Given circle, x2−2x+y2=0
Centre C(1,0)
The locus of the mid-points of the chords of given circle from point (0,0) is a circle whose extremities of diameter is centre and given point.
Locus of mid-points of the chord is (x−1)(x−0)+(y−0)(y−0)=0 ⇒x2−x+y2=0
or x2+y2−x=0