Several electric bulbs designed to be used on a 220 V electric supply line, are rated 10 W. How many lamps can be connected in parallel with each other across the two wires of 220 V line if the maximum allowable current is 5 A?

Resistance R1 of the bulb is given by the expression, Supply voltage, V = 220 V Maximum allowable current, I = 5 A Rating of an electric bulb P=10watts Because R=V2/P ˆ´ Number of electric bulbs connected in parallel are 110

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