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six charges of equal magnitude, 3 poisti...

six charges of equal magnitude, 3 poistive and 3 negative are to be placed on PQRSTU corners of a regular hexagon, such that field at the centre is double that of what it would have been if only one +ve charge is placed at R. Which of the following arrangement of charge is posisble for P, Q, R, S, T and U respectively.

A

`+,+,+,-,-,-`

B

`-,+,+,-,-`

C

`-,+,+,-,+,-`

D

`+,-,+,-,+,-`

Text Solution

Verified by Experts

The correct Answer is:
C
P and S cancel field
Q and T cancel field
R and U add on
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