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Home Q & A Board Science-Related Homework Help Physics
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lenorefrancis lenorefrancis
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11 years ago
I understand the way a capacitor works, but I am a little confused as to how exactly it can put out more voltage than it is being given. For example, a capacitor used for a camera flash can supply the flash with several hundred volts even though the battery is only 1.5V. Does this have anything to do with the charge? I am a little confused about what role charge plays in this. Thanks.
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#1
11 years ago
Take the capacitor apart from the battery and somehow decrease its capacity, like decrease the distance between the panels,
Only then can you increase its voltage
(C=Q/V=kEl/A)
If the capacitor stays attached it is impossible to increase its voltage.
wrote...
#2
11 years ago
This has nothing to do with the capacitor, but with the charging circuit, which takes a DC voltage of 1.5 volts, chops it into an AC voltage, passes it through a step-up transformer to give an AC voltage of several hundred volts, and rectifies it to give a DC voltage to charge the capacitor.
wrote...
#3
11 years ago
I have no idea how they do it in cameras. However, one can increase a voltage by charging two capacitors in parallel and then reconnecting them in series for discharge.
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