Term 3 Week 5 2016

Term 3 Week 5 2016

Homework

• Ex 6A, p. 188-196, Electric Fields
• Ex 6B, p. 200-201, Resistance, Charge, Power
• Ex 6C, p. 205-214, Series & Parallel D.C. Circuits

PhET D.C. Circuit Construction Kit

This applet will let you construct and measure any D.C. Circuit

Use it to model some of your complicated circuit questions

Power in Series and Parallel Circuits

Ohm's Law - Part 1

Ohm's Law - Part 2

Transistors & Diodes How They Work

Term 3 Week 4 2016

Term 3 Week 4 2016

Homework

• Ex 6A, p. 188-196, Electric Fields
• Ex 6B, p. 200-201, Resistance, Charge, Power

Electrical Current

Current is the rate of flow of charge

I = Δq/Δt

Voltage

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

Ohm's Law & Resistance

Series and Parallel Resistors

Power

Term 3 Week 3 2016

Term 3 Week 3 2016

Homework

• Ex 6A, p. 188-196, Electric Fields

Millikan's Oil Drop Experiment

• An oil drop balanced between the plates has a net force of zero
• thus the gravitational weight force is equal and opposite to the electric force
• thus mg = Eq and the charge on the oil drop can be calculated

Term 3 Week 2 2016

Term 3 Week 2 2016

Homework

• Ex 6A, p. 188-196, Electric Fields

Using Electric Fields to Treat Cancer

Electrical Vocabulary

Term 3 Week 1 2016

Term 3 Week 1 2016

Homework

• Ex 6A, p. 188-196, Electric Fields

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

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