Recreational Vehicle (RV) Technician Practice Test 2026 – All-in-One Guide to Master Your Certification!

Ohm's law states that the current (amperage) in a circuit is directly proportional to the voltage and inversely proportional to the resistance. The formula for Ohm's law can be expressed as:

I = V / R

where I represents the current in amperes (A), V is the voltage in volts (V), and R is the resistance in ohms (Ω). This means that to find the amperage in a circuit, you need to take the voltage and divide it by the resistance. This relationship helps in understanding how changes in voltage or resistance will affect the current flowing through a circuit.

Understanding this principle is crucial for troubleshooting and designing electrical systems in recreational vehicles, as it allows technicians to determine how much current will flow under specific voltage and resistance conditions, ensuring safe and efficient operation of electrical components.