Resistance Flashcards

All 3 cards in this deck

What is the equation linking potential difference, current and resistance?

$V = I \times R$

potential difference (V) = current (A) $\times$ resistance ($\Omega$).

How is a variable resistor used to control the current in a circuit?

Increasing its resistance increases the total circuit resistance, which reduces (limits) the current.

True or false? Resistance is measured in ohms, and $1\ \Omega$ is $1$ volt per amp.

True. It follows from $R = V \div I$.