A standard filament lamp consumes $100 \mathrm{~W}$ when connected to $200 \mathrm{~V}$ a.c. mains supply. The peak current through the bulb will be :

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Aicharya · Accepted Answer

Power, $\begin{aligned} \mathrm{P} & =\mathrm{I}_{\mathrm{rms}} \mathrm{V}_{\mathrm{rms}} \ \mathrm{I}_{\mathrm{rms}} & =\frac{\mathrm{P}}{\mathrm{V}_{\mathrm{rms}}}=\frac{100}{200}=\frac{1}{2} \ \mathrm{I}_0 & =\sqrt{2} \mathrm{I}_{\mathrm{rms}} \ \mathrm{I}_0 & =\sqrt{2} 	imes \frac{1}{2} \ \mathrm{I}_0 & =\frac{1}{\sqrt{2}}=0.707 \mathrm{~A} \end{aligned}$

A standard filament lamp consumes $100 \mathrm{~W}$ when connected to $200 \mathrm{~V}$ a.c. mains supply.…

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