1.

Magnetic field at a point d distance away from long wire due to electric current i in it is ____________(a) µ0i/2r(b) µ0i/r(c) µ0i/2πr(d) µ0i/πr

Answer» The correct choice is (c) µ0i/2πr

The explanation: Magnetic field at distance d from long wire with carrying current i is given by-

B = µ0i/2πr.


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