What is the electromotive force between two points in a circuit called?

What is the electromotive force between two points in a circuit called?

• A. Voltage
• B. Current
• C. Resistance
• D. Capacitance

Answer: (B)

Voltage, or potential difference, is the electromotive force between two points in a circuit. It tells you how much energy per unit charge is available to move charges from one point to the other, and it’s what drives current through the circuit. In an ideal source, the emf equals the voltage across that source, though in real circuits terminal voltage can be less due to internal resistance. The other terms describe different ideas: current is the flow of charges, resistance is what opposes that flow, and capacitance is the ability to store charge.

Voltage, or potential difference, is the electromotive force between two points in a circuit. It tells you how much energy per unit charge is available to move charges from one point to the other, and it’s what drives current through the circuit. In an ideal source, the emf equals the voltage across that source, though in real circuits terminal voltage can be less due to internal resistance. The other terms describe different ideas: current is the flow of charges, resistance is what opposes that flow, and capacitance is the ability to store charge.