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Easy

Question

A small electric dipole is placed at origin with its dipole moment directed along positive x-axis. The direction of electric field at point left parenthesis 2 comma times 2 square root of 2 comma 0 right parenthesis is

  1. along z-axis   
  2. along y-axis   
  3. along negative y-axis   
  4. along negative z-axis  

The correct answer is: along negative z-axis


    tan invisible function application theta equals fraction numerator y over denominator x end fraction equals square root of 2 semicolon cot invisible function application theta equals fraction numerator 1 over denominator square root of 2 end fraction text  Also  end text tan invisible function application alpha equals fraction numerator tan invisible function application theta over denominator 2 end fraction equals fraction numerator 1 over denominator square root of 2 end fraction equals cot invisible function application theta rightwards double arrow theta plus alpha equals 90 to the power of ring operator end exponent

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