Recreational Vehicle (RV) Technician Practice Test

What does resistance indicate in an electrical system?

1. Flow of electrons

2. Electrical pressure

3. Opposition to electrical flow

4. Energy stored in a circuit

The correct answer is: Opposition to electrical flow

Resistance in an electrical system refers to the measure of opposition that a component or material provides to the flow of electric current. Essentially, it quantifies how much a material resists the movement of electrons through it. When resistance is high, it means that there is a greater difficulty for the electrons to flow, which can affect the overall functioning of the circuit in terms of current and voltage levels. Resistance is a fundamental property in circuits, as it can influence various factors such as heat generation, energy loss, and the efficiency of power distribution. Understanding resistance is crucial for technicians when diagnosing electrical issues or designing systems, as it helps inform decisions about component selection and circuit configuration. The other options, while related to the principles of electricity, do not correctly define resistance. The flow of electrons refers to current, electrical pressure describes voltage, and energy stored in a circuit pertains to capacitance.