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A wire is bent in the form of a regular hexagon and a total charge q is distributed uniformly on it. What is the electric field at the centre? You may answer this part without making any numerical calculations.

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Since it is a regular hexagon. So, it forms
an equipotential surface. Hence the charge at each point is equal . Hence the net electric field at the centre is 0.
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HC VERMA-ELECTRIC FIELD AND POTENTIAL-Exercises
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  7. A particle of mass m and charge q is thrown at a speed u against a uni...

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  9. A ball of mass 100g and having a charge of 4.9xx 10^(-5) C is released...

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  12. A block of mass m containing a net positive charge q is placed on a sm...

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  13. A Uniform electric field of 10NC ^(-1) exists in the vertically downwa...

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  14. 12 j of work has to be done against an existion electric field to take...

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  15. Two equal charges, 2.0xx10^(-7) C each, are held fixed at a separation...

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  16. An electric field of 20 N//C exists along the x-axis in space. Calcula...

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  17. Consider the situation of the previous problem. A charge of 2.0xx 10 ^...

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  18. An electric field vecE = vec(i20 + vecj30 ) NC^(-1) exists in the spac...

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  19. An electric field vecE = vec i Ax exists in the space, where A= 10 V ...

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