Electromagnetism Revision

...... is the interaction between electricity and magnetism

• Ferromagnetism

• Electromagnetism

• Magnetic Domains

• Generators

Why does the compass deflect in oersted experiment?

• Because it responds to the magnetic field of Earth

• Because it responds to the magnetic field of the wire carrying current

• Because it responds to its own magnetic field

Simple electromagnets are made up of .......

• Coiled wire

• magnetic material

• Energy source

• All the choices are correct

From the uses of the electromagnets is to ......

• Convert electrical to mechanical energy

• Maglev train

• generate electricity

• Convert mechanical to electrical energy

Which of the following is from the advantages of the electromagnets over the other types of magnet?

• It can be very powerful magnets due to electricity

• It’s effect last forever

• It can attract iron things

• All the choices are correct

How can you increase the magnetism of a wire carrying current from a battery?

• By adding more coils to wire

• By using stronger magnet

• By making magnet faster

• All the choices are correct

How can you increase the magnetism of an electric current from a battery?

• Add iron nail

• More Coils to the wire

• More voltage to the battery

• All the choices are correct

Motors change ........ to ..... energy

• Mechanical to electrical energy

• Thermal to electrical energy

• Electrical to thermal energy

• Electrical to mechanical energy

Motors change ........ to ..... energy

• Mechanical to electrical energy

• Thermal to electrical energy

• Electrical to thermal energy

• Electrical to mechanical energy

What is the main function of motors?

• Generate electricity

• Change from electrical to thermal

• Operate any device

• All the choices are correct