Question

Four charges, all of the same magnitude, are placed at the four corners of a square. At the centre of the square, the potential is V and the field is E. By suitable choices of the signs of the four charges, which of the following can be obtained –

• A. $V=0,E=0$
• B. $V=0,E\ne 0$
• C. $V\ne 0,E=0$
• D. $V\ne 0,E\ne 0$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A

$V=0,E=0$

B

$V=0,E\ne 0$

C

$V\ne 0,E=0$

D

$V\ne 0,E\ne 0$

$V=0;E=0$

$V=0;E\ne 0$

$V\ne 0;E=0$

$V\ne 0;E\ne 0$