Nitrogen makes up about 78% of the Earth's atmosphere.

Electromagnetic waves are a broad form of energy that includes light and radio waves.

This electrical machinery is very high performance.

The intensity of the electric field is proportional to the amount of charge.

Electrification is progressing even in rural areas of Japan.

The prince likes to collect rare pieces of art.

Our town was finally electrified.

Electrons have a negative electric charge.

The intensity of the electric field is proportional to the amount of charge.

The theory of electromagnetic fields is an important part of physics.