Electricity is the actual movement of electrons through the conductor. Regarding the Water hose, electricity is the water flowing through the hose. So that the current flows, There has to be a complete path. When the circuit is interrupted, no current flows. The unit of measurement for the current flow is the ampere (ampere) and the letter for The amperage is “A” unless it is used in formulas to calculate the current. In this case, the The letter “I” denotes the current. Ohm’s law is also used to calculate the current. electricity is calculated by dividing the voltage by the resistance. As an example I = E ÷ R.