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Capacitors and potential difference

  1. Jan 12, 2007 #1
    My physics textbook kinda offhandly says capacitors can be charged to higher potential differences than the battery used to charge them and uses a camera flash as an example, however it doesn't say how this is done. What it does say is attaching a capacitor to a batter in a simple circuit will charge the capacitor to the same potential as the battery.
  2. jcsd
  3. Jan 12, 2007 #2


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  4. Jan 13, 2007 #3


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  5. Jan 13, 2007 #4
    A boost circuit that uses an inductor, a switch (transistor), a diode, and the capacitor can boost a couple of volts to a couple of thousand volts or any where in between. I suspect this is what a flash uses. There are lots of example circuits you can look up and their complexity and cost are a function of the application....pennies to thousands of dollars for milli watts(volts) to Megawatts(volts)
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