Physicsmedium · Past Paper
A 1000 W heater is used for 2 hours. What is the energy consumed in Joules?
A2000 J
B7.2 x 10^6 J
C3.6 x 10^6 J
D7200 J
✓ Correct Answer: B — 7.2 x 10^6 J
Energy = Power * Time = 1000 W * (2 * 3600 s) = 7,200,000 J.
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