State Faraday’s and Lenz’s laws of Electromagnetic Induction. A 4-pole, 250V motor has its armature removed in order to test the continuity of the field windings which are connected in series and consist of 2000 turns each. What is the average e.m.f induced when the current is switched off, if the flux falls from 0.026Wb to 0.001Wb in 0.2s?

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