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[" Let "AB" be a chord of the circle "x^...

[" Let "AB" be a chord of the circle "x^(2)+y^(2)=r^(2)" subtending a right angle at the centre.Then,locus of the "],[" centroid of the triangle "PAB" as "P" moves on the circles is "],[[" (A) a parabola "," (B) a circle "],[" If the tangent at the point "P" on the circle "x^(2)+y^(2)+6x+6y=2," meets the straight line "],[5x-2y_(e)+6=0" at a point "Q" on the "y" -axis,then the length of "PQ" is "," (IIT- "2002]]]

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