A circuit diagram shows ... the circuit have a resistance. And in an exam question, they might actually ask you to calculate or explain the resistance of something like a lamp.

Save guides, add subjects and pick up where you left off with your BBC account. Resistance ® close resistance (R)How difficult it is for current to flow. increases when components, for example a ...

When you leaf through a basic electronics textbook, you’ll find ... defying circuit you are told works due to the tunnel diode being of a class of devices having a negative resistance, though ...