Two coils are at fixed locations. When coil 1 has no current andthe current in coil 2 increases at the rate 15.4 A/s, the emf incoil 1 is 27.0 mV. (a) What is their mutualinductance (in mH)? (b) When coil 2 has no currentand coil 1 has a current of 6.80 A, what is the flux linkage incoil 2?