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:
current only
current, electric field and drift speed
drift speed only
current and drift speed
A
current, electric field and drift speed
B
current only
C
drift speed only
D
current and drift speed
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Solution
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When a steady current flows in a metallic conductor of non-uniform cross-section then the drift speed is Vd=I/neA and the electric field E=I/ρA ⇒Vd∝1A and E∝1A ⇒ Only current remains constant.
In a metallic conductor of non-uniform cross-section, only the current remains constant along the entire length of the conductor.
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