Capacitance Physics Department, New York City College of Technology.

Slides:

Advertisements

Similar presentations

You reposition the two plates of a capacitor so that the capacitance doubles. There is vacuum between the plates. If the charges +Q and –Q on the two plates.

Advertisements

© 2012 Pearson Education, Inc. The two conductors a and b are insulated from each other, forming a capacitor. You increase the charge on a to +2Q and increase.

Electric Potential Electric forces are conservative. Work done by an electric force is W=-q o Ed  U=-W.

Scott Starks, PhD, PE Department of Electrical & Computer Engineering UTEP.

Copyright © 2009 Pearson Education, Inc. Dielectrics.

Halliday/Resnick/Walker Fundamentals of Physics 8th edition

Lecture 4 Capacitance and Capacitors Chapter 16.6  Outline Definition of Capacitance Simple Capacitors Combinations of Capacitors Capacitors with.

Capacitance and Dielectrics

Capacitors A device storing electrical energy. Capacitor A potential across connected plates causes charge migration until equilibrium VV – + –q+q Charge.

Electric Energy and Current Chapter 18 Electrical Potential Energy- the potential energy between charges at a distance, or between a charge and an electric.

17-7 Capacitance A device that stores electric charge Two plates that are separated by an insulator Used in electronic circuits Store charge that can later.

Chapter 26:Capacitance and Dielectrics. Capacitors A capacitor is made up of 2 conductors carrying charges of equal magnitude and opposite sign. The Capacitance.

Electric Potential Electric forces are conservative. Work done by an electric force is W=-q o Ed  U=-W.

1 Capacitance and Dielectrics Chapter 27 Physics chapter 27.

Capacitance Definition Parallel Plate Capacitors Cylindrical Capacitor

Lecture 8 Friday January 30 Capacitors and Review.

Lecture 7 Capacitors. Micro-economists are wrong about specific things, and macroeconomists are wrong about things in general. Yoram Bauman.

ECE 201 Circuit Theory I1 Capacitance Capacitance occurs whenever electrical conductors are separated by a dielectric, or insulating material. Applying.

Copyright © 2009 Pearson Education, Inc. Lecture 5 - Capacitance Capacitors & Dielectrics.

A +Q-Q d 12 V +  device to store charge –(also stores energy) connect capacitor to battery (V) –plates become oppositely charged +Q/-Q Q = C V charge.

Capacitance Physics 102 Professor Lee Carkner Lecture 13.

Chapter 24 Capacitance, Dielectrics, Electric Energy Storage

A capacitor is a device that stores electrical potential energy by building up a difference in charge on two pieces of metal.

Capacitance & Dielectrics

Engineering Science EAB_S_127 Electricity Chapter 4.

Goal: To understand the basics of capacitors Objectives: 1)To learn about what capacitors are 2)To learn about the Electric fields inside a capacitor 3)To.

Capacitance�and�Dielectrics

Electrical Energy and Capacitance. Electrical Potential Energy Potential energy associated with the electrical force between two charges Form of mechanical.

Capacitance and Geometry

Electric Potential. Electrostatic Potential Energy and Potential Difference The electrostatic force is conservative – potential energy can be defined.

Chapter 17 Electric Potential. Objectives: The students will be able to: Given the dimensions, distance between the plates, and the dielectric constant.

Capacitors. What are they? A device that stores electrical potential energy by storing charge. How is that useful? Capacitors are used when a lot of energy.

Which of these configurations gives V = 0 at all points on the y-axis? 4) all of the above 5) none of the above 10. Equipotential Surfaces III 1) x +2.

GENERAL PHYSICS LECTURE Chapter 26 CAPACITANCE AND DIELECTRICS Nguyễn Thị Ngọc Nữ PhD: Nguyễn Thị Ngọc Nữ.

Lecture#06 Capacitor and Inductor Instructor: M. Mateen Yaqoob.

111/16/2015 ELECTRICITY AND MAGNETISM Phy 220 Chapter 4: Capacitors.

A uniform electric field is an electric field in which the field strength does not vary. This gives constant force a constant force on any charge that.

The two conductors a and b are insulated from each other, forming a capacitor. You increase the charge on a to +2Q and increase the charge on b to –2Q,

Lecture 06 - Inductors and Capacitors

Electric field, Electric Potential Difference and Capacitance.

Capacitance, Dielectrics, Electric Energy Storage

Electrostatics #5 Capacitance. Capacitance I. Define capacitance and a capacitor: Capacitance is defined as the ability of an object to store charge.

1 Capacitance and Capacitors Capacitance:  Any volume (material) that has net charge in it produces electric potential around it (Gauss’ Law).  The ratio.

Copyright © 2009 Pearson Education, Inc. Dielectrics.

Heated filamentPositively charged can E = 800,000 N/C d = 2.5 cm, 1 e = 1.60  C v final ? Electron Gun.

12/4/2016 Advanced Physics Capacitance  Chapter 25 – Problems 1, 3, 8, (17), 19, (33), 39, 40 & 49.

Chapter 19 Summary Bare-bones Style i.e. stuff you need down COLD.

Consider a charged capacitor whose plates are separated by air (dielectric constant 1.00 ). The capacitor is electrically isolated from its surroundings.

What charge exists on a 30 μF capacitor (fully charged) with a 120 V potential difference between its plates and what is the energy stored? Ans: 3.6.

Review: Kirchoff’s Rules Activity 13C Achieved level: Qn. 1; Merit: Qn. 2, 3, 4, 5, 6 Excellence: Qn. 3 d, 6 b) iv. Challenge Problem on paper at the front.

Capacitor Device that can store electric charge Two conducting objects are placed near one another but not touching Power source charges up the plates,

Capacitors A capacitor is a device that has the ability “capacity” to store electric charge and energy.

Electrostatic Energy and Capacitors. Capacitance An indication as to how easy it is to accumulate charge on an object. Ex. What is the capacitance of.

Chapter 25 Capacitance In this chapter we will cover the following topics: -Capacitance C of a system of two isolated conductors.

Chapter 25 Capacitance In this chapter we will cover the following topics: -Capacitance C of a system of two isolated conductors.

Chapter 11 Capacitance.

Capacitance Capacitance occurs whenever electrical conductors are separated by a dielectric, or insulating material. Applying a voltage to the conductors.

Lecture 09 - Inductors and Capacitors

PHYS 221 Recitation Kevin Ralphs Week 3.

Dielectrics Action of a Dielectric

Potential Difference and Capacitance

What charge exists on a 30 μF capacitor (fully charged) with a 120 V potential difference between its plates and what is the energy stored? Ans: 3.6.

Capacitor A device that stores energy by maintaining a separation between positive and negative charge. Can store electric charge / energy in the electric.

Capacitance Capacitance occurs whenever electrical conductors are separated by a dielectric, or insulating material. Applying a voltage to the conductors.

Chapter 25 Capacitance-II

Capacitor Is a device that stores energy by maintaining a separation between positive and negative charge. Compare stored energy / charge to a bucket.

Capacitance Capacitance occurs whenever electrical conductors are separated by a dielectric, or insulating material. Applying a voltage to the conductors.

Presentation transcript:

Capacitance Physics Department, New York City College of Technology

Key words Capacitor Capacitance Parallel-plate capacitor

Capacitor A device that can store electric charge

Capacitance For a given capacitor, we find Q is the amount of charge acquired by each conducting plate of the capacitor V is the voltage applied across it C is called capacitance

Capacitance The unit of capacitance is farad (F) C does not depend on Q or V Instead, C depends on Size Shape Relative position of the two conductors The insulating material between them

Parallel-plate capacitor Plate area A Plate separation d Permittivity of the insulating material ε Dielectric constant k with Capacitance C

Energy stored in a capacitor The electric potential energy stored in a capacitor is Since, we have

Example #1 capacitor