Circles are drawn with diameter being any focal chord of the parabola `y^2-4x-y-4=0` with always touch a fixed line. Find its equation.

Circle dawn with diameter as a focal chord of the parabola y^(2)-4x-y-4=0 which always touch the a line 16x+k=0 then the numerical value of 'k' must be

Circle dawn with diameter as a focal chord of the parabola y^(2)-4x-y-4=0 which always touch the a line 16x+k=0 then the numerical value of k must be

Circles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10=0 will touch a fixed line whose equation is

Cicles drawn on the diameter as focal distance of any point lying on the parabola x^(2)-4x+6y+10 =0 will touch a fixed line whoose equation is -

The focal chord of the parabola y^(2)=ax is 2x-y-8=0. Then find the equation of the directrix.

A circle is drawn with its centre on the line x+y=2 to touch the line 4x-3y+4=0 and pass throughthe point (0,1). Find its equation.

The locus of the centre of the circle described on any focal chord of the parabola y^(2)=4ax as the diameter is

The locus of the middle points of the focal chords of the parabola,y^(2)=4x is:

The circle drawn with variable chord x+ay-5=0 (a being a parameter) of the parabola y2 = 20x as diameter will always touch the line

The circle drawn with variable chord x+ay-5=0 (a being a parameter) of the parabola y^(2)=20x as diameter will always touch the line (A)x+5=0 (B) y+5=0 (C) x+y+5=0 (D) x-y+5=0