Solution P= 100 WV = 250 VP = VIP =VVR =V2RR =V2P =250×250100 =625 OhmCurrent drawn I = VR =250625 =0 4 AEnergy =Power ×time = 100 ×50 =5000 J

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Solution

P = 100 W V = 250 V P = V I P = V \frac{V}{R} = \frac{V^{2}}{R} R = \frac{V^{2}}{P} = \frac{250 \times 250}{100} = 625 O h m C u r r e n t d r a w n I = \frac{V}{R} = \frac{250}{625} = 0.4 A E n e r g y = P o w e r \times t i m e = 100 \times 50 = 5000 J