Which of the following speed tachometers...

Which of the following speed tachometers...

Question 1 of 2707066636eee28f7522a1c51ea09

Which of the following speed tachometers produces an analog signal proportional to the shaft speed?

Question 1 of 27070

Q

Which of the following speed tachometers produces an analog signal proportional to the shaft speed?

🔍 Key Concepts

• Difference between analog and digital (pulse/frequency) outputs • How a DC generator-type tachometer works compared to sensor-based tachometers • What Hall-effect and variable-reluctance sensors actually produce at their output leads

💭 Think About

• Ask yourself: which device naturally generates a continuous voltage that rises and falls smoothly with speed, instead of discrete pulses? • Think about which options involve sensing passing teeth or marks — what kind of electrical signal does that usually create? • For each choice, picture the actual waveform you would see on an oscilloscope: a smooth line changing with speed, or a series of pulses whose frequency changes with speed?

✅ Before You Answer

• Identify which devices are basically speed sensors that create pulses whose frequency is proportional to speed (more teeth per second = higher frequency). • Identify which device works like a small DC generator, where output voltage level directly follows shaft speed. • Confirm that an analog signal here means a continuous voltage (or current) magnitude, not a pulse train that must be counted or averaged.