Class Notes (836,517)
Canada (509,851)
Physics (324)
PHYS 102 (44)
Lecture

January 8.doc

7 Pages
105 Views
Unlock Document

Department
Physics
Course
PHYS 102
Professor
Zaven Altounian
Semester
Winter

Description
Phys 102 Alanna Houston January 8, 2008 - The magnitude of force is given by Coulomb’s Law: F = kQ1Q2/r^2 - Force is a vector - The magnitude is always a positive quantity. Do not use signs of the charges in this equation when calculating the magnitude of the force - The direction of the force is determined from “like charges repel and unlike charges attract.” - Example: Two fixed charges. Q1 = 3x10^-6 C and Q2 = -6x10^-6 C are separated by 3 m. Find the electric force (magnitude and direction) acting on Q1. o o To find the direction of the force, use: like charges repel and unlike charges attract o To find magnitude, use coulomb’s law: o o Do not include the signs of the charges when using Coulomb’s Law o What is the force acting on Q2? o The magnitude of F2 is 1.8x10^-2 N o The direction F2 is toward Q1 - If the charges are free, they will move toward each other Phys 102 Alanna Houston - - - The electrical force is much stronger than the gravitational force for atomic particles. Fg is neglected for such particles - What happens when there are more than two charges present? How is Coulomb’s law applied? o Use the superposition principle: The electric force on a given charge is the vector sum of the electric forces due to each charge Phys 102 Alanna Houston o - Example: Find the electric force acting on Q3
More Less

Related notes for PHYS 102

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit