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1. What is the peak emf generated by rotating a 821-turn, 17 cm diameter coil in...

1. What is the peak emf generated by rotating a 821-turn, 17 cm diameter coil in the Earth’s 5.14×10−5 T magnetic field, given the plane of the coil is originally perpendicular to the Earth’s field and is rotated to be parallel to the field in 11.8 ms?

2. A large superconducting magnet has a 32.4 H inductance. If you want current through it to be adjustable with a 1.43 s characteristic time constant, what is the minimum resistance of system?

3. At what angular velocity in rpm will the peak voltage of a generator be 470 V, if its 376-turn, 8.77 cm diameter coil rotates in a 0.212 T field?

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