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The RC charging circuit in a camera flash unit has a voltage source of 265 V and a capacitance of 136 µF.
HINT
(a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 17.2 s.
54.96
хо
(b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.04 ms.
3.66
ХА

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