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Question

Six charges are placed at the corner of a regular hexagon as shown. If an electron is placed at the centre O, force on it will be:
124876_f433e863ac2444ffb949b8eda22e44ec.png
  1. zero
  2. along OF
  3. along OC
  4. none of these

A
zero
B
along OC
C
along OF
D
none of these
Solution
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The charges will be balanced by their counterparts on opposite side. So eventually the charges remaining will be 2q on B and 3q on D.
Since the charge distribution is unsymmetrical, the net force on charge would be skewed towards D.

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