Two concentric coils each of radius equal to `2pi` cm are placed at right angles to each other. 3 Amp and 4 Amp are the currents flowing in each coil respectively. The magnetic field intensity at the centre of the coils will be ........................ Tesla.
Options:
(a) `5xx 10^(-5)`
(b) `7 xx 10^(-5)`
(c) `12xx 10^(-5)`
(d) `10^(-5)`