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  4. Two point charges are kept at a certain distance from one another. The graph represents the variation of the potential along the straight line connecting the two charges. At what point is the electric field zero?

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Q. Two point charges are kept at a certain distance from one another. The graph represents the variation of the potential along the straight line connecting the two charges. At what point is the electric field zero?Physics Question Image

Electrostatic Potential and Capacitance

Solution:

$E_{x}=-\frac{d V}{d x}=0 \rightarrow$ at point 3