The circuit in Figure P5.59 models the charging circuit of an electronic camera flash. The flash should be charged to vC ? 7.425V for each use. Assume C = 1.5mF, R1 = 1k?, and R2 = 1?.
a. How long does it take the flash to recharge after taking a picture?
b. The shutter button stays closed for 1/30 s. How much energy is delivered to the flash bulb R2 in that interval? Assume the capacitor is fully charged.
c. If the shutter button is pressed 3 s after a flash, how much energy is delivered to the bulb R2?
Analysis:
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