Magnetism and Its Applications

What is a common feature of all magnets, regardless of their shape or size?

• They are always circular.

• They have two magnetic poles.

• They can only attract iron.

• They have a single magnetic pole.

What happens when the North Pole of one magnet is placed near the North Pole of another magnet?

• They attract each other.

• They repel each other.

• They become neutral.

• They lose their magnetism.

What is the primary reason Earth acts like a giant magnet?

• The motion of the Earth's inner core.

• The Earth's rotation.

• The presence of water on Earth.

• The Earth's atmosphere.

Which planet in our solar system has a magnetic field 10 times greater than Earth's?

• Mars

• Mercury

• Venus

• Jupiter

Which of the following materials is most likely to be ferromagnetic?

• Plastic

• Wood

• Iron

• Glass

How can a non-magnetized material be turned into a magnet?

• By cooling it rapidly.

• By placing it in a strong magnetic field.

• By heating it to a high temperature.

• By exposing it to sunlight.

What happens to a magnet if it is cut in half?

• It loses its magnetism.

• It becomes two smaller magnets, each with a North and South Pole.

• It becomes a single pole magnet.

• It becomes non-magnetic.

What is a solenoid?

• A device that measures magnetic fields.

• A type of permanent magnet.

• A coil of wire carrying an electric current.

• A material that cannot be magnetized.

What is the process called when a magnetic field induces an electric current in a wire?

• Electromagnetic induction

• Magnetic reflection

• Magnetic resonance

• Electric conduction

What is the relationship between electricity and magnetism called?

• Electromagnetism

• Electrodynamics

• Magnetostatics

• Electrostatics