(0)I)/(5^(1//2)R)`

B

`(4Nmu_(0)I)/(5^(3//2)R)`

C

`(8Nmu_(0)I)/(5^(3//2)R)`

D

`(8Nmu_(0)I)/(5^(1//2)R)`

Text Solution

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The correct Answer is:
C
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