There are two coils A and B seperated by some distance. If a current of 2 A flows through A, a magnetic flux of `10^(-2)` Wb passes through B (no current through B). If no current passes through A and a current 1 A passes through B, what is the flux through A?

Explanation

Applying the mutual inductance of coil A with respect to coil B `M_21=(N_2phi_2)/(I_1)`
Therefore, we have
mutual inductance `=(10^(-2))/(2)=5mH`
Again applying this formula for other case
`N_1phi_1=M_12I_2=5mHxx1A=5mWb`.