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60 W- 220 bulb and 100 W- 220 V bul...

60 W- 220 bulb and 100 W- 220 V bulb are connected in parallel to main supply . Which bulb will draw more current ?

Text Solution

Verified by Experts

For Bulb - I : `P=60W`
`V_(1)=220` volt
`R_(1)=(V_(1)^(2))/(P_(1))`
`R_(1)=(220xx220)/(60)`
`R_(1)=(48400)/(60)`
`R_(1)=806.67Omega`
For Bulb - II : `P_(2)=100W`
`V_(2)=200`V
`R_(2)=(V_(2)^(2))/(P_(2))`
`R_(2)=(220xx220)/(100)`
`R_(2)=(48cancel400)/(cancel100)`
`R_(2)=484Omega`
`becauseR_(2)ltR_(1)`
So bulb (100 W- 220V) will withdraw more current .
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