An electric buld is rated 220V and 100W. When it is operated on 110V,what will be power consumed?
Answers
Answered by
2
P = V2/R
If V = 220 V we have
100 W = 2202/R
R = 2202/100 Ω = 484 Ω. This is the resistance of the bulb.
When V = 110 V, power consumed = V2/R = 1102/484 = 25 W.
If V = 220 V we have
100 W = 2202/R
R = 2202/100 Ω = 484 Ω. This is the resistance of the bulb.
When V = 110 V, power consumed = V2/R = 1102/484 = 25 W.
Answered by
0
p=vi
100=220*i
5/11A
v=ir
220/(5/11)=R
r=484 ohm
case 2
v=110
i=v/r
110/484
i=5/22A
p=vi
110*5/22
p=25 w
100=220*i
5/11A
v=ir
220/(5/11)=R
r=484 ohm
case 2
v=110
i=v/r
110/484
i=5/22A
p=vi
110*5/22
p=25 w
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