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Complex AC MCQs

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Question 199easy

The algebraic sum of instantaneous phase voltages in a three-phase circuit is equal to

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Question 200easy

A 3-phase load is balanced if all the three phase have the same

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Question 201easy

1n Fig. 5.24, line currents are behind the respective phase currents.

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Question 202easy

If one line conductor of a 3-phase line is cut, the load is then supplied by voltage.

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Question 203easy

The power factor of the load shown in is star-connected

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Question 204easy

In the circuit shown in Fig. 5.26, the phase sequence is RYB. If the load p.f. is cos q) lagging, then reading of wattmeter W2 will be

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Question 205easy

In two wattmeter method, the algebraic sum of the readings of two wattmeters will indicate true power only if

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Question 206easy

The most difficult unbalanced 3-phase load to deal with is

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Question 207easy

In a three-phase circuit, the total instantaneous power is equal to instantanelous power per phase multiplied by

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