Alternating Current -Multiple Choice Questions Quiz

Interactive MCQs on “Alternating Current”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: Question: What is Alternating Current (AC)?

(a) Electric current that flows in one direction only.
(b) Electric current that changes direction periodically.
(c) Electric current that flows through a capacitor.
(d) Electric current that is generated by a battery.

Question 2: Question: What is the frequency of an AC supply in a typical household electrical outlet?

(a) 60 Hz
(b) 50 Hz
(c) 120 Hz
(d) 100 Hz

Question 3: Question: In an AC circuit, what does the term 'amplitude' refer to?

(a) The number of cycles per second.
(b) The rate of change of current with time.
(c) The peak value of the current or voltage.
(d) The phase difference between current and voltage.

Question 4: Question: What is the standard unit for measuring the frequency of an AC supply?

(a) Volt (V)
(b) Ampere (A)
(c) Hertz (Hz)
(d) Watt (W)

Question 5: Question: Which device is commonly used to convert AC to DC in electronic devices?

(a) Resistor
(b) Capacitor
(c) Diode
(d) Inductor

Question 6: Question: What is the phase difference between current and voltage in a purely resistive AC circuit?

(a) 0 degrees
(b) 45 degrees
(c) 90 degrees
(d) 180 degrees

Question 7: Question: What is the phase difference between current and voltage in a purely inductive AC circuit?

(a) 0 degrees
(b) 45 degrees
(c) 90 degrees
(d) 180 degrees

Question 8: Question: What is the phase difference between current and voltage in a purely capacitive AC circuit?

(a) 0 degrees
(b) 45 degrees
(c) 90 degrees
(d) 180 degrees

Question 9: Question: What device is used to measure the RMS (Root Mean Square) value of an AC voltage or current?

(a) Ammeter
(b) Voltmeter
(c) Wattmeter
(d) Oscilloscope

Question 10: Question: What is the RMS value of an AC voltage or current?

(a) The maximum value reached during each cycle.
(b) The average value over one complete cycle.
(c) The value of the positive half-cycle.
(d) The equivalent DC value that produces the same heating effect.