Static Electricity

Electricity - 10SCIE

Finn Le Sueur

2024

Akoranga 1 Mahi Tuatahi

  1. Collect a whiteboard from the front
  2. In pairs, brainstorm things you think you know about electricity
  3. Anything at all!
  1. Title a new page ELECTRICITY
  2. Glue in the learning outcomes/ngā whāinga ako sheet
  3. Write the date in your book
  4. Write the learning outcome for today:
    • Explain how static electricity is created by the removal or addition of electric charge.

Electricity as a Job

Electricity for Fun

Electricity as Danger

Van der Graaf Generator

Source
  • The dome builds up a charge, and this can be used to do all kinds of interesting things
  • The wand is used to complete the circuit and to stop charge building up
  • Key: Opposites attract and likes repel

Tinfoil Pie Containers

  • Pātai: Why do they not fly off straight away?
  • Whakatika: Because the circuit is complete; no charge building up.
  • Pātai: What will happen when the circuit is broken?
  • Whakatika: Positive charge begins to build up on the dome, so the tinfoil pie contains repel each other.
Source

Lightning

  • Pātai: What is happening when the circuit is not complete?
  • Whakatika: Charge is building up in the dome
  • Pātai: Why does lightning occur?
  • Whakatika: Because the charges want to balance out.
Source

Van der Graaf Generator Explained

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Akoranga 2 Mahi Tuatahi

  1. Collect a whiteboard from the front
  2. In pairs, draw and label a diagram of an atom!

Te Whāinga Ako

  1. Explain how static electricity is created by the removal or addition of electric charge.

Write the date and te whāinga ako in your book

Atomic Structure

  • Nucleus: The centre of the atom (strongly held: protons, neutrons)
  • Orbit: Loosely held electrons orbit around the nucleus
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Removing/Adding Charge

  • The nucleus is strongly held and is positively charged because it contains protons which have a positive charge.
  • Neutrons have no charge (neutral)
  • The electrons are loosely held, and are negatively charged.
  • Electrons can be removed from a material via friction
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Pātai: Why can’t protons (positive charge) be removed?

Discuss with the person next to you!

Whakatika

  • Protons are in the nucleus which is strongly held
  • The nucleus is the core of what makes up matter
  • Therefore, we can more easily remove the loosely held electrons
  • To remove the protons is to change what the matter is
Source

Static Electricity

An imbalance of charge on the surface of, or inside a material. Imbalances in charge will always attempt to balance out (become neutral), by having charges move.

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Electrostatic Induction

  • Bringing a charged object near a neutral one can induce a localised opposite charge. Therefore, creating attraction between the two objects
  • Make a note of this diagram and notes in your book.
  • Explain how you can use an electroscope to determine whether an object is charged or not.
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