Question

Several electric bulbs designed to be used on a 220 V electric supply line, are rated 50 W.
How many bulbs can be connected in parallel with each other across the two wires of the 220 V line if the maximum allowable current is 2.5 A?​

Answer 1

Answer:

expression,

Supply voltage, V = 220 V

Maximum allowable current, I = 5 A

Rating of an electric bulb P=10watts

Because R=V2/P

According to Ohm’s law,

V = I R

Let R is the total resistance of the circuit for x number of electric bulbs

R=V/I

=220/5=44 Ω

Resistance of each electric bulb, R1=4840Ω

∴ Number of electric bulbs connected in parallel are 110.

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Answer 2

Explanation:

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