The RC charging circuit in a camera flash unit has a voltage source of 295 V and a capacitance of 126 µF. HINT Apply the expression q = Q(1 – e-t/RC). Click the hint button again to remove this hint. (a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 14.2 s. (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.14 ms.

The RC charging circuit in a camera flash unit has a voltage source of 295 V and a capacitance of 126 µF. HINT Apply the expression q = Q(1 – e-t/RC). Click the hint button again to remove this hint. (a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 14.2 s. (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.14 ms.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 69AP: Consider the circuit below. The battery has an emf of = 30.00 V and an internal resistance of r =...

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