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Which device directly changes the chemical energy released during the combustion of fuels such as hydrogen and methane into electrical energy?

1. Electrolytic cell
2. Dynamo
3. Ni-Cd cell
4. Fuel cell

Correct answer: Fuel cell

Solution

A fuel cell directly converts the chemical energy from the combustion of fuels like hydrogen and methane into electrical energy through an electrochemical reaction, making it the appropriate choice.

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