Exam-style question
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What is the Hall effect in a current-carrying conductor?.
Model answer
What a good answer should say
- The Hall effect occurs when a magnetic field is applied perpendicular to the flow of current in a conductor, causing a voltage (Hall voltage) to develop across the conductor.
- This voltage is a result of the Lorentz force acting on the charge carriers, which deflects them to one side of the conductor, creating a potential difference.
Explanation
Why this works
This answer is strong because it clearly defines the Hall effect and describes the mechanism (Lorentz force) that leads to the development of Hall voltage. It connects the cause (magnetic field) to the effect (Hall voltage) and explains the consequence of this phenomenon in terms of its practical implications in sensing applications.
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