List of top Physics Questions on Magnetic Field Due To A Current Element, Biot-Savart Law asked in UP CPMT

Two concentric circular coils of ten turns each are situated in the same plane. Their radii are $20\, cm$ and $40\, cm$ and they carry respectively $0.2\, A$ and $0.3\, A$ currents in opposite direction. The magnetic field in tesla at the centre is