Exam-style question
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In a Hall effect sensor, what happens when the temperature of the conductor increases?.
- A.The Hall voltage increases.
- B.The Hall voltage decreases.
- C.The Hall voltage remains constant.
- D.The Hall voltage becomes unstable.
Model answer
What a good answer should say
- The Hall voltage decreases.
Explanation
Why this works
The cause is the increase in temperature of the conductor. The mechanism is that higher temperatures lead to increased lattice vibrations, which scatter charge carriers more frequently, reducing their mobility.
The effect is a decrease in Hall voltage, which can affect the sensor's accuracy and sensitivity, necessitating temperature compensation in sensitive applications.
Common mistake
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