Electricity

• Flow of electrons
• Electrons flow from the negative pole to the positive pole
• Current - flow of electrons
• Resistance - opposition to current flow
• Ammeter - used to measure current
• Conductor - allow current electricity to flow
• Plastic is an insulator - doesn’t allow current tof low through
• Resistance- Reduces the movement of electrons - Ohmmeter - ohms

  fixed resistor - One value of resistance

  variable resistance - resistance changes
• Voltage - gives energy to electrons
• Potential difference (pd) - voltage across two points on a circuit
• Power - V x I
• Ohms law the relationship between current and volatge is directly proportional- straight line/ as one increases the other does to
• V I R triangle
• R - V divide by I
• Power the rate at which one type of energy is transferred to another - WATTs (W) W = V x I
• Insulator - materials that do not allow electricity to flow through them easily