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(a) Show that (ignoring edge effects) the self-inductance, L , of a solenoid with n turns per unit length, length l and cross-sectional area A, is given by L = n0n^2Al (b) A solenoid with 100 turns, length 10 cm and of radius 1 cm, carries a current of 5A. Calculate the magnetic energy stored in the solenoid. (c) The current in the solenoid of part (b) is reduced to zero at a uniform rate over 5 s. Calculate the emf induced in the coil. |
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