Question

Why electric field is constant in a uniform conductor when current flows throgh it?

Answer 1

Answer:

Since a steady current flows through a conductor of non-uniform cross section, Resistance varies, therefore current varies. Current density is directly proportional to Electric Field (J = σ E), which implies, Electric field is also not constant. So, Drift speed ain't a constant too.

Answer 2

Explanation:

When a steady current flows in a metallic conductor of non uniform cross-section, the current flowing through the conductor is constant. Current density, electric field, and drift speed are inversely proportional to the area of cross-section.

Voltage (V) is directly proportional to current (I).