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A light bulb is rated at 100W for a 220V supply. Find:
(a) The resistance of the bulb.
(b) The peak voltage of the source.
(c) The RMS current through the bulb.
a) (a) 484 ohms, (b) 220V, (c) 0.45A
b) (a) 242 ohms, (b) 110V, (c) 0.90A
c) (a) 484 ohms, (b) 110V, (c) 0.90A
d) (a) 242 ohms, (b) 220V, (c) 0.45A

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