The charges of same magnitude q are placed at four corners of a square of side a. The value of potential at the center of square will be -
A
4kq/a
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Distance from center to any corner
For a square of side a,
Half of the diagonal = distance from center to corner:
Potential due to one charge
Potential due to one charge q at distance 
:
Total potential (scalar sum)
Since potential is a scalar quantity, total potential due to 4 charges:
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