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Voltage and Current

Q1:

Batteries differ from fuel cells in that

A a battery is a closed system

B a battery uses hydrogen and oxygen to create electricity

C a battery uses a polymer electrolyte membrane

D none of the above

ANS:A - a battery is a closed system

The key difference between a battery and a fuel cell is that a battery runs down as the electrodes dissolve, but a fuel cell operates for as long as oxygen and hydrogen flow. The battery is an energy storage device. It stores its fuel internally. A fuel cell is an energy conversion device. Its fuel is supplied externally.



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