All voltages are _______, which means that a battery or DC generator creates a potential difference that can force charge through a wire.

All voltages are _______, which means that a battery or DC generator creates a potential difference that can force charge through a wire.

• A. Constant
• B. Series
• C. Differential
• D. Alternating

Answer: (C)

Voltage is the potential difference between two points. That difference is what pushes charges through a conductor when a circuit is closed. A battery or DC generator establishes a higher potential at one terminal than at the other, creating this potential difference that can drive current. Because voltage is defined as how much potential changes between two points, it is inherently differential rather than an absolute value. While a voltage can be constant or varying in time and can exist in either DC or AC forms, the essential idea is that voltage is the difference in electric potential, which is why “differential” is the correct description.

Voltage is the potential difference between two points. That difference is what pushes charges through a conductor when a circuit is closed. A battery or DC generator establishes a higher potential at one terminal than at the other, creating this potential difference that can drive current. Because voltage is defined as how much potential changes between two points, it is inherently differential rather than an absolute value. While a voltage can be constant or varying in time and can exist in either DC or AC forms, the essential idea is that voltage is the difference in electric potential, which is why “differential” is the correct description.