Basic Qualification · B-004 Circuit components · B-004-006-010
On resistors with four colour bands, which colour band differentiates two resistors rated at 120 ohms and 1200 ohms respectively?
- A Third
- B First
- C Second
- D Fourth
Correct answer: A — Third. From the official ISED question bank, verified word for word.
Why
The third band is the multiplier, which tells you how many zeros to add to the first two digits. The full explanation — and one for every question — is in Pro.
Practise this section
The parts inside the box: resistors, capacitors, inductors, diodes, transistors, tubes and what each does in a circuit.