Two concentric circular coils of 10 turns each are situated in the same plane. Their radii are 25 cm

Question

Two concentric circular coils of 10 turns each are situated in the same plane. Their radii are 25 cm and 45 cm respectively and they carry 0.5 A and 0.9 A current in opposite direction. The magnetic field at the center is\

Professor PC Thomas Classes · Answer

$\mathrm{B}=\frac{\mu_{0} \mathrm{~N}}{2}\left[\frac{\mathrm{I}_{1}}{\mathrm{r}_{1}}-\frac{\mathrm{I}_{2}}{\mathrm{r}_{2}}ight]$\