For an infinite plane charged surface electric field is constant above it no matter how far we go from the surface. So if the electric field remains constant in magnitude, how can the potential difference vary with distance . I am confuse as with distance if potential decreases electric field strength also decreases.and the force on another charge will also decrease if it goes it weaker areas of electric field strength. And in case of infinite sheet, EFL remains constant and hence the force but potential decreases with distance if the sheet is postive surface charged density.
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