Magnetism

What is the term for materials that can be magnetized?

• Paramagnetic materials

• Diamagnetic materials

• Ferromagnetic materials

• Superparamagnetic materials

What type of field does the Earth produce?

• Electric field

• Gravitational field

• Magnetic field

• Radiation field

What do iron filings show when placed near magnets with opposite poles facing each other?

• They align along the magnetic field lines, demonstrating attraction.

• They repel each other and scatter randomly.

• They form a solid block between the magnets.

• They create a loud noise when they touch.

What is a permanent magnet?

• A material that produces a magnetic field without any external magnetic field being present.

• A type of magnet that only works when electricity is applied.

• A magnet that can be turned on and off at will.

• A temporary magnet that loses its magnetism quickly.

What is the principle behind how a compass works?

• A compass aligns itself with the Earth's magnetic field.

• A compass uses solar energy to function.

• A compass operates based on gravitational pull.

• A compass is influenced by the Earth's rotation.

What happens when a north pole and a south pole of two magnets face each other?

• They repel each other.

• They attract each other.

• They create a magnetic field.

• They have no effect on each other.

What is the result of placing two like poles of magnets together?

• They attract each other.

• They repel each other.

• They create a magnetic field.

• They have no effect on each other.

What happens to the magnetic field when an electric current flows through a wire?

• A magnetic field is generated around the wire.

• The magnetic field disappears completely.

• The magnetic field becomes weaker.

• The magnetic field only exists at high voltages.

What is magnetic field strength measured in?

• Newton (N)

• Joule (J)

• Tesla (T)

• Ampere (A)

What is a key feature of electromagnets?

• They can be turned on and off.

• They are always magnetic.

• They can only attract metals.

• They require a permanent magnet to function.