Bennett Mechanical Comprehension Practice Test

In the equation I = V/R, V represents the potential difference in volts. This equation is derived from Ohm's Law, which relates current (I), voltage (V), and resistance (R) in an electrical circuit. The potential difference, measured in volts, is the driving force that pushes electric current through a conductor. It essentially indicates how much energy per unit charge is available to move the charges through the circuit. Therefore, recognizing that V signifies this voltage is crucial for understanding basic electrical principles.

The other options describe different concepts in electrical engineering: current in amperes refers to the flow of electric charge, resistance in ohms refers to the opposition to current flow, and power in watts indicates the rate at which electrical energy is consumed or produced. Knowing what each symbol represents in the context of electrical equations is fundamental for solving problems in circuits.