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Four identical charges are placed at the...

Four identical charges are placed at the points `(1,0,0), (0,1,0),(-1,0,0)`, and `(0,-1,0)`. Then,

A

The potential at the origin is zero.

B

The field at the origin is zero

C

The potential at all ponts on the `z`-axis, othehr than the origin, is zero.

D

The field at all points on the `z`- axis, other than the origin, acts along the `z`-axis.

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The correct Answer is:
A, B, C, D
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