Two coaxial circular loops of radius `0.5 m` and `5 xx 10^(-2)m` are separated by a distance `0.5 m` and carry currents `2 A` and `1 A` respectively. The force between the loops due to mutual induction is

Options

A. `2.09 xx 10^(-8) N`
B. `1.06 xx 10^(-6)` N
C. `4.18 xx10^(-8) N`
D. `8.3 xx 10^(-5) N`

Answer

A

Explanation

`F=(mu_0)/(4pi)(6M_1M_2)/(d^4)`
where `M_1=n_1i_1A_1,M_2=n_2i_2A_2`