EO4: EM, Motors, and Generators

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons through a conductor, such as a wire.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in an object, which is the energy associated with its motion and position.

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

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the number of coils of wire, increasing the current, or using a ferromagnetic core.

Front

What is the role of a battery in an electromagnet?

Back

A battery provides the electrical energy needed to create a magnetic field in an electromagnet.

Front

What happens when you disconnect the battery from an electromagnet?

Back

When you disconnect the battery, the electromagnet loses its magnetic field and will no longer attract magnetic objects.

Front

What is the relationship between voltage and magnetic field strength in an electromagnet?

Back

Higher voltage increases the current flowing through the wire, which in turn increases the strength of the magnetic field.

Front

What is the principle of energy transformation in motors?

Back

In motors, electrical energy is transformed into mechanical energy to perform work.

Front

What is the principle of energy transformation in generators?

Back

In generators, mechanical energy is transformed into electrical energy.

Front

What is the significance of the number of coils in an electromagnet?

Back

The number of coils affects the strength of the magnetic field; more coils result in a stronger magnetic field.