What is defined as the energy transferred per unit charge between two points in a circuit?

What is defined as the energy transferred per unit charge between two points in a circuit?

• A. Potential difference
• B. Current
• C. Resistance
• D. Power

Answer: (A)

Potential difference, or voltage, is the energy transferred per unit charge between two points in a circuit. It tells you how much energy each coulomb of charge gains (or loses) as it moves from one point to the other. The unit is the volt, defined as one joule per coulomb. For example, a 9-volt source gives each coulomb of charge 9 joules of energy as it moves through the circuit. This energy transfer is what drives current through components. Current is the rate of charge flow, not the energy per charge; resistance describes how much a component opposes the flow, and power is the rate of energy transfer over time.

Potential difference, or voltage, is the energy transferred per unit charge between two points in a circuit. It tells you how much energy each coulomb of charge gains (or loses) as it moves from one point to the other. The unit is the volt, defined as one joule per coulomb. For example, a 9-volt source gives each coulomb of charge 9 joules of energy as it moves through the circuit. This energy transfer is what drives current through components. Current is the rate of charge flow, not the energy per charge; resistance describes how much a component opposes the flow, and power is the rate of energy transfer over time.