A point charge of +2.5 μC is located at the origin of a coordinate system and a second point charge of −5.6 μC is at x = 1.9 m.At what point on the x axis is the electrical potential zero?
A)+4.3 m
B)+5.3 m
C)+0.59 m
D)+11 m
E)+1.3 m

Question

A point charge of +2.5 μC is located at the origin of a coordinate system and a second point charge of −5.6 μC is at x = 1.9 m.At what point on the x axis is the electrical potential zero?
A)+4.3 m
B)+5.3 m
C)+0.59 m
D)+11 m
E)​+1.3 m

Quizplus · Accepted Answer

The electric potential along the x-axis due to the point charge at the origin is given by V1 = kQ1/x. The electric potential due to the second charge at x = 1.9 m is given by V2 = kQ2/(x-1.9). The total electric potential V(x) along the x-axis is the sum of these two potentials. Setting V(x) = 0 and solving for x gives x = 0.59 m. Therefore, the answer is C.

A Point Charge of +2