The voltage at a point midway between two opposite charges that are equal in magnitude is 0. However, between a capacitor where the electric field stays constant, the midway point between the oppositely charged plates is NONZERO
Voltage
Voltage is related to the electric field and to electric potential energy in obvious ways. The electric field is the derivative of the voltage with respect to the radius. The electric field generated by a point charge diminishes along the path dr at a rate of (1/r^2). This causes the voltage to diminish at a rate of (1/r) in this case.
The voltage at a point midway between two opposite charges that are equal in magnitude is 0. However, between a capacitor where the electric field stays constant, the midway point between the oppositely charged plates is NONZERO
And here's a nice diagram and graph of voltage of a point charge decreasing at a rate of 1/R
The voltage at a point midway between two opposite charges that are equal in magnitude is 0. However, between a capacitor where the electric field stays constant, the midway point between the oppositely charged plates is NONZERO