Electrical Induction

Electromagnetic Induction

We know an electric current can be induced by a magnetic field

• Is it possible to do the reverse?

• Is it possible to use a magnetic field to generate an electric current?

• Answer: Yes!

Electromangetic induction

• Electromagnetic induction is the process of inducing a current in a circuit by changing the magnetic field that passes through the circuit

• In electromagnetic induction, a changing magnetic field induces a current

Michael Faraday

British scientist, 1791-1867

Multiple Choice

Electromagnetic induction is...

• The process in which a current produces a magnetic field

• The process in which a changing magnetic field generates electricity

• The process in which electricity is produced by connecting wires to a battery

• The process in which lightning strikes a building

Multiple Choice

Which of the following will generate a current in a loop?

• A magnet

• A gravitational force

• A moving magnet

• Friction

Multiple Choice

Who discovered electromagnetic induction?

• Isaac Newton

• Benjamin Franklin

• Hans Oersted

• Michael Faraday