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A Light Bulb is Rated at 120 W for a 220 V A.C. Supply. Calculate the Resistance of the Bulb. - Physics

ConceptReactance and Impedance

Question

A light bulb is rated at 120 W for a 220 V a.c. supply. Calculate the resistance of the bulb.

Solution

Power of the bulb, P = 120 W

Voltage, V = 240 V

The resistance of the buld is given as

R = V^2/P = (240^2)/120 = 480  Omega

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Solution A Light Bulb is Rated at 120 W for a 220 V A.C. Supply. Calculate the Resistance of the Bulb. Concept: Reactance and Impedance.
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