Exam-style question
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What distinguishes a Hall effect sensor from a standard conductor?.
- A.It can measure temperature
- B.It generates a Hall voltage in a magnetic field
- C.It has a higher resistance
- D.It operates at lower currents
Model answer
What a good answer should say
- It generates a Hall voltage in a magnetic field
Explanation
Why this works
The cause is the unique design of the Hall effect sensor, which is specifically made to operate in the presence of a magnetic field. The mechanism is that when current flows through the sensor and it is subjected to a magnetic field, the charge carriers experience a force that leads to a voltage difference across the sensor.
The effect is the generation of a measurable Hall voltage. The consequence is that this allows Hall effect sensors to be used for detecting magnetic fields, unlike standard conductors which do not have this capability.
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