Magnetism and Magnetic Forces Concepts

Mr. Fullerton explains magnetism, caused by moving electrical charges, and discusses magnetic poles, interactions, and field lines. He describes how permanent magnets work, the concept of polarization, and the behavior of magnetic forces. The video also covers how to determine if an object is a magnet and the properties of magnetic field lines, emphasizing their direction and strength.

What causes magnetism in permanent magnets?

• The random movement of electrons

• The movement of neutrons

• The spinning of electrons in the same direction

• The alignment of protons in the same direction

What type of fields are present near a moving electric charge?

• Only a magnetic field

• Neither electric nor magnetic fields

• Only an electric field

• Both electric and magnetic fields

What happens when you cut a magnet in half?

• You get two magnets, each with a north and south pole

• You get one magnet with only a north pole and one with only a south pole

• The magnet becomes stronger

• The magnet loses its magnetic properties

Which of the following is an example of a magnetic attractable?

• A glass bottle

• A block of wood

• A plastic spoon

• A paperclip

How does the distance between two magnetic objects affect the magnetic force between them?

• The force becomes stronger as the distance increases

• The force becomes weaker as the distance increases

• The force remains the same regardless of distance

• The force becomes stronger as the distance decreases

In a sample problem, if the closest poles of two bar magnets are both north, what type of force will they exert on each other?

• Repulsive gravitational force

• Attractive gravitational force

• Repulsive magnetic force

• Attractive magnetic force

If two pieces of iron attract each other from both ends, what can be concluded?

• Neither piece is a magnet

• Both pieces are non-magnetic

• One piece is a magnet and the other is a magnetic attractable

• Both pieces are magnets

What is the nature of the gravitational force between two objects?

• Always attractive

• Can be either attractive or repulsive

• Depends on the magnetic properties of the objects

• Always repulsive

How are magnetic field lines drawn around a bar magnet?

• From south to north outside the magnet

• From north to south inside the magnet

• From north to south outside the magnet

• In random directions

Where is the magnetic field strength greatest between two north magnetic poles?

• At point D

• At point C

• At point B

• At point A