Question

Consider two charges Q and q separated by a distance d . If the potential at the point p (which is in right side from both charges) is V=0 , we can conclude (one answer only):
a)no net force would act on a test charge located at P .
b)Q and q must be same sign but different magnitude.
c)the net work required to move a third charge from inifinity to point P is zero
d)Electric field at P is zero.
e)none of the above

Answer 1

ΔV =V(∞)-V
V(∞)=0
V=0 =>
ΔV = 0
Work of electric field = q₃ΔV=0
Answ. c)

Answer 2

Thank you very much