Practicing Success
When a steady current flows in a metalic conductor of non-uniform cross section. Which of these quantities is constant along the conductor. A. Current Choose the correct answer from the options given below: |
D Only A, B and D Only C and E Only A Only |
A Only |
When a steady current flows in a metallic conductor of non-uniform cross-section then the drift speed is $ V_d = \frac{I}{neA} $ Electric Field $ E = \frac{I}{\rho A}$ $\Rightarrow V_d \propto \frac{1}{A} , E \propto \frac{1}{A}$ Current density $ J = \frac{I}{A} $ Potential gradient also depends area. Only Current is independent of area. Correct option is A Only.
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