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Complex AC MCQs

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Practice free Complex AC multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 216 questions — no login required.

Question 208easy

In the two-wattmeter method 013-phase power measurement, the load is resistive. The readings of the wattmeters are WI and W2. Then,

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Question 209easy

A wattmeter uses

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Question 210easy

What is the phase relationship between line currents in a delta system?

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Question 211easy

All a.c. equipment is rated in kVA because

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Question 212easy

When the p.f. is improved, lagging reactive power supplied to the load

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Question 213easy

If wattmeter is normally phased and it indicates reverse reading, the current and voltage are

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Question 214easy

A balanced A-connected load is converted to equivalent balanced Y load. Then

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Question 215easy

The line currents in a 3-phase, 4-wire system are 9 L ? 60?A, 15 L 40?A and 12 L 130?A. The neutral wire current is

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Question 216easy

If A = [_3] , then sin At is I

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