Officer Aptitude Rating (OAR) Test 2025 – 400 Free Practice Questions to Pass the Exam

The formula V = I * R is used to calculate the voltage drop across a circuit. In this formula, 'V' represents the voltage, 'I' represents the current in amperes, and 'R' represents the resistance in ohms. This relationship demonstrates Ohm's Law, which is fundamental in understanding electrical circuits.

When the current flows through a resistance, there is a voltage drop that occurs due to that resistance. By rearranging the formula, you can see that if you know the current flowing through the circuit and the resistance, you can easily calculate the voltage drop. This is an essential concept in circuit analysis and understanding how electrical components interact within a system.

The other concepts mentioned, such as total power, current, and resistance, involve different formulas for their respective calculations. Power, for instance, is calculated using the formula P = V * I. Understanding this specific formula and its purpose allows you to analyze how voltage, current, and resistance relate to each other in an electric circuit.