induced potential

• the generator effect is that : if an electrical conductor moves relative to a magnetic field or if there is a change in the magnetic field around a conductor, a potential difference is induced across the ends of the conductor
• in the generator effect, if the conductor is a part of a complete circuit, the potential difference means a current is induced in the conductor
• the generator effect is the opposite of the motor effect. Instead of using electricity to create motion, motion is used to create electricity
• the generator effect occurs when a wire cuts through magnetic field lines
• the generator effect is also known as electromagnetic induction
• whenever the wire stops moving in the generator effect, the potential difference disappears because it is the change in the magnetic field that the wire experiences as it moves through it, and movement through the magnetic field that induces a potential difference in the wire
• the direction of the potential difference swaps each time the direction of movement is changed
• moving a wire through a fixed magnetic field:

  • the electrical conductor cuts through the field lines, and experiences a change in the magnetic field which allows for electromagnetic induction
  • and this induces a potential difference in the wire
• moving magnets relative to a fixed conductor:

  • as the magnets moves, the wire experiences a change in the magnetic field, which leads to electromagnetic induction and a potential difference in the wire
• to change the size of the the induced potential:

  • increasing the strength of the magnetic field by using stronger magnets leads to a larger potential difference
  • moving the magnets or wire more quickly means the magnetic field will change faster leading to a bigger potential difference
  • shaping the wire in a coil, and more turns means a bigger potential difference