A long solenoid carries a current of 30 A. Another coil (of larger diameter than

Question

A long solenoid carries a current of 30 A. Another coil (of larger diameter than the solenoid) is coaxial with the center of the solenoid, as in the figure. Find the magnetic field in the solenoid. The outside coil has 100 turns and the inside solenoid has 7950 turns. The permeability of free space is 4pi times 10-7 T . m / A. Answer in units of T Find the magnetic flux Phi12 through the cross-sectional area of the large circular coil due to the 30 A current in the solenoid. Answer in units of T m2 Assume the current I2 in the solenoid is increasing linearly at a rate of dI2 / dt = alpha. where alpha = 5 A / s. What is the magnitude of the voltage epsilon 1 across the circular coil? Answer in units of V

Explanation / Answer

magnetic field of frst solenoid=Ni/l=3pie*10^-4

secong solenoid=119.2*10^-4

net=first -second=109.775*10^-4 T

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