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 28easy
A coil is supplied with 200 V and takes a current of 2A at 45? lagging. The Q of the coil is
Question 29easy
In a circuit element, the p.d. is higher than the applied voltage of the source. That will be
Question 30easy
A lamp consumes 25% of peak power in an a.c. circuit. What is the phase difference between the applied voltage and circuit current?
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Question 32easy
In an a.c. circuit, V and I are given y; V= 100 sin (100 t) volts I = 100 sin (100 t +71/3) mA The power dissipated in the circuit is
Question 33easy
An a.c. source is in series with R and L. If the respective potential drops are 200 V and 150 V, the applied voltage is
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Question 34easy
When 100 V d.c. is applied aross a solenoid, a current of IA flows in it. When 100 V a.c. is applied across it, the current drops to 0.5 A. If the frequency of a.c. is 50 Hz, the impedance and inductance of solenoid are
Question 35easy
In an R-L-C series circuit, the current through resistance and inductance has a phase difference of
Question 36easy
A coil when connected to an a.c. supply of 200 V, 50 Hz takes 2 A. The power consumed is 200 W. The circuit power factor is