Across a metallic conductor of non-uniform cross-section, a constant potential difference is applied. The quantity which remain constant along the conductor is
Text Solution
Verified by ExpertsThe correct answer is:
B
As the cross-sectional area of the conductor is non-uniform, so current density will be different.
As, 
… (i)
It is clear from Eq. (i), when area increases, the current density decreases, so the number of flow of electrons will be same and thus, the current will be constant.
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