Electricity is produced whenever a magnet and a metal wire are moved relative to each other. Thus, an effective way to generate electricity is to spin a magnetic cylinder around a tightly coiled metal wire.
Which of the following sources of energy would be LEAST useful in driving the electric generator described above?



The force of wind, water pressure, steam, or even human power (for example, pedaling a bicycle) can start a metal cylinder spinning enough to generate electricity. However, sunlight has no kinetic energy with which to accomplish this task.

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