Mobility Definition
Mediumphysics
Mobility μ of charge carriers defined as?
Select the correct option:
Solution
Incorrect! Answer:
Drift velocity / electric field
- Definition: Mobility (μ) is a measure of how easily a charge carrier (electron or hole) moves through a material when subjected to an electric field.
- Formula: μ=Evd, where vd is the magnitude of drift velocity and E is the electric field strength.
- Units: m2V−1s−1.
- Insights:
- Electrons generally have significantly higher mobility than holes in the same material.
- High mobility is desirable for high-speed electronic devices.
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About This Question
- Subject
- physics
- Chapter
- semiconductor devices
- Topic
- mobility definition
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Drift velocity / electric field
- Definition: Mobility (μ) is a measure of how easily a charge carrier (electron or hole) moves through a material when subjected to an electric field.
- Formula: μ=Evd, where vd is the magnitude of drift velocity and E is the electric field strength.
- Units: m2V−1s−1.
- Insights:
- Electrons generally have significantly higher mobility than holes in the same material.
- High mobility is desirable for high-speed electronic devices.
This medium difficulty physics question is from the chapter semiconductor devices, covering the topic of mobility definition. It appeared in the 2025 exam.
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