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A camera flash gets its energy from a 150 μF capacitor and requires 170 V to...

A camera flash gets its energy from a 150 μF capacitor and requires 170 V to fire.

a) If the capacitor is charged by a 200 V source through an 18 kΩ resistor, how long must the photographer wait between flashes? (Assume the capacitor is fully discharged with each flash.)

b) Of the total energy drawn from a battery in charging an RC circuit, show that only half ends up as stored energy in the capacitor. Hint: What happens to the rest of the energy? You’ll need to integrate…

Science   Advanced-Physics   
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