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Why is my battery of galvanic cells not enough to power a lamp rated for a lower voltage than the battery provides?

Maurice points out at the critical problem and answers the old classical problem. Why can't a 12 V ordinary battery be used in a car when a "large" lead-acid batery also generates 12 V? Your ...
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7 votes

Why is my battery of galvanic cells not enough to power a lamp rated for a lower voltage than the battery provides?

It is not a problem of voltage. It is a problem of current and power. Whatever its nominal voltage, your bulb has a power to be known in watts. If your $\ce{Zn/Cu}$ cells are not able to produce the ...
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