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  4. A 100 Ω. resistor is connected to a 220 V, 50 Hz ac supply. The rms value of current in the circuit is

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Q. A $100\,\Omega$. resistor is connected to a $220\,V$, $50\,Hz$ ac supply. The rms value of current in the circuit is

Alternating Current

Solution:

Here, $R=100\,\Omega$,
$V_{rms}=220\,V$,
$\upsilon=50\,Hz$
$\therefore I_{rms}=\frac{V_{rms}}{R}$
$=\frac{220}{100}$
$=2.2\,A$