Two circular coils of radii 5.0 cm and 10 cm carry equal currents of 2.0 A. The coils have 50 and 100 turns respectively and are placed in such a way that their planes are perpendicular to each other, what would be the magnitude of the magnetic field B at the centre ?

Explanation

In this case magnetic fields due to C_1 and
C_2 at P be perpendicular to each other.
Then net
`B=sqrt((pixx10^(-3))^2 +((pixx106(-3)^2`
`=sqrt2 xx pixx10^(-3) T`
`=sqrt2pi mT`.