By continuity, the divergence of the current density equals the negative time derivative of the density of this quantity.
Performing a "conjugation" named for this quantity doesn't change any physical laws according to the CPT theorem. By continuity, the divergence of the current density equals the negative time derivative of the density of this quantity. The magnetic force on a moving particle can be calculated by multiplying this quantity by the cross product of velocity and the magnetic field. Balancing the electric force and gravitational force on oil drops helped Robert Millikan find that this property is quantized. The time derivative of this quantity is electric current. For 10 points, name this quantity that is measured in coulombs.
Performing a "conjugation" named for this quantity doesn't change any physical laws according to the CPT theorem.
electric charge [prompt on q; do not accept or prompt on “elementary charge” or “charge of an electron”]