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If a sudden short circuit occurs on a power system (considered as R-L series circuit), the current wave-form consists of
Decaying AC current
Decaying DC current
Let the alternator reactance be X and the power system resistance R. Which one of the following is correct ?
The decay in (1) is caused by the increase in X but in (2) is caused by R
The decay in (1) is caused by R but in (2) is caused by increase in X
The decay in both (1) and (2) is caused by R
The decay in both (1) and (2) is caused by the increase in X