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Ratio of apparent power to true power in a series LCR circuit

The same question, asked 3 times: 22 Apr 2025 S2, 26 Apr 2025 S2*, 11 Apr 2026 S2. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    22 Apr 2025 S2

    7
    In an a.c. circuit containing L,CL,C and RR in series, the ratio of apparent power to the true power is ( Z and R are the impedance and resistance respectively, ϕ=\phi = phase angle)

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  2. Question 2

    26 Apr 2025 S2

    20
    In an a.c. circuit containing L,C,RL,C,R in series the ratio of true power to apparent power is ( Z=Z = impedance of the circuit and R is the resistance)

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  3. Question 3

    11 Apr 2026 S2

    136
    In an a.c. circuit containing L, C and R in series, the ratio of apparent power to the true power is (Z= impedance of the circuit and R= resistance )

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