Alternating Current and Voltage MCQ

Alternating Current and Voltage MCQ Questions

• 1. AC stands for ________.
• 2. A phasor represents ___________.
• 3. What is the peak to peak voltage of the waveform?
• 4. A half cycle average voltage of 12 v is equal to ____ rms voltage
• 5. What is the fourth harmonic of a fundamental frequency of 400hz?
• 6. The peak value of a sine wave is equal to ____ the RMS value.
• 7. What do you mean by alter alternator?
• 8. The term “RMS” stands for __________ in electronics.
• 9. A sine wave's peak-to-peak voltage value is always twice its peak voltage value.
• 10. If a wave has frequency of 2 Hz, it has a period of ?
• 11. Most practical alternators generate electricity from _____.
• 12. Transformer works on the principle of _____.
• 13. What do you mean by Instantaneous Value?
• 14. Root Mean Square Value is ________.
• 15. Is Mean or average value is defined as that value of direct current which sends the same charge in a circuit in the same time as is sent by the given alternating current in its half time period.
• 16. Which one is the reciprocal of impedance?
• 17. Why can’t the DC ammeter measure an alternating current?
• 18. Who invented the AC?
• 19. In a series resonant circuit, the a.c. voltage across resistance R, inductance L and capacitance C are 5V, 10V and 10V, respectively. The a.c. voltage applied to the circuit will be _______.
• 20. In a series L, R, C, circuit which is connected to a.c. source. When resonance is obtained then net impedance Z will be _____.