Understanding Magnetism

The video tutorial explains how magnets can be created and introduces different types of magnetism, focusing on diamagnetism. It describes how diamagnetic materials, like graphene and water, can levitate in strong magnetic fields. The video also touches on the subtleties of magnetism in nitrogen and oxygen and discusses superconductors as a form of perfect diamagnetism.

Which of the following is NOT a method to create a magnet?

• Aligning magnetic fields of atoms

• Running currents through wires

• Using a non-magnetic material

• Finding a naturally magnetic material

What happens to electrons in a material when exposed to an external magnetic field?

• They become charged

• They stop moving

• They change course

• They align with the field

What is the orientation of a diamagnetic 'compass' in a magnetic field?

• North/South

• East/West

• Up/Down

• Random

Which of the following materials is known to levitate in a strong magnetic field?

• Plastic

• Iron

• Graphene

• Copper

Why is nitrogen considered diamagnetic despite having unpaired electrons?

• It is a metal

• It has a strong magnetic field

• It is a gas

• It forms N2 molecules with full outer electron shells

What is the main characteristic of superconductors in a magnetic field?

• They expel magnetic fields

• They attract magnetic fields

• They heat up

• They become non-magnetic