Four charges of $1\ \mu C, 2\ \mu C, 3\ \mu C,$ and $- 6\ \mu C$ are placed one at each corner of the square of side $1\,m$. The square lies in the $x-y$ plane with its centre at the origin.
Four charges of $1\ \mu C, 2\ \mu C, 3\ \mu C,$ and $- 6\ \mu C$ are placed one at each corner of the square of side $1\,m$. The square lies in the $x-y$ plane with its centre at the origin.
- A
The electric potential is zero at the origin.
- B
The electric potential is zero everywhere along the $x-$axis only of the sides of the square are parallel to $x $ and $y$ axis.
- C
The electric potential is zero everywhere along the $z-$axis for any orientation of the square in the $x- y$ plane.
- D
$A$ and $C$ both
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