Electric Potential and Potential Difference Lecture Notes

Vocabulary flashcards covering the concepts, units, and instruments related to electric potential and potential difference based on the lecture transcript.

Electric potential difference

The work done to move a unit charge from one point to the other in an electric circuit carrying some current, defined by the ratio $V = \frac{W}{Q}$.

Volt (V)

The SI unit of electric potential difference, named after the Italian physicist Alessandro Volta ($1745$-$1827$).

1 Volt

The potential difference between two points in a current-carrying conductor when $1\text{ joule}$ of work is done to move a charge of $1\text{ coulomb}$ from one point to the other ($1\text{ V} = \frac{1\text{ J}}{1\text{ C}}$).

Potential Difference Formula

$V = \frac{W}{Q}$, where $V$ is the potential difference, $W$ is the work done, and $Q$ is the charge.

Battery

A device consisting of one or more electric cells that generates potential difference across its terminals through chemical action to set charges in motion.

Voltmeter

An instrument used to measure the electric potential difference, which is always connected in parallel across the points to be measured.

Ammeter

An instrument used to measure electricity.

Resistor

An instrument used to measure resistance.

Alessandro Volta

The Italian physicist ($1745$-$1827$) after whom the unit of electric potential is named.

Electric Pressure

An analogy used for potential difference, which causes electrons to move along a conductor, similar to how a pressure difference causes water to flow.