The energy (H) consumed by an electrical appliance is calculated using the formula H = Pt, where P is the power of the appliance and t is the time in seconds. For example, a 250 W TV set operating for 1 hour (3600 seconds) consumes 250 W × 3600 s = 9 × 105 J of energy. A 1200 W toaster operating for 10 minutes (600 seconds) consumes 1200 W × 600 s = 7.2 × 105 J of energy. Consequently, the energy consumed by a 250 W TV set in 1 hour is greater than the energy consumed by a 1200 W toaster in 10 minutes.