Which uses more energy, a 250 W TV set in 1 h, or a 1200 W toaster in 10 minutes? [2 MARKS]
Each point: 1 Mark
1. Energy used by 250 W TV set in 1 h = 250 W × 1h = 250 Wh
2. Energy used by 1200 W toaster in 10 min. (i.e., 16 h) = 1200 W × (16) h = 200 Wh
Thus, a 250 W TV set uses more power in 1 h than a 1200 W toaster in 10 minutes.