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These are electric cells (not batteries.) From left to right, the sizes are AAA, AA, C, and D. All four produce the same voltage, 1.5 volts, but they are not interchangeable. Even if it would fit, you should not use the wrong cell in a device. Besides size, what else is different about them?

Answer:

While they all produce the same voltage, they produce different amperages. Volts tell us the electromotive force, basically how hard the electrons are being pushed. Amperage tell us current, how many electrons are being pushed. As you put more amperage through a wire, more of the energy is converted to heat. The larger the electric cell, the more amperage it produces. Using too much amperage can burn out a wire, a circuit, or pop a circuit breaker. If you tried to run a device that should have an AAA cell with a D cell, the increased amperage would probably damage or destroy the device. On the other hand, if you tried powering a D cell device with an AAA cell, it would probably not have enough amperage to do much, if anything.
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