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When two compound generators are connected in parallel, when load current in generator 1 is increased __________

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When two compound generators are connected in parallel, when load current in generator 1 is increased __________

(a) Both generator will share same load

(b) Generator 1 will start running as motor

(c) Generator 2 will be overloaded

(d) Generator 2 will start running as motor

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Asked question is from Parallel Operation of DC Generator topic in chapter DC Generator of DC Machines

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Correct answer is (d) Generator 2 will start running as motor

The explanation is: If load current in G1 increases, load current in G2 decreases. Series excitation and internal voltage in G1 increases and for G2, these quantities decrease. Finally, all load shifts, which may turn to run G2 as a motor. All this leads to heavy overloading of G1.

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