{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Class5HO

# Class5HO - Class 5 Electric Fields and Electric Potentials...

This preview shows pages 1–13. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Class 5 Electric Fields and Electric Potentials Physics 106 Fall 2011 Press CTRL-L to view as a slide show. Learning Outcomes You should know the following items from the last lesson: I The electric field is defined by E = F / q I The electric field points in the direction of the force on a small positive test charge I The electric field can be described by electric field lines I The electric field vector, ~ E , is tangent to the electric field lines at each point I Field lines are closer together where the field is stronger I Be able to draw the electric fields of simple arrangements of charges. I Know the characteristics of electric fields near conductors I Work standard problems involving the electric field. Learning Outcomes Today we will consider: I What is the electric potential? I How are the electric field and the electric potential related? I How can we find the electric field and the electric potential? I How are electric fields and electric potentials used in practical applications? I The elecric potential is the potential energy divided by the charge I The electric potential is also called the voltage I Applying fields to a CRT Electric Field Line Patterns I Point charge I The lines radiate equally in all directions I For a positive source charge, the lines will radiate outward Note how the lines naturally get farther apart at larger distances from the source. Electric Field Line Patterns I For a negative source charge, the lines will point inward Electric Field Line Patterns I All the lines start on positive charges and end on negative charges. I The electric field is strong between the charges. I The field is weak far from the charges. Electric Field Line Patterns I Far from the charges, the field looks like one charge of 2q. I The field is weak between the charges. Conductors in Electrostatic Equilibrium I E inside is zero I Charge moves to the surface I E is perpendicular to the surface I Charge collects at pointed spots and the field is larger there Electric Fields of Objects E Fields of Selected Objects In some very special cases we can use symmetry to help find electric fields. Electric Field of a Point Charge Coulomb’s law tells us: E = k e Q r 2 E = Q 4 π r 2 Electric Field of a Charged Sphere The electrical field outside a uniformly charged spherical shell is the same as that of a point charge....
View Full Document

{[ snackBarMessage ]}

### Page1 / 60

Class5HO - Class 5 Electric Fields and Electric Potentials...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online