Technician A says a Hall-effect switch uses a semiconductor, permanent magnet, and trigger wheel to measure shaft speed. Technician B says an engine coolant temperature sensor is basically a thermistor. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Both statements are correct. A Hall-effect switch indeed uses a semiconductor, permanent magnet, and trigger wheel to measure shaft speed, and an engine coolant temperature sensor is essentially a thermistor, which changes resistance with temperature.

Technician a Says a Hall-Effect Switch Uses a Semiconductor, Permanent