An electric bulb of \( 500 \, \text{watt} \) at \( 100 \, \text{volt} \) is used in a circuit having a \( 200 \, \text{V} \) supply. Calculate the resistance \( R \) to be connected in series with the bulb so that the power delivered by the bulb is \( 500 \, \text{W} \).
