Solar energy is used to power some calculators and watches.

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Multiple Choice

Solar energy is used to power some calculators and watches.

Explanation:
Solar energy powers small devices by converting sunlight directly into electricity with photovoltaic cells. That’s why calculators and watches can run on solar power—the tiny solar cells on them turn light into a small electric current to operate the electronics or recharge a battery. Wind would require turbines and infrastructure, while biomass and geothermal are more about larger-scale electricity or heat sources, not direct, on-device power for these compact gadgets.

Solar energy powers small devices by converting sunlight directly into electricity with photovoltaic cells. That’s why calculators and watches can run on solar power—the tiny solar cells on them turn light into a small electric current to operate the electronics or recharge a battery. Wind would require turbines and infrastructure, while biomass and geothermal are more about larger-scale electricity or heat sources, not direct, on-device power for these compact gadgets.

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