Electromagnetism

Explain the direction that the coil will rotate inside the magnetic field, when a d.c. current is flowing in the coil?

What happens if the number of turns on the primary is greater than that of the secondary?

What is the name given to a transformer where the secondary voltage is less than the primary voltage?

What is the name given to a transformer where the primary voltage is less than the secondary voltage?

If a voltage between a primary to secondary coil increases what happens to the current?

Why do step down transformers have thin primary coil wires but thick secondary coil wires?

What is a magnetic field?

How do we represent the magnetic field?

What ways do the arrows always point on field lines?

Explain the generation of electricity using a magnet and a coil?

What happens when a magnet causes current to flow in wires?

How is the induced current increased with a magnet and wire?

Moving a wire through a magnetic field has a voltage induced which in turn causes what to be induced?

How can the induced current in a wire through a magnetic field be increased?

How do we determine the direction in which the current will flow in the wire?

Which finger represents what in Fleming's right hand rule?

How is the current in a generator supplied to an external circuit?

Why is an alternating current generated?

What rule do we use for motors?