PU CSS 2026 Alternating Current Free Quiz 2

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PU CSS 2026 Alternating Current Free Quiz 2

PU CSS Quiz

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Answered: 0 / 8

Remaining: 8

Navigator 8 Q

General

General 8 MCQs

11. What is the phase relationship between voltage and current in a purely resistive AC circuit?

A. 90° out of phase B. In phase C. 180° out of phase D. 45° out of phase

12. What is the phase relationship in a purely inductive AC circuit?

A. In phase B. Current leads voltage by 90° C. 180° out of phase D. Current lags voltage by 90°

13. What is the condition for resonance in an RLC circuit?

A. X_L = X_C B. X_L > X_C C. X_L < X_C D. X_L = R

14. What is the formula for resonant frequency in an RLC circuit?

A. f = 2π√(LC) B. f = 1/(2π√(LC)) C. f = 1/√(LC) D. f = √(L/C)

15. What happens to impedance at resonance?

A. Maximum B. Zero C. Minimum and equal to R D. Infinite

16. What is the power factor in an AC circuit?

A. cos φ = R/Z B. sin φ = R/Z C. tan φ = R/Z D. cot φ = R/Z

17. What is the formula for power in an AC circuit?

A. P = VI B. P = VI cos φ C. P = VI sin φ D. P = VI tan φ

18. How can power factor be improved?

A. Adding inductors B. Increasing resistance C. Decreasing voltage D. Adding capacitors

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