If `y=2x`is a chord of circle `x^2+y^2-10x=0`,find the equation of circle with this chord as diameter.

Solve the following:If y=5x is a chord of the circle x^2+y^2+20x=0 then find the equation of a circle with this chord as diameter.

Answer the following: The line 2x-y+6=0 meets the circle x^2+y^2+10x+9=0 at A and B.find the equation of circle on Ab as diameter.

The intercept on the line y=x by the circle x^2+y^2-2x=0 is AB. Equation of the circle with AB as a diameter is

Let the line segment joining the centres of the circles x^2-2x+y^2=0 and x^2+y^2+4x+8y+16=0 intersect the another circle at P and Q respectively. Then the equation of the circle with PQ as its diameter is

Circle x ^(2) + y^(2)+6y=0 touches

Let the line segment joining the centres of the circles x^(2)-2x+y^(2)=0 and x^(2)+y^(2)+4x+8y+16=0 intersect the circles at P and Q respectively. Then the equation of the circle with PQ as its diameter is

If y+c=0 is a tangent to the circle x^2+y^2-6x-2y+1=0 at (a,4) then

If one of the diameters of the circle x^2+y^2-2x-6y+6=0 is a chord to the circle with centre (2,1), then the radius of the bigger circle is