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  4. 120 AC voltage is applied to 10 ohm resistance. The peak voltage across the resistor is

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Q. $120\, AC$ voltage is applied to $10$ ohm resistance. The peak voltage across the resistor is

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Solution:

Here, $V_{rms}=120\,AC$
Peak voltage $V_{0}=V_{rms} \sqrt{2}$
$=120 \sqrt{2}\,V$