The point with zero potential is located between the two charges. Let the point be x m from the -10.0nC point charge
r10 = x m
r20 = (d - x) m, where d is the separation of the two point charges.
d = 15 cm(1m/100cm) = 0.15 m
q1 = -10.0 nC (10-9C/1nC) = -10.0 × 10-9 C
q2 = 20.0 nC (10-9C/1nC) = 20.0 × 10-9 C
A -10.0nC point charge and a +20.0nC point charge are 15.0cm apart on the x-axis.
a) What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?
b) What is the direction of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?
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