Term 3 Week 2 2019

Homework

• Ex 6A, p. 188-196, Static Electric Fields F=Eq, E=V/d, Ep=Vq & Ep=Eqd

Definition of an Electric Field:

“Any region of space where a charge feels a force.”

Electric field lines are generated by charges. The closer the field lines are together, the stronger the electric field

PhET simulation of Charges, Force and Electric Field lines

Uniform Electric Field

E = V/d

E: Electric Field (Vm-1 or NC-1 depending on the context used)

Electric Force

Fe = Eq

Fe: Electrical Force (N)

q or Q: Charge (C)

Electrical Charge

Voltage (Potential Difference)

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

Voltage (Potential Difference)

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

V = ΔE/Q

Electrical Potential Energy

As the charge falls through the Electric Field, the electrical potential energy transforms into kinetic energy.

Ek = Ep

½ mv2 = Vq

Electron Gun

(Cathode Ray Tube)

A Tube Screen TV is an Electron Gun

Cathode Ray Tube and how it works