Physics · Electric current: drift velocity, mobility and their relation with electric current
A steady current flow in a metallic conductor of non-uniform cross-section. The
A steady current flow in a metallic conductor of non-uniform cross-section. The quantity/quantities remaining constant along the whole length of the conductor is/are:
- A. current, electric field and drift speedd
- B. drift speed only
- C. current and drift speed
- D. current only
Step-by-step solution
For a steady current in a metallic conductor of non-uniform cross-section, the current remains constant due to charge conservation. However, the electric field and drift speed vary inversely with the cross-sectional area because current density changes. Thus, only the current remains constant along the conductor.
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