The RC charging circuit in a camera flash unit has a voltage source of 275 V...

Question

Question

The RC charging circuit in a camera flash unit has a voltage source of 275 V and a capacitance of 125 $\mu$ F.

Find its resistance R if the capacitor charges to 90% of its final value in 15 s.
Find the average current delivered to the flash bulb if the capacitor discharges 90% of its full charge in 1.00 ms.

Answer 1

Answer #1

vscle HRc) YCH. voltage across (apaciter = at t-15s & Velin- ogus ogus. As line 125x15 en(10) * 125X106 i R=52.1153kr / when

Answer 2

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