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Questions and Answers
What is the phenomenon called when a measurable voltage is produced between the two sides of a conductor due to the influence of a magnetic field?
What is the phenomenon called when a measurable voltage is produced between the two sides of a conductor due to the influence of a magnetic field?
- Hall effect (correct)
- Maxwell effect
- Faraday effect
- Lorentz effect
Who is credited with the discovery of the Hall effect?
Who is credited with the discovery of the Hall effect?
- Michael Faraday
- E. H. Hall (correct)
- Nikola Tesla
- Thomas Edison
Why is conventional current used in most common electrical applications?
Why is conventional current used in most common electrical applications?
- It produces a higher voltage
- It is easier to measure
- It aligns with the Hall effect
- Positive and negative charge movement is considered equivalent (correct)
What type of materials has the Hall effect been used to study?
What type of materials has the Hall effect been used to study?
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How does the Hall voltage polarity differ for positive and negative charge carriers?
How does the Hall voltage polarity differ for positive and negative charge carriers?
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Study Notes
Hall Effect
- A measurable voltage generated across a conductor due to a magnetic field influence is known as the Hall effect.
- This phenomenon occurs when a current-carrying conductor is placed in a magnetic field perpendicular to the current flow.
Discovery
- Edwin Hall is credited with the discovery of the Hall effect in 1879. His work laid the foundation for further studies in electromagnetism.
Conventional Current
- Conventional current refers to the flow of positive charge, which is opposite to the actual electron flow.
- It is used in most electrical applications for historical and practical reasons, providing a consistent framework for circuit analysis.
Application in Materials
- The Hall effect is primarily used to study semiconductors and metals.
- It provides insights into carrier concentration, mobility, and type of charge carriers in various materials.
Hall Voltage Polarity
- The polarity of the Hall voltage varies depending on charge carriers:
- Positive charge carriers produce a Hall voltage of one polarity.
- Negative charge carriers yield a Hall voltage of the opposite polarity.
- This characteristic helps in identifying the type of charge carriers in a material.
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