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In the given figure, a battery of emf E is connected across a conductor PQ of length 'l' and different area of cross- sections by having radii r? and r? (r? < r?). Choose the correct option as one moves from P to Q:

Option 1 -

All of these

Option 2 -

Electron current decreases.

Option 3 -

Drift velocity of electron increases.

Option 4 -

Electric field decreases.

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    a month ago
    Correct Option - 3


    Detailed Solution:

    i = constant
    v ∝ E & E ∝ 1/r² So, E increases with decrease in the radius.
    also v ∝ E
    So, drift speed increases.

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