Unit 6 "Non-Contact Forces" Review Practice

Front

What are non-contact forces?

Back

Forces that act on an object without physical contact, such as gravitational, magnetic, and electric forces.

Front

What happens when two like poles of a magnet are brought close together?

Back

They repel each other.

Front

What happens when two opposite poles of a magnet are brought close together?

Back

They attract each other.

Front

What is an electromagnet?

Back

A type of magnet in which the magnetic field is produced by an electric current.

Front

How can the strength of an electromagnet be increased?

Back

By increasing the number of turns of wire or the current flowing through the wire.

Front

What is the role of current in an electromagnet?

Back

Current flowing through the wire creates a magnetic field around it.

Front

What is the relationship between distance and electric force?

Back

The electric force decreases as the distance between charged objects increases.

Front

What is the formula for calculating electric force between two charges?

Back

F = k * (|q1 * q2|) / r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

Front

What is a magnetic field?

Back

A region around a magnet where magnetic forces can be observed.

Front

What is the difference between permanent magnets and temporary magnets?

Back

Permanent magnets maintain their magnetism, while temporary magnets only exhibit magnetism when in a magnetic field.