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Electric charge
The charge (q or Q) indicates how matter is affected by electromagnetic fields.
Explanation
Electric charges are integer multiples of the elementary charge e. Charges that are not multiples of e occur in quarks as e / 3, but they are always confined within protons and neutrons.
Example 1
The Lorentz force acts on an electric charge
where
F Lorentz force q Electric charge E Electric field v Velocity × Cross product B Magnetic induction