We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byRegina Cash
Modified about 1 year ago
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 with a proton with a charge +e and mass m p. The only force acting is the electrostatic force. Which of the following statements is true about the magnitudes of the forces on the two particles? p Charge+2e+e Mass4m p mpmp A) F = F p B) 2F = F p C) 4F = F p D) F = 2F p E) F = 4F p
Charles Allison © 2000 Question An particle with a charge +2e and a mass of 4m p is on a collision course with a proton with a charge +e and mass m p. The only force acting is the electrostatic force. Which of the following statements is true about the accelerations of the two particles? p Charge+2e+e Mass4m p mpmp A) a = a p B) 2a = a p C) 4a = a p D) a = 2a p E) a = 4a p
Charles Allison © Coulomb’s Law Example 21-2: Three charges in a line. Three charged particles are arranged in a line, as shown. Calculate the net electrostatic force on particle 3 (the -4.0 μC on the right) due to the other two charges.
Charles Allison © Coulomb’s Law Example 21-3: Electric force using vector components. Calculate the net electrostatic force on charge Q 3 shown in the figure due to the charges Q 1 and Q 2.
Charles Allison © 2000 Question What is the correct FBD for charge 3 where F 31 is the force on Q3 due to Q1 and F 32 is the force on Q3 due to Q2? a) b) c) d) +-+ Q1 Q2 Q3 3 F 31 F F 31 F 32 F 31 F 32 F 31 F 32
Charles Allison © The Electric Field Gravitational Field + -e Electric Field –Units N/C –Direction of E is the direction a + test charge would go
Charles Allison © 2000 The electric field is defined as the force on a small charge, divided by the magnitude of the charge: 21-6 The Electric Field
Charles Allison © 2000 For a point charge: 21-6 The Electric Field ε 0 is the permittivity of the free space=8.85x C 2 /N.m 2
Charles Allison © 2000 Electric Field: point charge If we have a charge (or a system of charges) we can ask ourselves what the electric field is at any point in space, P, a distance r from the charge. -e P r Units: N/C +e P r
Charles Allison © 2000 Force on a point charge in an electric field: 21-6 The Electric Field
Charles Allison © 2000 Electric Field: system of charges If we have a system of charges we can ask ourselves what the electric field is at any point in space, P. In this case we find the Electric field due to each charge in the system at at that point, P, and we do a vector sum of these fields. q1 P r3r3 r1r1 q2 q3 r2r2
Charles Allison © 2000 Electric Field: Two Charges We have two charges q1 = +7.0 µC and q2 = -8.0 µC a distance of 0.50 m to the right of q1. What is the electric field at a distance of 0.30 m to the right of q2? q1 P q2 r=0.5m r=0.30m k = 8.99x10 +9 Nm 2 /C 2 = coulomb’s constant
Charles Allison © The Electric Field Example 21-7: E at a point between two charges. Two point charges are separated by a distance of 10.0 cm. One has a charge of -25 μC and the other +50 μC. (a) Determine the direction and magnitude of the electric field at a point P between the two charges that is 2.0 cm from the negative charge. (b) If an electron (mass = 9.11 x kg) is placed at rest at P and then released, what will be its initial acceleration (direction and magnitude)?
Chapter 19 Electric Potential Energy and the Electric Potential.
Electric Forces, Fields, Potential and Energy. Fundamental Charge: The charge on one electron. e = 1.6 x C Unit of charge is a Coulomb (C)
SPH4UI Electric Potential Mr. Burns Electricity has Energy To separate negative and positive charges from each other, work must be done against the force.
Chapter 21: The Electric Field I: Discrete Charge Distributions Section 21-1: Charge.
Coulomb law Electric Fields of Force The Force of Electric charges are determined by the type of charge of the objects. unlike charges attract like charges.
P30 Unit B – Forces and Fields Electric Field Theory (Looks pretty cool, not an electric field.)
6.3 Vectors in the plane Day 1 Objectives: - define vectors - identify component form of a vector - calculate the magnitude of a vector Warm Up Find the.
Electric Potential Physics 2102 Gabriela González Physics 2102.
Motion of Charged Particles in a Uniform Electric Field Montwood High School AP Physics C R. Casao.
Electricity & Magnetism Lecture 5: Electric Fields and Field Lines.
Chapter 23 Electric Fields. Quick Quiz 23.1 If you rub an inflated balloon against your hair, the two materials attract each other, as shown in this figure.
Chapter 25 Electric Potential. Quick Quiz 25.1 In the figure below, two points A and B are located within a region in which there is an electric field.
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Chapter 17: Electric Forces and Fields.
Electric Potential, Energy, and Capacitance Objective: TSW understand, transfer and apply energy concepts to electric fields and charges by solving problems.
J. Pulickeel November 2008 SPH 3U1. Contents of this Presentation In this presentation we will learn What are Electric Force Fields? What are the properties.
Electrical Potential Electrical Potential Energy Electrical Potential Equipotential Surfaces Potential Due to an Electrical Field Potential Due to a Point.
Here we have an apple that is at a height h above the Earths surface.
Uniform Electric Fields Electric Fields Content Concept of an electric field Force between point charges Electric field of a point charge Uniform electric.
Linear Momentum For an individual mass we define the linear momentum to be: From the 2 nd law we have: This is actually how Newton originally formulated.
An insulating sphere of radius b has a spherical cavity of radius a located within its volume and centered a distance R from the center of the sphere.
Two protons, each of charge 1.6 x C are 2 x m apart. What is the change in potential energy if they are brought m closer together?
Relative Velocity and Relative Acceleration The measured speed of an object depends upon the observers reference frame. - The speed of a car measured by.
MAY THE FLUX BE WITH YOU Gausss Law 3.2 Is that the finger???
Electric Charge & Electric Field Chapter 16. According to atomic theory, electric forces between atoms and molecules hold them together to form the liquids.
Chapter 32 final exam review Charge originates from protons and electrons in atoms. Electric force—caused by interactions between charges. F = k q 1 q.
5.1 Electric Forces & Fields Chapter 18. The Origins of Electricity In the mid 18 th century Ben Franklin created the idea of positive and negative electric.
Chapter 26 - Electric Field A PowerPoint Presentation by Paul E. Tippens, Professor of Physics Southern Polytechnic State University © 2007.
SO FAR WE HAVE DEALT WITH TWO KINDS OF POTENTIAL ENERGY: GRAVITATIONAL (U=MGH) ELASTIC (U=1/2KX 2 ) SOMETIMES IT IS MORE HELPFUL WHEN YOU HAVE POTENTIAL.
Electrical Energy, Potential and Capacitance AP Physics B.
© 2016 SlidePlayer.com Inc. All rights reserved.