Drift Velocity
Drift velocity v_d relates current by I = n A e v_d. Increasing cross-sectional area keeping current same makes v_d:
Select the correct option:
Solution
Decrease
Drift velocity (vd) is the average velocity acquired by free electrons in a conductor due to an electric field. vd=nAeI Given I is constant: vd∝A1 Increasing the area (A) reduces the drift velocity needed to maintain the same total current flow.
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About This Question
- Subject
- physics
- Chapter
- current electricity
- Topic
- drift velocity
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Decrease
Drift velocity (vd) is the average velocity acquired by free electrons in a conductor due to an electric field. vd=nAeI Given I is constant: vd∝A1 Increasing the area (A) reduces the drift velocity needed to maintain the same total current flow.
This medium difficulty physics question is from the chapter current electricity, covering the topic of drift velocity. It appeared in the 2025 exam.
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