Complex AC MCQs
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 127easy
The unit of frequency of an A.C. signal is
Question 128easy
Which of the following values of alternating voltage should an insulation absolutely withstand?
Question 129easy
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will
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Question 130easy
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will
Question 131easy
The relation between the apparent power, actual power and reactive power is given by
Question 132easy
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?
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Question 133easy
Which of the following equations is valid for a balanced load on a starts circuit with a neutral conductor in a four wire star circuit?
Question 134easy
The true power drawn by a balanced three-phase consumer for line voltage V and line current I is given by
Question 135easy
. An electric iron designed for 110 V A.C. supply was rated at 500 W. It was put across a 220 V supply. Assuming that at 110 V it supplied 500 W output, (i.e., no losses) at the new voltage it will supply