What is voltage?

• A. A measure of current flowing through a circuit
• B. Electrical force capable of moving charged particles through a conductor between two regions or points
• C. The resistance to current flow in a conductor
• D. A unit of electrical energy

Answer: (B)

Voltage is the electrical potential difference that acts as the push moving charged particles through a conductor. It’s the pressure that drives current from one point to another in a closed circuit, coming from stored energy in a source like a battery and measured in volts. According to Ohm’s law, current equals voltage divided by resistance, so higher voltage increases current if resistance remains the same. The other concepts mix up what voltage represents: current is the actual flow of charge, resistance is the opposition to that flow, and energy is measured in units like joules, not volts.