Exploring the Science of Magnets and Electromagnetism

What is a fundamental difference between electricity and magnetism?

• Electricity has both positive and negative charges, while magnetism has only one type of pole.

• Electricity can exist without magnetism, but magnetism cannot exist without electricity.

• Electricity and magnetism are completely unrelated phenomena.

• Electricity has either a positive or negative charge, while magnetism always has both a North and South Pole.

What happens if you cut a bar magnet in half?

• The magnet loses its magnetic properties.

• You get two magnets, each with a North and South Pole.

• You get two magnets, each with only a South Pole.

• You get two magnets, each with only a North Pole.

What is the main difference between a magnet and a non-magnet at the molecular level?

• Magnets have only North Poles, while non-magnets have only South Poles.

• Magnets have more atoms than non-magnets.

• In magnets, the molecules are neatly arranged with aligned poles, while in non-magnets, the molecules are jumbled.

• Non-magnets have no poles at all.

What do field lines in an electric field indicate?

• The direction a negative charge would travel.

• The direction a positive charge would travel.

• The strength of the electric field.

• The location of the magnetic poles.

In a magnetic field, which direction do the field lines point?

• Away from South Poles and toward North Poles.

• Away from North Poles and toward South Poles.

• In a circular pattern around the magnet.

• Randomly in all directions.

What does the North Pole of a compass actually point towards?

• The Earth's magnetic North Pole.

• The Earth's magnetic South Pole.

• The Earth's geographic North Pole.

• The Sun.

What is electromagnetism?

• The study of electric fields only.

• The concept that electricity creates magnetism and vice versa.

• The idea that electricity and magnetism are completely separate phenomena.

• The study of magnetic fields only.

What does the right-hand rule help you determine?

• The direction of the magnetic field around a current-carrying wire.

• The strength of the magnetic field.

• The direction of electric current.

• The polarity of a magnet.

How can you increase the strength of an electromagnet?

• By increasing the number of wire loops and adding a magnetizable core.

• By using a single loop of wire.

• By decreasing the current flow.

• By using a non-magnetizable core.

What happens when you place a magnetizable material inside an electromagnet?

• The magnetic field remains the same.

• The electromagnet stops working.

• The magnetic field weakens.

• The magnetic field strengthens.