Electric Charge
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. Electric charge can be positive or negative (commonly carried by protons and electrons respectively).
Symbol: q
SI of Measurement: coulomb
Mathematical Expression

References:
- Electric Current and Current Flow – Electrical Classroom
- https://en.wikipedia.org/wiki/Electric_charge
- https://www.bipm.org/documents/20126/41483022/si_brochure_8.pdf