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A -10.5 nC point charge and a +21.0nC point charge are 18.0 cm apart on the...

A -10.5 nC point charge and a +21.0nC point charge are 18.0 cm apart on the x-axis.

a) What is the electric potential at the point on the x-axis where the electric field is zero?

b) What is the magnitude of the electric field at the point on the x-axis, between the charges, where the electric potential is zero?

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