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Series LCR with given resistance, impedance and r.m.s. voltage: true power consumed

The same question, asked 4 times: 21 Apr 2025 S1*, 26 Apr 2025 S2*, 11 Apr 2026 S2*, 19 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    21 Apr 2025 S1

    23
    In LCR series circuit, R = 18Ω18\Omega and impedance 33Ω33\Omega. An r.m.s. voltage of 220 V is applied across the circuit. The true power consumed in a.c. circuit is

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  2. Question 2

    26 Apr 2025 S2

    46
    In series LCR circuit R = 18Ω18\Omega and impedance is 30Ω30\Omega. An rms voltage 210 V is applied across the circuit. The true power consumed in AC circuit is nearly

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  3. Question 3

    11 Apr 2026 S2

    137
    In series LCR circuit, resistance is 18 Ω18\,\Omega and impedance 33 Ω33\,\Omega. An r.m.s. Voltage of 220220 V is applied across the circuit. The true power consumed in a c. circuit is

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  4. Question 4

    19 Apr 2026 S2

    138
    In series LCR circuit R=10 ΩR = 10\,\Omega and impedance is 30 Ω30\,\Omega. An r.m.s. voltage 210210 V, is applied across the circuit. The true power consumed in AC circuit is

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