Advanced Qualification · A-003 Measurements · A-003-003-008
A dip meter:
- A should be tightly coupled to the circuit under test
- B may be used only with series tuned circuits
- C accurately measures frequencies
- D should be loosely coupled to the circuit under test
Correct answer: D — should be loosely coupled to the circuit under test. From the official ISED question bank, verified word for word.
Why
A dip meter works by detecting a drop in its own oscillator signal when it resonates with a nearby circuit, but if you hold it too close, it pulls the circuit's frequency and gives a false reading. The full explanation — and one for every question — is in Pro.
Practise this section
Measurements: meters, oscilloscopes, counters, signal generators, and what a reading actually tells you.