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Standard XII
Physics
Electric Potential at a Point in Space Due to a Point Charge Q
Question

Two positive charges q and q are placed at the diagonally opposite corners of a square and two negative charges −q and −q are placed at the other two corners of the square. Then at the centre of the square the resultant electric intensity E and the net electric potential V are


  1. E≠0,V=0
  2. E=0,V=0
  3. E=0,V≠0
  4. E≠0,V≠0

A
E=0,V=0
B
E=0,V≠0
C
E≠0,V≠0
D
E≠0,V=0
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Solution
Verified by Toppr

See the diagram.
The electric field have same magnitudes for all charges but their directions cancel out. Also the potentials of all charges cancel out as two charges are +q and two charges are -q with r being the same for all charges.
91940_6319_ans.png

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