What will be the resistance of a 200 W, 250 V lamp?

Correct option is D

​$$R = \frac{V^2}{P}\\[10pt]\textbf{Where:} \\\bullet R = \text{Resistance (in ohms)} \\\bullet V = \text{Voltage (in volts)} \\\bullet P = \text{Power (in watts)}\\[10pt]\textbf{Given:} \\\bullet \text{Power, } P = 200\, \text{W} \\\bullet \text{Voltage, } V = 250\, \text{V}\\[10pt]R = \frac{250^2}{200} = \frac{62500}{200} = 312.5\, \Omega$$​​