(a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 13.7 s. Ω (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.44 ms. A

(a) Find its resistance R (in ohms) if the capacitor charges to 90.0% of its final value in 13.7 s. Ω (b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.44 ms. A

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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Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

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In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

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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 13.7 s.
Ω
(b) Find the average current (in A) delivered to the flash bulb if the capacitor discharges 90.0% of its full charge in 1.44 ms.
A

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