Electricity

• Rational agents will select the choice which presents the highest benefits
• Demand curve shifting right

  Increases the equilibrium price and quantity
• Negatively-Charged objects

  Contain more electrons (e-) than protons (p+)
• Groups assumed to act rationally

  • Consumers
  • Producers
  • Workers
  • Governments
• Objects acquire an imbalance of the two types of charges by gaining or losing electrons
• Substances that can attract nearby substances

  • amber
• Atoms are the basic building blocks of all matter. They can combine with other atoms to form molecules but cannot be divided into smaller parts by ordinary chemical processes
• Opening Prayer: 'Dear Lord, thank You for today. Thank You for ways in which You provide for us all. For Your protection and love, we thank You. Help us focus our hearts and minds now on what we are about to learn. Inspire us by Your Holy Spirit as we listen and write. Guide us by Your eternal light as we discover more about the things around us. We ask this in Jesus’ name. Miriam of Nazareth, Teach us Your ways and lead us to Jesus. Amen.'
• Conservation of Electric Charge: When two different objects are rubbed against each other
• The Wealth of Nations was written in 1776
• As early as 600 B.C., the Greeks were aware that amber when rubbed vigorously with a piece of cloth, can attract nearby objects


  600 B.C.
• Charged vs. Uncharged

  Uncharged objects have a balance of the two charges, protons and electrons (# of p⁺ = # of e⁻). Charged objects have an imbalance of the two types of charges (# of p⁺ ≠ # of e⁻)
• A firm increases advertising

  Demand curve shifts right
• Electrostatic Law: Like charges repel, unlike charges attract
• Later, it was shown that any object when rubbed against another object, could attract small particles of matter. The object is said to be electrified or have acquired a charge. This charge is at rest, so it is called static electricity
• The atom/object is neutral when # of p⁺ = # of e⁻
• Electron theory


  Explains the existence of charges in an atom
• William Gilbert (1600) found out that many other substances when rubbed against another substance, can attract nearby substances. He called these substances electrics, from the Greek word elektron which means “amber”
• Rational


  (in classical economic theory) economic agents are able to consider the outcome of their choices and recognise the net benefits of each one
• Rationality in classical economic theory is a flawed assumption as people usually don't act rationally
• Marginal utility is the additional utility (satisfaction) gained from the consumption of an additional product. If you add it up for each unit you get total utility
• Neutral objects become negatively-charged by gaining electrons and positively-charged by losing electrons
• Positively-Charged objects

  Contain more protons (p+) than electrons (e-)
• Conductors

  1. Materials that resist the flow of charges

  2. Materials that allow charges to flow easily
• #QOTD: '6 7 8'
• Electric Scavenger Hunt

  Pair Work: Look for materials in the classroom that are conductors and insulators
• Closing Prayer!
• Superconductors


  Offers no resistance to the flow of charges below certain temperatures
• Types of materials

  • Conductors
  • Insulators
  • Semiconductors
  • Superconductors
• Insulators


  Materials that do not allow charges to flow easily
• Conservation of Electric Charge:
• Like charges repel, unlike charges attract
• Quick Check: