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Question

The potential at a point x (measured in μm) due to some charges situated on the x-axis is given by V(x)=20/(x24) volt. The electric field E at x=4μm is given by:


  1. 53 V/μm and in the positive x direction
  2. 109 V/μm and in the negative x direction
  3. 109 V/μm and in the positive x direction
  4. 53 V/μm and in the negative x direction

A
109 V/μm and in the negative x direction
B
53 V/μm and in the negative x direction
C
109 V/μm and in the positive x direction
D
53 V/μm and in the positive x direction
Solution
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Given V(x)=20x24

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[AIEEE-2007]


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