Physics-
General
Easy

Question

In the following diagram the work done in moving a point charge from point P to point A, B and C is respectively as W subscript A end subscript comma blank W subscript B end subscript a n d W subscript C end subscript then

  1. W subscript A end subscript equals W subscript B end subscript equals W subscript C end subscript    
  2. W subscript A end subscript equals W subscript B end subscript equals W subscript C end subscript equals 0    
  3. W subscript A end subscript greater than W subscript B end subscript greater than W subscript C end subscript    
  4. W subscript A end subscript less than W subscript B end subscript less than W subscript C end subscript    

The correct answer is: W subscript A end subscript equals W subscript B end subscript equals W subscript C end subscript


    When a positive charge is moved from one point to another in an electric of magnetic field, then under the influence of the field force acts on the particle and an external agent will have to do work against this force. But in the given case the charge moves under influence of no field, hence it does not experience any force therefore, no work is done.
    W subscript A end subscript equals W subscript B end subscript equals W subscript C end subscript equals 0

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