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A positive point charge +Q is fixed in s...

A positive point charge `+Q` is fixed in space .A negative point charge `-q` of mass `m` revolves around a fixed charge in elliptical orbits .The fixed charge `+Q `is at one focus of the ellipse.The only force acting on negative charge is the electrostatic force due to positive charge is the electrostatic force due ot positive charge.Then which of the following statement is true

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