AMT General – Fundamentals of Electricity Practice Exam

Current is the rate at which electric charge flows past a point. It is defined as I = Q / t, meaning the amount of charge Q that passes per unit time t. The unit is the ampere, where 1 A equals 1 coulomb per second. So the statement amperes = charge / time is the correct definition.

The other ideas mix up different electrical quantities. Dividing voltage by time isn’t a standard quantity for electrical power or any other common measure. Voltage is energy per unit charge (V = energy per charge), and energy divided by time gives power, not current. For example, if 6 coulombs pass in 2 seconds, the current is 3 A.