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Magnetic field intensity H at the centre...

Magnetic field intensity H at the centre of a circular loop of radius r carrying current I e.m.u. is

A

`(r )/(I)` oersted

B

`(2pi)/(r )` oersted

C

`(I)/(2pi r)` oersted

D

`(2pi r)/(I)` oersted

Text Solution

Verified by Experts

The correct Answer is:
B
`H= (2pi NI)/(r )` oersted
Here N= 1 or `H= (2pi I)/(r )` oersted
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