# 2.2) A regular hexagon of side 10 cm has a charge  at each of its vertices. Calculate the potential at the centre of the hexagon.

The electric potential at O due to one charge,

q = 5 × 10-6 C

r = distance between charge and O = 10 cm = 0.1 m

Using the superposition principle, each charge at corners contribute in the same direction to the total electric potential at the point O.

=

Therefore the required potential at the centre is

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