Log in
HomeClass Notes1,200,000CA670,000

PHYS 102 Lecture 1: chapter 16 electric force electric field

23 views1 pages
Verified Note
School
McGill University
Department
Physics
Course
PHYS 102
Professor
Nikolaos Provatas

For unlimited access to Class Notes, a Class+ subscription is required.

PHYS 102 verified notes
1/28View all
1

PHYS 102 Lecture 1: chapter 16 electric force electric field

2

PHYS 102 Lecture 2: phys 102 1.10

3

PHYS 102 Lecture Notes - Lecture 3: Electric Field, Test Particle, Field Line

Document Summary

Chapter 16 electric potential and negative charge (electron). There are two types of electric charges in nature;positive charge (proton) An object is positively charged if it has lost electrons. An object is negatively charged if it has gained electrons. Conductors are materials in which electric charge (electrons) can move quite freely. Metals such as copper and aluminum are conductors. Insulators are materials in which electric charge (electrons) are not free to move. Materials such as glass, rubber, and plastic are insulators. semi-conductors have electrical properties between metals and insulators: coulomb"s law state that the electrostatic force between two charged particles separated by a distance r is given by: O is the permitivity of free space and k is the electrostatic constant, q1 and q2are the charges of the two particles and r is the distance between the two charges. Prepared by dr. a. mekki: if the two charges have same signs, there is repulsion between them.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related Documents

PHYS 102 Lecture 2:
byzantiumchimpanzee191
PHYS 102 Chapter Notes - Chapter 16: Electroscope, Electric Charge, Electric Field
erinhorse495
PHYS 102 Chapter Notes - Chapter 16, 17, 19: Field Line, Electric Potential Energy, Electric Potential
periwinklelion814

Related Questions

Two positivecharges (+Q = 1.00 microcoulombs) are heldin position at +,-2.25 centimeters along the x-axis, as shown in the diagram. A thirdpositive charge (+q = 0.05 microcoulombs and m= 6.5micro-kilograms) is free to move along thex-axis.

The magnitude of force between pairs ofcharges is given by F(Q1,Q2)=kQ1Q2/r^2, where the constant k is8.99x10^9 N*(m^2)/(Coulombs^2), Q1 and Q2 are the electric chargesgiven in Coulombs, and r is the distance between Q1 and Q2 given inmeters. Note that when both forces are positive, the forcebetween them is repulsive.

A)Is the motion of the small charge, q, an example of simple harmonicoscillation? Carefully explain why or why not.

B)Assume q<<Q Find the time for q to complete oneoscillation.

Two small spheres of mass m and carrying absolute charge qare
suspended by massless threads of length L, as shown. Thedistance
between the anchor points of the threads is equal to d . Atequilibrium,
the two spheres lie in the same horizontal plane, and the threadseach
make an angle theta with the vertical.

link to graphhttp://i761.photobucket.com/albums/xx259/anu9/Untitled.jpg

1. Assuming the figure is correct and the charges are repelledfrom
each other, choose the best answer below:
(a) Both spheres are positively charged
(b) Both spheres are negatively charged
(c) One sphere is negative and one is positive
(d) Both (a) and (b) are possible
(e) None of the above are possible


3. What is the horizontal distance between the (centers of the)spheres, at equilibrium, in
terms of L, d and/or theta ?

4) (What is the magnitude and direction of the electrostatic forceon the left sphere in
terms of m, g, and/or theta ?

5) What is the value of q in theta C, if d = 30 cm, L = 10 cm,theta = 30°, take g = 10 m/s^2
and k = 9•10^9 (N m^2/C^2), and these are ping-pong balls of mass m= 2.7 grams?


Two small spheres of mass m and carrying absolute charge qare
suspended by massless threads of length L, as shown. Thedistance
between the anchor points of the threads is equal to d . Atequilibrium,
the two spheres lie in the same horizontal plane, and the threadseach
make an angle ? with the vertical.
1. (1 pt) Assuming the figure is correct and the charges arerepelled from
each other, choose the best answer below:
(a) Both spheres are positively charged
(b) Both spheres are negatively charged
(c) One sphere is negative and one is positive
(d) Both (a) and (b) are possible
(e) None of the above are possible
2. (2 pts) Draw a clear free-body diagram for the leftsphere.
3. (1 pt) What is the horizontal distance between the (centers ofthe) spheres, at equilibrium, in
terms of L, d and/or ? ?
4) (3 pts) What is the magnitude and direction of the electrostaticforce on the left sphere in
terms of m, g, and/or ? ?
5) (3 pts) What is the value of q in ?C, if d = 30 cm, L = 10 cm, ?= 30°, take g = 10 m/s2
and k = 9•109 (N m2/C2), and these are ping-pong balls of mass m =2.7 grams?