18.5 Coulomb's Law. The magnitude F of the electrostatic force exerted by one point charge on another point charge is directly proportional to the magnitudes.

Slides:



Advertisements
Similar presentations
Electric Forces Mr. Burns
Advertisements

Lecture 9 Review.
Chapter 21 Electric Charge and Electric Field. Charles Allison © 2000 Question An  particle with a charge +2e and a mass of 4m p is on a collision course.
Chapter 21. Electric Charge
Day 2 Electrical Charging & Coulomb’s Law. Objectives Charging by Conduction Charging by Induction Electroscopes Coulomb’s Law.
Chapter 23 Electric Fields
TOC 1 Physics 212 Electric Force Dependence on Amount of Charge Dependence on Distance Magnitude of the Coulomb Force Direction of the Coulomb Force Coulomb.
Electric Forces and Electric Fields. Properties of Electric Charges Two types of charges exist They are called positive and negative Named by Benjamin.
Nadiah Alenazi 1 Chapter 23 Electric Fields 23.1 Properties of Electric Charges 23.3 Coulomb ’ s Law 23.4 The Electric Field 23.6 Electric Field Lines.
General Physics II, Lec 11, Discussion, By/ T.A. Eleyan 1 Review (Electrostatic)
A hydrogen atom is composed of a nucleus containing a single proton, about which a single electron orbits. The electrical force between the two particles.
Charge Coulomb’s Law 1 TOC Dependence on Amount of Charge Dependence on Distance Magnitude of the Coulomb Force Direction of the Coulomb Force Coulomb.
Dr. Jie ZouPHY Chapter 23 Electric fields (cont.)
General Physics 2, Lec 3, By/ T.A. Eleyan 1 Additional Questions (Electric Field)
Lecture 9 Coulomb’s law Electric field. 3.3 Coulomb’s Law Coulomb’s law gives the force between two point charges: The force is along the line connecting.
General Physics II, Lec 4, By/ T.A. Eleyan 1 Lecture 4 Discussion.
Electricity Lecture Series
 The gravitational force between two masses, m1 & m2 is proportional to the product of the masses and inversely proportional to the square of the distance.
Electric Field Lines - a “map” of the strength of the electric field. The electric field is force per unit charge, so the field lines are sometimes called.
1. Electrostatics Electric Force. First review the gravitational force… Any two masses are attracted by equal and opposite gravitational forces: m1m1.
Chapter 16 Electric Forces and Electric Fields
Copyright © 2009 Pearson Education, Inc. Lecture 4 – Electricity & Magnetism (Electrostatics) a. Electric Charge, Electric Field & Gauss’ Law.
Electric Charge and Electric Field 16
Chapter 18 Electric Forces and Electric Fields The Origin of Electricity The electrical nature of matter is inherent in atomic structure. coulombs.
Physics for Bioscience (Part II) Electricity Magnetism Waves Sound Optics by Dr. Chittakorn polyon Department of Physics, Faculty of Science,
Electric Forces and Electric Fields
Electrical Charges and Coulomb’s Law
Electric Field Physics Overview Properties of Electric Charges Charging Objects by Induction Coulomb’s Law The Electric Field Electric Field Lines.
Chapter 18 Electric Forces and Electric Fields. The electrical nature of matter is inherent in atomic structure. coulombs.
Electrostatic Forces Homework: Complete handout. Magnitude of Force According to Coulomb’s Law  The magnitude of force exerted on a charge by another.
Q20. Electric Charge Force and Field
The Electric Field The electric field is present in any region of space if there exists electric forces on charges. These electric forces can be detected.
Chapter-18 Electric Forces and Electric Fields. Electric Charge Atomic Particle ChargeMass Electron –1.6  C9.11  Kg Proton +1.6 
Electric Charge and Electric Field
Electrostatics #5 Capacitance. Capacitance I. Define capacitance and a capacitor: Capacitance is defined as the ability of an object to store charge.
Electric Fields. The gravitational and electric forces can act through space without any physical contact between the interacting objects. Just like the.
REVISION ELECTROSTATICS. The magnitude of the electrostatic force exerted by one point charge (Q1) on another point charge (Q2) is directly proportional.
Chapter 18 Electric Forces and Electric Fields The Origin of Electricity The electrical nature of matter is inherent in atomic structure. coulombs.
Laws of Electric Charges. Electric Charge – electric charges exert forces on each other even when they are not in direct contact.
Electric Fields and Electrostatics. A field around a point charge diverges in a regular fashion A uniform field exists between two charged plates where.
Charles Allison © 2000 Chapter 21, Electric Charge, and electric Field.
Copyright © 2015 John Wiley & Sons, Inc. All rights reserved. Chapter 18 Electric Forces and Electric Fields.
Example 25.1: A proton, of mass 1.67× Kg, enters the region between two parallel plates a distance 20 cm apart. There is a uniform electric field.
Chapter 18 Electric Forces and Electric Fields The Origin of Electricity The electrical nature of matter is inherent in atomic structure. coulombs.
There are only two charges, positive and negative.
Electric Forces and Electric Fields
Chapter-18 Electric Charge, Forces and Electric Fields
Electric Forces and Electric Fields
Chapter 23: Electric Fields
The Electric Field Figure Force exerted by charge Q on a small test charge, q, placed at points A, B, and C.
COULOMB’S LAW Coulomb’s Law – charges exert forces on each other and have been shown to be directly proportional to the magnitude of the charge and inversely.
PHY 102: Lecture 1B 1.4 Charging Objects 1.5 Force between Charges.
DEFINITIONS: ELECTROSTATICS, ELECTRIC FIELDS and ELECTRIC CIRCUITS
Chapter 21, Electric Charge, and electric Field
Coulomb law.
16 – 2 Electric Force.
Physics 133 electromagnetism
CH-12: Electrostatic Phenomena
Physics 16/21 electromagnetism
Electric Forces and Electric Fields
Coulomb law.
Chapter-12 Electrostatic Phenomena Electric Forces and Electric Fields
The Electric Field The electric field is present in any region of space if there exists electric forces on charges. These electric forces can be detected.
Electric Charge and Electric Field
REVISION ELECTROSTATICS.
Charge & Coulomb’s Law
Force and Electric Fields
Coulombs Law.
Coulomb’s Law Every charged particle exerts a force on every other charged particle in the Universe with a force that is proportional to the product of.
2. An ion accelerated through a potential difference of 115 V experiences an increase in kinetic energy of 7.37 × 10–17 J. Calculate the charge on the.
Presentation transcript:

18.5 Coulomb's Law

The magnitude F of the electrostatic force exerted by one point charge on another point charge is directly proportional to the magnitudes q 1 and q 2 of the charges and inversely proportional to the square of the distance r between them.

18.5 Coulomb's Law The magnitude F of the electrostatic force exerted by one point charge on another point charge is directly proportional to the magnitudes q 1 and q 2 of the charges and inversely proportional to the square of the distance r between them.

18.5 Coulomb's Law The proportionality constant k is known as Coulomb’s constant. It is given by, where ε 0 = 8.85  C 2 /N.m 2, is called the permittivity of free space.

A Model of the Hydrogen Atom

In the Bohr model of the hydrogen atom, the electron (-e) is in orbit about the nuclear proton (+e) at a radius of r = 5.29× m, as Figure shows. Determine the speed of the electron, assuming the orbit to be circular.

The Force on a Point Charge Due to Two or More Other Point Charges Consider the following three Charges on a Line. Find the net electrostatic force on q 3.

18.6 The Electric Field

The electric field is present in any region of space if there exists electric forces.

18.6 The Electric Field The electric field is present in any region of space if there exists electric forces. These electric forces can be detected using a test charge. Test charges are theoretical positive charges that do not alter the electric field to be detected.

18.6 The Electric Field The electric field is present in any region of space if there exists electric forces. These electric forces can be detected using a test charge. Test charges are theoretical positive charges that do not alter the electric field to be detected. Electric field at a point in space is defined as the force per unit test charge placed at that point.

The Electric Field of a Point Charge

Problem-29 Two charges are placed on the x axis. One charge (q 1 = +8.5  C) is at x 1 = +3.0 cm and the other (q 2 = -21  C) is at x 1 = +9.0 cm. Find the net electric field (magnitude and direction) at x = 0 cm.

Con-Ex:11Symmetry and the Electric Field Figure shows point charges fixed to the corners of a rectangle in two different ways. The charges all have the same magnitudes, but they have different signs. Consider the net electric field at the center C of the rectangle in each case. Which field is larger?

Con-Ex:11Symmetry and the Electric Field

The Parallel Plate Capacitor

Electric field between two parallel plates