Week 11 Term 2 2026 DC Electricity

 Homework:

Electric Fields

• Act 17A, p.192-194, Electric Fields
• Ex 6A, p.188-196, Static Electric Fields

DC Electric Circuits

• Act 18A, p.201 Intro DC Electricity
• Act 18B, p.207 Simpler Equivalent Circuits
• Act 18C, p.209 Potential Dividers
• Act 18D, p.211-213 Using Ohm's Law
• Ex 6B, p.200-201 Voltage and Current
• Ex 6C, p.205-214 D.C. Circuits

Current

Current is the rate of flow of Charge

I = Δq/Δt

Current

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

Circuit Symbols

Ohm's Law

Ohm's Law PhET application

D.C. Circuit Construction Kit PhET Application

D.C. Circuit Lab PhET Application

Ohm's Law

Series & Parallel Circuits

Series & Parallel Circuits

Electric Power

P = IV

P = I2R  ← using Ohm’s Law V=IR substitution

P = V2/R←using Ohm’s Law I=V/R substitution

Week 9 Term 2 2026 Electric Fields, Electric Force, Electric Potential Energy

 Homework:

Electric Fields

• Act 17A, p.192-194, Electric Fields
• Ex 6A, p.188-196, Static Electric Fields

PhET - Charge & Electric Fields - App

Basics of Electric Charge

Definition of an Electric Field:

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

A positive charge will feel a force with the electric field direction

A negative charge will feel a force against the electric field direction

Fe = Eq

Electric Field

Electric Potential (Voltage)

What is Voltage?

Uniform Electric Field

E = V/d

Uniform Electric Fields

Uniform Electric Fields, Derivation of E=V/d

Charges in Uniform Electric Fields: Forces & Acceleration

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 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

Electron Gun

Cathode Ray Tube (CRT)

Discovery of the Electron: Cathode Ray Tube Experiment

Cathode Rays Leads to Thomson's Model of the Atom

Parker Solar Probe - Use of CRT

Millikan's Oil Drop Experiment

Charge of an Electron - Millikan's Oil Drop Experiment

Week 6 Term 2 2026 Nuclear Reactions

 Homework

Models of the Atom & Radioactivity

• Act 15A, p.173-176 Models of the Atom and Radioactivity
• Ex 5A, p. 151-155 Models of the Atom
• Ex 5B, p.160-171 Radioactivity

Nuclaer Reactions

• Act 16A, p. 181, Nuclear Reactions
• Ex 5C, p.175-182 Nuclear Reactions

Nuclear Reactions:

• Conservation of Atomic Number
• Conservation of Nucleon Number
• Conservation of Mass-Energy E = Δmc2

E = Δmc2

Nuclear Fusion in the Sun

Binding Energy comes from the change in mass from individual nucleons to being combined into a nucleus. This is energy lost by the nucleons joined together in a nucleus and must be returned in order to separate the nucleons

E = Δmc2

Element formation in Stars Nuclear Fusion

Binding Energy Per Nucleon

Mass Per Nucleon

A 'cheatsheet' on Binding Energy in nuclear physics

Binding Energy - A-level Physics

Nuclear Reactions

Fission Fusion and Radioactive Decay

Fission & Fusion

Natural Nuclear Fission Reactor

Week 4 Term 2 2026 Models of the Atom

 Homework

• Act 15A, p.173-176 Models of the Atom and Radioactivity
• Ex 5A, p. 151-155 Models of the Atom
• Ex 5B, p.160-171 Radioactivity

Study Pass Models of the Atom

Models of the Atom

History of the Atom

Models of the Atom Timeline

Discovery of the Electron: Cathode Ray Tube Experiment

Discovery of the Nucleus: Rutherford's Gold Foil Experiment

Charge of an Electron: Millikan's Oil Drop Experiment

Atomic Structure: Discovery of the Neutron

Parts of the Atom

Isotopes

Isotopes are versions of an atom or an element that have the same number of protons, but different numbers of neutrons

What are Isotopes?

Radioactive Decay

Alpha, Beta & Gamma Radiation

• Alpha particles are emitted by a larger nucleus that has too many Protons
• Beta particles are emitted by a nucleus that has too many Neutrons
• Gamma photons are emitted by a nucleus that has too much Energy (is in an exited state)

• PhET Alpha Decay app can be found here
• PhET Beta Decay app can be found here

Alpha Decay

Beta Decay

Radiation

Types of Radiation

Stable and Unstable Nuclei | Radioactivity | Physics | FuseSchool

Is radiation dangerous?

The Most Radioactive Places on Earth

Millisieverts and Radiation - Sixty Symbols

Half life | Radioactivity | Physics | FuseSchool

Half Life Calculations

Not all your Atoms are Stardust