Four charges each of charge Q are kept at four corners of a regular pentagon. Distance of centre of pentagon from a corner is a. Electric field at Centre of the pentagon is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
If all the vertices of a regular polygon is occupied by equal charges, the field at Centre of polygon is zero.
Resultant field of 4 charges will be cancelled by the electric field due to 5th charge.
As field due to 
charge, Q
So, field due to other four charge will be 
.
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