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Series LCR of 0.5 mH, 20 microfarad, 20 ohm on 220 V with current in phase: peak current

The same question, asked 2 times: 12 May 2024 S1, 13 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    12 May 2024 S1

    39
    An inductor of 0.5 mH, a capacitor of 20 μ20\,\muF and a resistance of 20 Ω20\,\Omega are connected in series with a 220 V a.c. source. If the current is in phase with the e.m.f., the maximum current in the circuit is x\sqrt{x} A. The value of xx is

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  2. Question 2

    13 Apr 2026 S2

    138
    An inductor of 0.50.5 mH, a capacitor of 20 μ20\ \muF and resistance 20 Ω20\,\Omega are connected in series with a 220220 V ac source. If the current is in phase with the emf, the amplitude of current of the circuit is [x]1/2[x]^{1/2} A. The value of xx is

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