Q123 / 180 · NEET 2015 (Phase 1) · Physics

Across a metallic conductor of non-uniform cross section a constant potential difference is applied. The quantity which remains constant along the conductor is:

  • Correct answer
    A
    Current
  • B
    Drift velocity
  • C
    Electric field
  • D
    Current density

Solution

Current flow across the metallic conductor remains constant because the area of cross-section of conductor is non-uniform. So, Current density will be different but the number of flow of electrons will be same.

Hence, the correct answer is option: 'A'.

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