On the definition and measurement of electrical current, what is the justification for the definition and how may the ampere be realized through another parameter?
Where does the definition of current begin, with what empirical observations?
Well, the electric current of any flow of electricity is a flow of electrons through an electrical potential from high to low. In solid materials, such as wire, it is a flow of electrons; in solutions of electrolytes, it is a flow of ions. In plasmas, it can and often is both. Quite simply put, it is the charge flowing through at one coulomb per second, which equals one ampere. The device used to measure current flow is a device called an ammeter, which measures the amount of current in amperes, or amps, for short. Over time, there have been other types of units used to measure units of electrical current. Usually, when a call is made to change the parameters of measuring a quantity of anything, it is to make it more efficient, or use a term that has broader appeal, that is more universally accepted and understood.