Electric Charge

🡑 Electrostatics

There are two types of electric charge: positive and negative. Protons are responsible for positive charges and electrons are responsible for negative charges.

Net electric charge can be calculated by taking the difference between the two types of charges.

Charges of opposite polarity attract while charges of same polarity repel. For instance, two protons will repel each other. Two electrons would also repel each other. However a proton and an electron will be attracted to each other.

Charge can be described in units of eV (electron volt), or C (coulombs).

1\ eV = 1.602\times10^{−19}\ C

A proton has a charge of 1 eV

An electron has a charge of -1 eV

1 eV is also known as e (elementary charge) since it is the smallest unit of charge. Because of this, any object with an electric charge must have a charge that is an integer multiple of the elementary charge.