Forces At A Distance

Front

What is a force at a distance?

Back

A force that can act on an object without physical contact, such as gravitational, magnetic, or electric forces.

Front

What happens to the strength of a magnetic field when the number of turns of wire around a nail increases?

Back

The strength of the magnetic field increases.

Front

What is magnetism?

Back

Magnetism is a type of force at a distance that can attract or repel certain materials, primarily metals like iron.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.

Front

Which materials are commonly used as cores in electromagnets?

Back

Iron is commonly used as a core material in electromagnets because it enhances the magnetic field.

Front

True or False: A magnetic field is created when energy flows through a wire.

Back

True.

Front

What is the relationship between the number of coils of wire and the strength of an electromagnet?

Back

The more coils of wire there are, the stronger the electromagnet will be.

Front

What is a permanent magnet?

Back

A permanent magnet is a material that maintains a persistent magnetic field without the need for an external power source.

Front

What is the difference between contact forces and forces at a distance?

Back

Contact forces require physical contact between objects, while forces at a distance can act without direct contact.

Front

What is the role of a battery in an electromagnet?

Back

A battery provides the electric current needed to create a magnetic field in an electromagnet.