Question

Two lamps one rated at 100W at 220V ,and the other rated at 60W at 220V are connected in parallel to electric mains supply.What current is drawn from the line in main supply ?

Answer 1

Answer:

Kindly refer to the attachment ☺☺☺

Answer 2

Answer:

εηηο!❤

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As we know

P=V^2/R

R =V^2/P

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Resistance for 1st lamp

R1 = V^2/P = (220)^2/100

=484Ω

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Resistance of second lamp

R2= V^2/P = (220)^2/60

=2420/3Ω

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Resistance are connected in parallel

1/R = 1/R1 +1/R2

=1/484 + 3/2420

1/R=8/2420

R=2420/8 Ω

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current = V/R

=220 x 8/ 2420

=0.73A

__________________hope helps ❤