1.

Ten charges are placed on the circumference of a circle of radius R with constant angular separation between successive charges. Alternate charges 1, 3, 5, 7, 9 have charge (+q) each, while 2, 4, 6, 8, 10 have charge (–q) each. The potential V and the electric field E at the centre of the circle are respectively. (Take V = 0 at infinity)

Answer»

The correct option is (1).

ΣQ = 0

V = 0 

Also, field of one charge will get cancelled due to another symmetrical charge in front of it.



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