The difference in electrical potential between two points is defined as

The difference in electrical potential between two points is defined as

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

Answer: (A)

The difference in electrical potential between two points is voltage. Electrical potential represents the energy per unit charge at a point in an electric field, and the difference between two points tells you how much energy a unit of charge would gain or require as it moves from one point to the other. This potential difference is what drives current through a circuit—charges tend to move from higher potential to lower potential, and the larger the difference, the greater the driving force for current (assuming the circuit path is available). Current is the actual flow of charges, measured as charge per unit time. Resistance is the property of a material that impedes that flow. Reactance is the opposition to current in AC circuits caused by inductors and capacitors, which depends on frequency.

The difference in electrical potential between two points is voltage. Electrical potential represents the energy per unit charge at a point in an electric field, and the difference between two points tells you how much energy a unit of charge would gain or require as it moves from one point to the other. This potential difference is what drives current through a circuit—charges tend to move from higher potential to lower potential, and the larger the difference, the greater the driving force for current (assuming the circuit path is available).

Current is the actual flow of charges, measured as charge per unit time. Resistance is the property of a material that impedes that flow. Reactance is the opposition to current in AC circuits caused by inductors and capacitors, which depends on frequency.