It flows bc A1 cell 08 easy
+2 e
Explanation: Net charge of a system is sum of charges on all the constituents of the system.
The system contains two spheres. Charge on one sphere is:
qβ = +6 e
Charge on the second sphere is:
qβ = -4 e
Net charge of the system is:
q = qβ + qβ
q = +6 e + (-4 e) = + 2 e
Thus, the net charge of system is +2 e.