The Generator Effect

• The induction of a potential difference in a wire which is moving relative to a magnetic field or experiencing a change in magnetic field
• The generator creates a potential difference in a conductor, and a current if the conductor is part of a complete circuit
• This can be done by moving a magnet in a coil if wire or moving a conductor in a magnetic field. Shifting the magnet from side to side causes a blip in the current. If you move the magnet or conductor in the opposite direction, then the p.d or current will be reversed
• If you keep the magnet moving backwards and forward, you produce a potential difference which keeps swapping direction, an alternating current
• • As you turn a magnet, the magnetic field through the coil changes. This change induces a potential difference, which makes current flow
  • When you’ve turned the magnet through half a turn, the direction of the magnetic field through the coil reverses. When this happens, the potential difference reverses so the current flows in the opposite direction
  • If you keep the magnet turning in the same direction, the p.d will keep reversing every half turn and you get an alternating current
• Induced current

  • Opposes the changes made to it
  • Acts against the change, returning things to the way they were
• You can change the size of the induces potential difference

  • Change the rate the magnetic field is changing
  • Increase the speed of the movement
  • Increasing the strength of the magnetic field