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MHT CET Physics question

PhysicsElectromagnetic InductionMHT CET

A six pole generator with fixed field excitation developes an e.m.f. of 100 V when operating at 1500 r.p.m. At what speed must it rotate to develop 120 V? [AIIMS 2007]

Answer: (B)

Solution

With fixed field, , so r.p.m.; 1200 and 400

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Question ID VK-082006