The flash unit of a camera has a 2-mF capacitor charged to 40 V. (a) How much charge is
Chapter 7, Problem 7.20(choose chapter or problem)
The flash unit of a camera has a 2-mF capacitor charged to 40 V. (a) How much charge is on the capacitor? (b) What is the energy stored in the capacitor? (c) If the flash fires in 0.8 ms, what is the average current through the flashtube? (d) How much power is delivered to the flashtube? After a picture has been taken, the capacitor needs to be recharged by a power unit that supplies a maximum of 5 mA. How much time does it take to charge the capacitor?
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