Practice Question

1.Describe what is meant by the term a generator effect

The generator effect is a term used to explain an induced potential difference across the ends of a conductor (wire) when either of the following occurs:

1.An electrical conductor (wire) moves relative to a magnetic field.

2. A change in the magnetic field around a conductor

2. State two ways that the generator effect can occur

1.An electrical conductor (wire) moves relative to a magnetic field. This can be moving the wire in a magnetic field, or moving a magnet through a coil of wire

2. A change in the magnetic field around a conductor. This is achieved my moving a magnet through a coil of wire, because the magnetic field around the coil changes as the magnet moves.

3. List three factors that affect the size of the induced voltage.

1. Faster the  movement of the conductor or magnet, the greater rate of change in magnetic field. This increases the size of the induced potential difference or current.

2.A stronger magnetic field produces a larger induced voltage because more magnetic field lines are being cut.

3.More turns (loops) of wire then more area for the magnetic field to pass through. The induced voltage is proportional to the number of turns. If there are more turns, then there is a greater induced potential diffference or current.

4.The longer the wire exposed to the magnetic field, the more field lines are cut, so the greater the induced voltage or current.

5.The maximum voltage is induced when the wire cuts the magnetic field at 90° (perpendicular). If the wire moves parallel to the field, no voltage is induced.