The radius of the least circle passing through the point `(8, 4)` and cutting the circle `x^2+y^2=40` orthogonally is

The circle passing through the points (-2, 5), (0, 0) and intersecting x^2+y^2-4x+3y-2=0 orthogonally is

If a circle passes through the point (a,b) and cuts the circle x^(2) + y^(2) = 4 orthogonally , then the locus of its centre is

If a circle passes through the point (a,b) and cuts the circles x^(2) + y^(2) =4 orthogonally then the locus of its centre is

If a circle Passes through a point (a,b) and cut the circle x^2+y^2 = 4 orthogonally,Then the locus of its centre is

If a circle Passes through a point (1,2) and cut the circle x^2+y^2 = 4 orthogonally,Then the locus of its centre is

If a circle Passes through a point (1,2) and cut the circle x^2+y^2 = 4 orthogonally,Then the locus of its centre is

If a circle Passes through a point (1,0) and cut the circle x^2+y^2 = 4 orthogonally,Then the locus of its centre is