Meters and troubleshootingQuestion 741 of 1506

A tachogenerator gives 10 V at its full-scale speed of 1,500 r/min. The voltage is roughly proportional to speed. It reads 6 V. What is the speed?

2,500 r/min
900 r/min
600 r/min
1,000 r/min

Show answer

Correct answer: 900 r/min

6/10 × 1,500 r/min = 900 r/min.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.4: Tachogenerators

Questions last reviewed: 18 October 2026

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