Electricity

• How does electricity move?

  The flow of electrons Negative to positive side of battery
• Insulators


  Doesn't allow electricity to pass through e.g. plastic, rubber ✏️ , diamond 💎 , dry wood 🪵
• Conductors


  Allows electricity to pass through e.g copper, gold, silver, sea water
• Electrical circuit


  Copper loop allowing electricity to flow
• strength of current


  Ammeter - amps
• Strength of voltage

  Voltmeter - volts
• Resistor

  Slows down current
• Resistance


  Ohmmeter - ohms
• Diode


  Allows current to pass in one direction
• LED


  Allows current to pass in one direction and emits light
• LDR (light dependant resistor)


  Resistance changes due to light intensity e.g streetlights
• Series


  Continuous loop of electricity all components on same current flow
• Parallel


  All components on different current loops
• Ohm's Law


  V=IR
• Power Law

  P(watt) [POWER]= I(Amp) [CURRENT] x V(Volt) [VOLTAGE]
• Electrical Current


  the flow of electrons
• Thermistor

  resistance decreases with heat
• potential difference is measured with a voltmeter
• resistance is measured using an ohmmeter
• Power = work / time