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Across a metallic conductor of non-uniform cross section a constant potential difference is applied.
The quantity which remains constant along the conductor is :
  • a)
    electric filed
  • b)
    current density
  • c)
    current
  • d)
    drift velocity
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Across a metallic conductor of non-uniform cross section a constant po...
As the cross-sectional area of the conductor is non-uniform so current density will be different. 
As, I = JA
It is clear from Eq. (i) when an area increases the current density decreases so the number of the flow of electrons will be same and thus the current will be constant.
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Community Answer
Across a metallic conductor of non-uniform cross section a constant po...
It is due to the conservation of charge
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Across a metallic conductor of non-uniform cross section a constant potential difference is applied.The quantity which remains constant along the conductor is :a)electric filedb)current densityc)currentd)drift velocityCorrect answer is option 'C'. Can you explain this answer?
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