If length of focal chord `P Q` is `l ,` and `p` is the perpendicular distance of `P Q` from the vertex of the parabola, then prove that `lprop1/(p^2)dot`

Prove that the length of a focal chord of a parabola varies inversely as the square of its distance from the vertex.

What are the points on the axis of x whose perpendicular distance from the straight line x/p + y/q = 1 is p?

Length of the focal chord of the parabola y^(2)=4ax at a distance p from the vertex is:

If the tangent at the extrenities of a chord PQ of a parabola intersect at T, then the distances of the focus of the parabola from the points P.T. Q are in

P is a point on the parabola y^(2)=4ax whose ordinate is equal to its abscissa and PQ is focal chord, R and S are the feet of the perpendiculars from P and Q respectively on the tangent at the vertex, T is the foot of the perpendicular from Q to PR, area of the triangle PTQ is

P and Q are two points on the axis and the perpendicular bisector respectively of an electric dipole. Both the points are far way from the dipole, and at equal distances from it. If vecE_(P) and vecE_(Q) are fields at P and Q ten

Consider the parabola y^(2)=8x, if the normal at a point P on the parabola meets it again at a point Q, then the least distance of Q from the tangent at the vertex of the parabola is

Find the electric field at a point P on the perpendicular bisector of a uniformly charged rod. The lengthof the rod is L, the charge on it is Q and the distance of P from the centre of the rod is a.