Magnets & Magnetic Force

What is the relationship between electricity and magnetism?

• Electricity can create a magnetic field, and a changing magnetic field can induce an electric current.

• Electricity and magnetism are completely unrelated phenomena.

• Magnetism can only exist in the absence of electricity.

• Electricity can only flow in a magnetic field without any interaction.

What happens when like poles of magnets are brought together?

• They attract each other.

• They repel each other.

• They create a magnetic field.

• They become neutral.

What materials can be attracted to magnets?

• Metals such as iron, nickel, and cobalt.

• Plastics and rubber.

• Wood and paper.

• Glass and ceramics.

What is a magnetic field line?

• Imaginary lines that represent the strength and direction of a magnetic field.

• Physical lines that show the path of magnetic force.

• Solid lines that indicate the presence of magnetic materials.

• Curved lines that depict the flow of electric current.

What is the role of magnetic fields in electric motors?

• Magnetic fields are used to store energy.

• Magnetic fields interact with electric currents to produce motion.

• Magnetic fields are only present in generators.

• Magnetic fields prevent electric currents from flowing.

What is magnetic force?

• The attraction or repulsion that arises between electrically charged particles due to their motion.

• A type of force that only attracts objects with mass.

• A force that acts at a distance without any physical contact.

• The force that causes objects to float in the air.

What is the difference between a magnet and a magnetic material?

• A magnet can be turned on and off, while a magnetic material cannot.

• A magnet produces its own magnetic field, while a magnetic material can become magnetized in the presence of a magnetic field.

• A magnet is always made of iron, while a magnetic material can be made of any metal.

• A magnet attracts all materials, while a magnetic material only attracts certain metals.

What happens when opposite poles of magnets are brought together?

• They repel each other.

• They attract each other.

• They create a magnetic field.

• They lose their magnetism.

What is the Earth's magnetic field useful for?

• Deflecting the solar wind, charged particles that come from the Sun.

• Generating electricity in power plants.

• Creating weather patterns in the atmosphere.

• Guiding migratory birds during their travels.

What characteristics do magnetic substances have?

• They can push or pull objects without touching them.

• They can only attract other magnetic substances when in contact.

• They can generate electricity when moved through a magnetic field.

• They can only exist in solid form.