which one is having less resistance, a 220v,60wbulb or a 220 v, 40w bulb
Answers
Answered by
2
(1) P1=100 W
V1 = 220 V
________________
P = V×I
P = V × (V/R)
P = V^2/R
________________
100 = (220×220)/R1
R1 = 484 ohm
________________
(2) P2 = 60 W
V2= 220 V
________________
60 = (220×220)/R2
R2 = 806.6 ohm
_______________
Hence R2 is greater than R1.
V1 = 220 V
________________
P = V×I
P = V × (V/R)
P = V^2/R
________________
100 = (220×220)/R1
R1 = 484 ohm
________________
(2) P2 = 60 W
V2= 220 V
________________
60 = (220×220)/R2
R2 = 806.6 ohm
_______________
Hence R2 is greater than R1.
Similar questions