Question

Which of the following would have the highest power rating? 100 joules of energy used in 0.5 seconds 500 joules of energy used in 0.5 seconds 100 joules of energy used in 0.25 seconds 500 joules of energy used in 0.25 seconds

Answer 1

Power = (amount of energy moved or work done) / (the time it takes)

100 joules of energy used in 0.5 seconds = (100/0.5) = 200 watts

500 joules of energy used in 0.5 seconds = (500/0.5) = 1,000 watts

100 joules of energy used in 0.25 seconds = (100/0.25) = 400 watts

500 joules of energy used in 0.25 seconds = (500/0.25) = 2,000 watts

The last choice describes the greatest power.