RC Circuits PH 203 Professor Lee Carkner Lecture 14.

Slides:

Advertisements

Similar presentations

ConcepTest 1 Series Resistors I

Advertisements

Direct Current Circuits

Circuits Electromotive Force Work, Energy and emf

Physics for Scientists and Engineers, 6e

Physics DC Circuits 19.1 Resistors in Series and Parallel 19.6 Capacitors in Series and Parallel 19.7 RC Circuit Ammeters and Voltmeters.

1 Chapter 24--Examples. 2 Problem In the figure to the left, a potential difference of 20 V is applied across points a and b. a) What is charge on each.

a b  R C I I R  R I I r V Lecture 10, ACT 1 Consider the circuit shown: –What is the relation between V a - V d and V a - V c ? (a) (V a -V d ) < (V.

Q26.1 Which of the two arrangements shown has the smaller equivalent resistance between points a and b? A. the series arrangement B. the parallel arrangement.

Which of the two cases shown has the smaller equivalent resistance between points a and b? Q Case #1 2. Case #2 3. the equivalent resistance is.

© 2012 Pearson Education, Inc. Which of the two arrangements shown has the smaller equivalent resistance between points a and b? Q26.1 A. the series arrangement.

©1997 by Eric Mazur Published by Pearson Prentice Hall Upper Saddle River, NJ ISBN No portion of the file may be distributed, transmitted.

Capacitors and/or TV (not Emf). 1. An empty capacitor does not resist the flow of current, and thus acts like a wire. 2. A capacitor that is full of charge.

2. the intensity of light bulb A increases.

Dielectrics PH 203 Professor Lee Carkner Lecture 9.

Magnetic Field PH 203 Professor Lee Carkner Lecture 15.

DC Circuits Chapter 26 Opener. These MP3 players contain circuits that are dc, at least in part. (The audio signal is ac.) The circuit diagram below shows.

DC circuits Physics Department, New York City College of Technology.

RC Circuits Physics 102 Professor Lee Carkner Lecture 16.

RC Circuits Physics 102 Professor Lee Carkner Lecture 16.

Multiloop Circuits PH 203 Professor Lee Carkner Lecture 13.

RL Circuits PH 203 Professor Lee Carkner Lecture 21.

Fig 28-CO, p.858. Resistive medium Chapter 28 Direct Current Circuits 28.1 Electromotive “Force” (emf)

Additional Questions (Direct Current Circuits)

RC Circuits Physics 102 Professor Lee Carkner Lecture 15.

Circuits Series and Parallel. Series Circuits Example: A 6.00 Ω resistor and a 3.00 Ω resistor are connected in series with a 12.0 V battery. Determine.

Direct Current When the current in a circuit has a constant direction, the current is called direct current Most of the circuits analyzed will be assumed.

Electricity Foundations of Physics. Electricity The movement of charge from one place to another Requires energy to move the charge Also requires conductors.

Capacitors, Ammeters, & Voltmeters. Capacitors ◊ ◊ Capacitors store electrical potential energy by creating a separation of charge, usually on two parallel.

Lecture 6 Direct Current Circuits Chapter 18 Outline Energy Source in Circuits Resistor Combinations Kirchhoff’s Rules RC Circuits.

Resistance. Review of Resistors The resistance is an intrinsic property of a material which impedes the flow of charge requiring a pd to be applied so.

Twenty Questions Electricity 1. Twenty Questions

Lecture 22: FRI 17 OCT DC circuits II Ch Physics 2113

FCI. Direct Current Circuits: 3-1 EMF 3-2 Resistance in series and parallel. 3-3 Rc circuit 3-4 Electrical instruments FCI.

Capacitors. A capacitor is a device which is used to store electrical charge ( a surprisingly useful thing to do in circuits!). Effectively, any capacitor.

Chapter 26 DC Circuits. Units of Chapter EMF and Terminal Voltage - 1, Resistors in Series and in Parallel - 3, 4, 5, 6, Kirchhoff’s.

Welcome to Physics Jeopardy Chapter 18 Final Jeopardy Question Equivalent Resistance 100 Complex circuits Misc Parallel.

DC circuits, RC circuits

Lecture 17: FRI 20 FEB 08 RC circuits Ch27.9 Physics 2102 Jonathan Dowling.

Welcome to Physics Jeopardy Chapter 17 Final Jeopardy Question Electric Current Circuits 100 Capacitance Voltage

Physics 2102 Circuits Circuits Physics 2102 Gabriela González b a.

DC Circuits. EMF and Terminal Voltage Electric circuit needs a battery or generator to produce current – these are called sources of emf. Battery is a.

AP Physics B Summer Course 年 AP 物理 B 暑假班 M Sittig Ch 21: Circuits.

Capacitors in a Circuit emf Resistors series parallel Circuit problems Capacitors in a circuit.

1. ConcepTest 19.1aSeries Resistors I 9 V Assume that the voltage of the battery is 9 V and that the three resistors are identical. What is the potential.

Capacitors, Batteries. Capacitors Create a difference in Potential based upon how much charge is stored V = q/C (V) C : Capacitance C = k ε o A /d k :

Capacitors in Circuits

CAPACITORS. A capacitor is a device used to “store” electric charge. It can store energy and release it very quickly!!

Series Series circuits Current in series circuits Voltage in series circuits.

1 18 Overview resistor & capacitor circuits Kirchoff’s Rules voltmeters & ammeters household circuits & safety Homework: 17, 27, 31, 33, 55, 67, 71, 85.

Physics 2102 Circuits Circuits Physics 2102 Gabriela González b a.

Phys102 Lecture 10 & 11 DC Circuits Key Points EMF and Terminal Voltage Resistors in Series and in Parallel Circuits Containing Resistor and Capacitor.

RC (Resistor-Capacitor) Circuits AP Physics C. RC Circuit – Initial Conditions An RC circuit is one where you have a capacitor and resistor in the same.

When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to A) 1 m/s. B) 1 km/s. C) 10 m/s.

Lecture 12: TUE 02 FEB DC circuits Ch Physics 2102 Jonathan Dowling.

CH Poll Bulb 1 10  20  Bulb 2 Which bulb will be brighter? 1.Bulb 1 2.Bulb 2 3.Neither; they will have the same brightness.

Lecture 12-1 Resistors in Parallel and in Serial R1R1 R2R2 i i ε.

Review Question Describe what happens to the lightbulb after the switch is closed. Assume that the capacitor has large capacitance and is initially uncharged,

AQA Physics Gravitational Fields, Electric Fields and Capacitance Section 9 Charging and Discharging a Capacitor.

RC Circuits Physics 102 Professor Lee Carkner Lecture 16.

Twenty Questions Electricity 1.

Capacitors, Batteries.

Clicker questions – AP C Circuits

Series Circuit – 1 bulb Series Circuit – 1 bulb.

Predict and Explain Task

Predict and Explain Task

Predict and Explain Task

Resistors in Parallel R1 R2 i ε.

Predict and Explain Task

Presentation transcript:

RC Circuits PH 203 Professor Lee Carkner Lecture 14

Capacitance  Remember that a capacitor stores charge: Q = C  V  C =  0 A/d  The potential across the capacitor can change with time    The voltage across an uncharged capacitor is zero   The voltage across a charged capacitor is equal to the applied potential  V C = 

Resistors and Capacitors  If you connect a uncharged capacitor to a resistor and a battery the capacitor will go from 0 to maximum charge over some time   The current in the circuit will start at a maximum and them go to zero as the capacitor charges   A capacitor C paired with a resistor R has a charging time related to a time constant (  )  = RC  This is the time to charge a capacitor to about 63% of the final value

Charging a Capacitor

Time Curve

Charge Over Time  If we charge a capacitor by connecting it to a battery of voltage , the charge and voltage on the capacitor is: V C =  [1-e (-t/  ) ]  Capacitor charges rapidly at first and then the rate of charge separation slows   At about t = 4  the capacitor is nearly fully charged

Discharging a Capacitor   Energy in the capacitor is dissipated through the resistor  Q C = CV C V C = V 0 e (-t/  )  where V 0 is the initial voltage on the capacitor

Using an Ammeter   Must be placed in series   Has low resistance  Otherwise would decrease the current

Using a Voltmeter   Must be placed in parallel   Has high resistance  So only very little current flows through it

Next Time  Read  Problems: Ch 27, P: 47, 49, 56, Ch 28, P: 2, 12

Consider two identical light bulbs in series. If a third identical light bulb is added in series, what happens to the current through the battery and the power that flows from the battery? A)increase, increase B)increase, decrease C)decrease, decrease D)decrease, increase E)Both stay the same

Consider two identical light bulbs in parallel. If a third identical light bulb is added in parallel, what happens to the current through the battery and the power that flows from the battery? A)increase, increase B)increase, decrease C)decrease, decrease D)decrease, increase E)Both stay the same