Magnetic Levitation

The video explores different types of magnetism, focusing on diamagnetism, a weak form of magnetism present in all materials. It explains how an external magnetic field affects electrons, causing a repulsive effect. Examples include levitating diamagnetic materials like graphene and frogs. The video also touches on the complexities of nitrogen's diamagnetism and contrasts it with paramagnetism in oxygen. Finally, it discusses superconductors, which exhibit perfect diamagnetism by expelling magnetic fields entirely.

What is the primary characteristic of diamagnetism?

• It repels magnetic fields.

• It aligns with magnetic fields.

• It attracts magnetic fields.

• It has no effect on magnetic fields.

How does a diamagnetic compass behave in a magnetic field?

• It spins randomly.

• It points east-west.

• It aligns with the magnetic field.

• It points north-south.

Which of the following materials is mentioned as being able to levitate in a strong magnetic field due to diamagnetism?

• Iron

• Graphene

• Copper

• Plastic

Why is nitrogen considered diamagnetic despite having unpaired electrons?

• Because nitrogen atoms form N2 molecules with full outer electron shells.

• Because nitrogen atoms are isolated and do not bond.

• Because nitrogen atoms have paired electrons in their natural state.

• Because nitrogen atoms are inherently non-magnetic.

What is a unique feature of superconductors in relation to magnetic fields?

• They have no interaction with magnetic fields.

• They create magnetic fields.

• They attract magnetic fields strongly.

• They expel magnetic fields entirely.