April 19, 2015

Homework Help: Physics (simple electronics)

Posted by Mike on Thursday, February 24, 2011 at 10:23pm.

The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 775 F capacitor is 330 V.

(a) Determine the energy that is used to produce the flash in this unit.

(b) Assuming that the flash lasts for 5.0*10^-3 s, find the effective power or "wattage" of the flash.

So far:
0.000775 Farads= Coulumbs / 330V

Now here I'm not sure what to do next.

But I push on:




But, that answer is kicked backed as wrong, and I'm not quite sure how to go about part A.

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