Question
When is an analog multimeter preferred to a digital multimeter?
Answer Options
- A) When testing logic circuits
- B) When high precision is desired
- C) When measuring the frequency of an oscillator
- D) When adjusting circuits for maximum or minimum values
Correct Answer: D
Explanation
While a digital multimeter (DMM) offers higher precision, an analog multimeter (AMM) has an advantage in scenarios where continuous, smooth visual feedback is needed. When an operator is adjusting circuits for maximum or minimum values (such as tuning a transmitter or peaking a filter), the fluid movement of an analog meter’s needle is easier to follow than a series of constantly changing numbers on a digital display.
The pointer’s sweep instantly indicates the trend (increasing/decreasing), allowing the operator to quickly find the exact peak or null setting. This visual feedback is often more valuable than the DMM’s numerical precision for alignment tasks.
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