Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Magnets have two ends called poles: the North Pole () and the South Pole ().
Magnetic Attraction is a 'pull' force that occurs when opposite poles are brought near each other ( and ).
Magnetic Repulsion is a 'push' force that occurs when similar (like) poles are brought near each other ( and , or and ).
Magnetism is a non-contact force, meaning magnets can exert a force through a space called a magnetic field ().
Only certain materials are magnetic; common examples include Iron (), Nickel (), and Cobalt ().
📐Formulae
Rose
💡Examples
Problem 1:
Sara holds two bar magnets. She points the North pole () of the first magnet toward the North pole () of the second magnet. What force will she feel?
Solution:
She will feel Magnetic Repulsion.
Explanation:
According to the laws of magnetism, like poles ( and ) push away from each other.
Problem 2:
A student places a magnet near a nail made of Iron (). What will happen?
Solution:
The nail will be attracted to the magnet.
Explanation:
Iron () is a ferromagnetic material, meaning it is strongly attracted to the magnetic field produced by a magnet.
Problem 3:
If the distance () between two attracting magnets is increased, what happens to the strength of the magnetic force ()?
Solution:
The magnetic force () decreases.
Explanation:
Magnetic force is strongest when objects are close together and weakens as the distance () between them increases.