Advanced Qualification · A-003 Measurements · A-003-006-007
The range of a DC ammeter can easily be extended by:
- A changing the internal inductance of the meter
- B changing the internal capacitance of the meter to resonance
- C connecting an external resistance in parallel with the internal resistance
- D connecting an external resistance in series with the internal resistance
Correct answer: C — connecting an external resistance in parallel with the internal resistance. From the official ISED question bank, verified word for word.
Why
To measure larger currents without damaging a delicate meter, you must give the extra current a safe path to bypass the instrument. 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.