Definition

Noun: - The difference in electrical charge between two points in a circuit expressed in volts: This is the standard scientific term for the work needed per unit of charge to move a test charge between two points. It is the driving force that causes electric current to flow in a circuit.

Usage

• This term is used in physics and electrical engineering to quantify the electrical potential difference.
• It is a precise, technical term. In everyday language, people more commonly use "voltage" or "voltage drop."
• It is typically measured with a voltmeter.

Examples

• Noun:
  • The potential drop across the resistor was measured to be 5 volts.
  • To calculate the current, you must know the potential drop and the resistance.
  • A significant potential drop indicates high resistance in that part of the circuit.

Advanced Usage

• "IR drop": A specific type of potential drop equal to the product of the current (I) and the resistance (R) in a component, as described by Ohm's Law (V = IR).
  • The IR drop across the wiring was causing a loss of power to the motor.

Variants and Related Words

• Voltage (n): The common synonym for electrical potential difference.
• Voltage drop (n): Often used interchangeably with "potential drop," especially when referring to a decrease in voltage across a component due to its resistance.
• Electromotive force (EMF) (n): The potential difference generated by a source like a battery when no current is flowing, closely related but not identical to the potential drop under load.
• Potential difference (n): The more general term of which "potential drop" is a specific instance.

Synonyms

• Voltage
• Voltage drop
• Electrical potential difference

Related Phrases

• Across a component: This phrase is almost always used with "potential drop" to specify where the measurement is taken.
  • The potential drop across the diode was 0.7 volts.
• Measure the drop: A common shorthand in technical contexts.
  • First, measure the drop from point A to point B.

Noun

1. the difference in electrical charge between two points in a circuit expressed in volts