11. Calculate the magnetic flux through a 290 turn, 8.69 mH coil when the current in the coil is 9 mA. Answer in units of Wb.12. A solenoid of radius 2.1 cm has 316 turns and a length of 22 cm. The permeability of a free space is 1.25664x10E-6 V·s/A·m.Find its inductance.Answer in units of mH.Find the rate at which current must change through it to produce an emf of 72 mV. Answer in units of A/s.14. Two solenoids of radii 3 cm and 8 cm arecoaxial. They are each 35 cm long and have250 turns and 1100 turns, respectively.The permeability of free space is 4(pie)x 10^-7 T · m/A.Find their mutual inductance. (Ignore theend effects)Answer in units of mH.
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