Categories > Moving Charges and Magnetism > Biot-Savart's Law > Two concentric circular coils of ten turns each are situated in the same plane. Their radii are $20$ and $40 cm$ and they carry respectively $0.2$ and $0.3 ampere$ current in opposite direction. The magnetic field in $weber/{m^2}$ at the centre is

Moving Charges and Magnetism

Question: Two concentric circular coils of ten turns each are situated in the same plane. Their radii are $20$ and $40 cm$ and they carry respectively $0.2$ and $0.3 ampere$ current in opposite direction. The magnetic field in $weber/{m^2}$ at the centre is


1) $\frac{{35}}{4}{\mu _0}$
2) $\frac{{{\mu _0}}}{{80}}$
3) $\frac{7}{{80}}{\mu _0}$
4) $\frac{5}{4}{\mu _0}$
Solution: Explanation: No Explanation
Biot-Savart's Law Amperes Law

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