Potential Difference Flashcards

All 5 cards in this deck

What is potential difference (voltage)?

The energy transferred per unit charge passed.

What is 1 volt equal to in other units?

$1$ joule per coulomb ($1\ \text{J/C}$).

What is the equation linking energy transferred, charge moved and potential difference?

$E = Q \times V$

energy (J) = charge moved (C) $\times$ potential difference (V).

How is a voltmeter connected to measure the potential difference across a component?

In parallel with the component; it reads the potential difference in volts (V).

What happens to the total potential difference when cells are connected in series, all facing the same way?

The potential differences of the cells add together, e.g. three 1.5 V cells give 4.5 V.