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

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

26 `Omega`

13 `Omega`

230 `Omega`

24 `Omega`

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