Two similar coils of radius R and number of turns N are lying concentrically with their planes at an angle `60^@` to each other. The currents flowing in them are I and 2I respectively. The resultant magnetic induction at the centre will be

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are I and 2 I, respectively. The resultant magnetic field induction at the centre will be

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing on them are I and 2I, respectively. The resultant magnetic field induction at the centre will be:

Two similar coils of radius R are lying concentriclaly with their planes at right angels to each other. The currents flowing in them are I and 2I respectively. The resulant magntic field induction at the centre will be

Two similar coils of radius R are lying concentriclaly with their planes at right angels to each other. The currents flowing in them are I and 2I respectively. The resulant magntic field induction at the centre will be

Two similar coils each of radius r and no. of turns n are lying concentrically with their planes at right angle to each other. The currents folowing in them are 1 A and sqrt3A respectively. What is the magnetic field at centre of the coils ?