An air-filled solenoid has 360 turns of wire, a length of 20.0cm, and a cross- sectional area of 5.00cm^2. a) if the current is 5.00a, calculate the magnetic field in the solenoid. b) calculate the self-inductance of the solenoid. c) if current increases at a rate of 50a per second what is the electromotive force across this solenoid?
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