For the following circuit, i) the switch has been in position 2 for a long time. It goes to position 1 at t=0. a) Calculate the charging time constant, Tc. b) Approximately how long does it take the E capacitor to fully charge? c) Write the charge equations for vc(t) 12 V and ic(t)

For the following circuit, i) the switch has been in position 2 for a long time. It goes to position 1 at t=0. a) Calculate the charging time constant, Tc. b) Approximately how long does it take the E capacitor to fully charge? c) Write the charge equations for vc(t) 12 V and ic(t)

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter17: Resistive-inductive Series Circuits

Section: Chapter Questions

Problem 2PA: You are a journeyman electrician working in an industrial plant. Your task is to connect an inductor...

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Concept explainers

Dielectric Breakdown

A dielectric is a material with low electrical conductivity and so is classified as an insulator. Dielectric materials are used to block the flow of electricity through them, allowing them to behave as an insulators. They can also be used to store electric charge or improve capacitance.Dielectrics have no free electrons for conduction because electrons are tightly bound to the nucleus. Because dielectrics contain a small number of electrons for electrical conductivity, they have a dipole. The two primary roles of dielectrics in electrical devices are insulation and electrical energy storage. An electric field polarizes the dielectric, and the polarization of the molecules allows dielectric materials to store charge.

Question

I'm confused as to how to find the Vth, it's supposed to be 9V but I don't undertand why?

For the following circuit,
i) the switch has been in position 2 for a long time.
It goes to position 1 at t=0.
a) Calculate the charging time constant, Tc.
b) Approximately how long does it take the E
capacitor to fully charge?
12 V
c) Write the charge equations for vc(t)
and ic(t)
R₁
2 ΚΩ
R4
6 kΩ
ww
1
O
2
R3
4 ΚΩ
R₂
5 ΚΩ
+
Vc
ic
C
0.33
uF

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Step 1: Parameter needs to be calculated:

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Step 2: Calculation of initial voltage

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Step 3: Calculation of time constant and total time for charging

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Step 4: Calculation of voltage and current expression

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