Two concentric circular coils of ten turns each are situated in the same plane
Channel: Doubtnut
Date: 2020-01-19

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 `Wb//m^(3)` at the centre is