Question

Charge of + 1 esu, + 2 esu and +3 esu are placed at the three corners of a square. What charge should be placed at the fourth corner so that potential at the centre may be zero ? One side of the square is $\sqrt{2}$cm.

• A.
  • 6 esu
• B. – 6 esu
• C.
  • 4 esu
• D. – 4 esu

Answer 1

Answer: (B)

– 6 esu

Answer 2

r = 1 cm

\ V_O = = 0

\ q = – 6 esu