Question

The diagram shows the arrangement of three small uniformly charged spheres $A,B$ and $C.$ The arrows indicate the direction of the electrostatic forces acting between the spheres (for example, the left arrow on sphere $A$ indicates the electrostatic force on sphere $A$ due to sphere $B$). At least two of the spheres are positively charged. Which sphere, if any, could be negatively charged?

Answer 1

$Ais(+)ve$

$B\&C(-)ve$