The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. One such unit operates at 320 V using the capacitor shown to the right (185 μF) a) Find the charge stored in the flash’s capacitor. b) Determine the energy that is used to produce the flash in this unit. c) Assuming that the flash lasts for 1.4x10-3 s, find the power consumed by the flash.
Homework Answers
a) Q = C V = 185 * 10-6 * 320
charge stored = 0.0592 C
b) W = 1/2 C V2
= 1/2 * 185 * 10-6 * 3202
energy = 9.47 J
c) P = W / t = 9.47 / 1.4 * 10-3
power consumed= 6.76 * 103 W
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