Electromagnetic induction

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

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

• A magnet

• A gravitational force

• A moving magnet

• Friction

Who discovered electromagnetic induction?

• Isaac Newton

• Hans Oersted

• Michael Faraday

• Benjamin Franklin

 When was electromagnetism discovered?

• 1731

• 2031

• 1931

• 1831

 Electromagnetism is when

• magnetism causes electricity

• electricity and magnetism cancel each other out

• a strong magnet creates a permanent magnet

A dynamo is an electrical generator that creates direct current using a commutator.

• True

• False

how many ways are there to increase the e.m.f induced in a coil or wire?

• 3

• 2

• 1

Alternating current flows back and forth

• false

• true

Direct current cannot flow in one direction

• true

• false

when the coil and magnetic field move relative to each other, a current flows in the coil if it is a part of an incomplete circuit

• True

• False