Correct AnswerC. More precision with longer sampling interval
Quick Explanation
A frequency counter estimates frequency by counting input cycles during a fixed gate/sampling interval. A longer interval counts more cycles and therefore improves frequency resolution and precision; the basic count-to-frequency relation is f = N/T_g.
Detailed Explanation
Concept & Reasoning
If N complete cycles are counted during a gate interval T_g, the measured frequency is N/T_g. The ±1-count uncertainty corresponds to an approximate frequency resolution of 1/T_g. Thus increasing the sampling interval reduces the frequency quantization step and improves precision.
How to Solve It in the Exam
Longer gate time → finer frequency resolution.
Important Exam PointSeparate actual signal frequency from measurement resolution; the signal itself does not change when gate time changes.
Related Revision Path
This question sits in the revision path Digital Electronics → Digital Measurement → Frequency Counters .
