Basic Qualification · B-004 Circuit components · B-004-003-008
Which of these operating conditions is most likely to cause a transistor to fail?
- A Excessive light
- B Saturation
- C Cut-off
- D Excessive heat
Correct answer: D — Excessive heat. From the official ISED question bank, verified word for word.
Why
Excessive heat damages the delicate internal structure of a transistor, often melting connections or permanently altering how it conducts electricity. 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.