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Basic Electrical Engineering: AC Circuits
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Basic Electrical Engineering: AC Circuits
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25 Questions

1. What is the correct expression for the rms value of current?
2. What is the value of impedance at resonance?
3. What is the frequency in resonance condition?
4. What is the value of the form factor for sinusoidal current?
5. Calculate the crest factor if the peak value of current is 10A and the rms value is 2A.
6. What is φ in terms of voltage?
7. If maximum value of current is 5√2 A, what will be the value of RMS current?
8. For a rectangular wave, average current is ______ rms current.
9. What is the effective value of current?
10. For an RL circuit, the phase angle is always ________
11. What is the resonance frequency of ac circuit?
12. For a direct current, the rms voltage is ________ the mean voltage.
13. What is the resonance condition?
14. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the phase difference.
15. For a direct current, the rms current is ________ the mean current.
16. Peak value divided by the rms value gives us?
17. In a sinusoidal wave, average current is always _______ rms current.
18. Average value of current over a full cycle is?
19. Find the average value of current when the current that are equidistant are 4A, 5A and 6A.
20. What is the correct expression for the form factor?
21. Which, among the following, is the correct expression for φ.
22. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a x V 50Hz sinusoidal supply. The current in the circuit is 8.2A. Calculate the value of x.
23. What is φ in terms of voltage?
24. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the current in the circuit.
25. A resistance of 7 ohm is connected in series with an inductance of 31.8mH. The circuit is connected to a 100V 50Hz sinusoidal supply. Calculate the voltage across the inductor.

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