Magnetic field due to currentHard
Question
Two concentric coils of 10 turns each are situated in the same plane. The radii are 20 cm and 40 cm and they carry respectively 0.2 and 0.3 ampere current in opposite directions. The magnetic field at the centre is :-
Options
A.
μ0
μ0B.
C.
μ0
μ0D.
μ0
μ0
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