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A filament bulb (500 W, 100 V) is to be ...

A filament bulb `(500 W, 100 V)` is to be used in a `230 V` main supply. When a resistance `R` is connected in series, it works perfectly and the bulb consumers `500 W`. The value of `R` is

A

`13 Omega`

B

`230 Omega`

C

`46 Omega`

D

`26 Omega`

Text Solution

Verified by Experts

The correct Answer is:
D
`i= 500/100 = 5A`

So, 130 = 5R
`R = 26Omega`
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