Two concentric coils each of radius equal to $2 \pi$ cm are placed at right angles to each other. 3A and 4A are the currents flowing in each coil respectively. The magnetic induction in $Wb/m^2$ at the centre of the coils will be : <br> ($\mu_0 = 4 \pi \times 10^{-7} \; Wb/Am$)
