Electromagnet Flashcard 2022

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a wire wound into a coil, often wrapped around a ferromagnetic core.

Front

What happens to the strength of an electromagnet when more wire is added?

Back

The strength of the electromagnet increases as more wire is added, provided the current remains constant.

Front

What is the relationship between electric field lines and the strength of the electric field?

Back

The closer the electric field lines are to each other, the stronger the electric field. When the lines are further apart, the field is weaker.

Front

What do like charges do in an electric field?

Back

Like charges repel each other in an electric field.

Front

What do opposite charges do in an electric field?

Back

Opposite charges attract each other in an electric field.

Front

What is the significance of the direction of electric field lines?

Back

Electric field lines point away from positive charges and toward negative charges, indicating the direction of the force that a positive test charge would experience.

Front

What is a magnetic field?

Back

A magnetic field is a region around a magnet where magnetic forces can be observed. It is represented by magnetic field lines that show the direction and strength of the field.

Front

How can you determine the direction of a magnetic field around a current-carrying wire?

Back

The direction of the magnetic field can be determined using the right-hand rule: if you point your thumb in the direction of the current, your fingers will curl in the direction of the magnetic field lines.

Front

What is the effect of increasing the current in a wire on the strength of the magnetic field?

Back

Increasing the current in a wire increases the strength of the magnetic field around the wire.

Front

What is the purpose of wrapping wire around a core in an electromagnet?

Back

Wrapping wire around a core increases the magnetic field strength produced by the electromagnet, as the coil amplifies the magnetic effect of the current.