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 ?
Answers
Answered by
2
Answer:
Kindly refer to the attachment ☺☺☺
Attachments:
Answered by
11
Answer:
εηηο!❤
______________________
As we know
P=V^2/R
R =V^2/P
___________________
Resistance for 1st lamp
R1 = V^2/P = (220)^2/100
=484Ω
_________________
Resistance of second lamp
R2= V^2/P = (220)^2/60
=2420/3Ω
________________
Resistance are connected in parallel
1/R = 1/R1 +1/R2
=1/484 + 3/2420
1/R=8/2420
R=2420/8 Ω
_____________
current = V/R
=220 x 8/ 2420
=0.73A
__________________hope helps ❤
Similar questions