A variable straight line is drawn from a fixed point `O` meeting a fixed circle in `P` and a point `Q` is taken on this line such that `OP. OQ` is constant, then locus of `Q` is : (A) a straight line (B) a circle (C) a parabola (D) none of these

A straight line is drawn from a fixed point O meeting a fixed straight line in P . A point Q is taken on the line OP such that OP.OQ is constant. Show that the locus of Q is a circle.

|z-4|+|z+4|=16 where z is as complex number ,then locus of z is (A) a circle (B) a straight line (C) a parabola (D) none of these

The locus of the point at which two given unequal circles subtend equal angles is: (A) a straight line(B) a circle (C) a parabola (D) an ellipse

The locus of the point (sqrt(3h),sqrt(sqrt(3)k+2)) if it lies on the line x-y-1=0 is straight line (b) a circle a parabola (d) none of these

If Re((2z+1)/(iz+1))=1 , the the locus of the point representing z in the complex plane is a (A) straight line (B) circle (C) parabola (D) none of these

A variable chord of circle x^(2)+y^(2)=4 is drawn form the point P(3,5) meeting the circle at the point A and B. A point Q is taken on this chord such that 2PQ=PA+PB. Locus of point 'Q' is

If a DeltaABC remains always similar to a given triangle and the point A is fixed and the point B always moves on a given straight line, then locus of C is (A) a circle (B) a straight line (C) a parabola (D) none of these

A given line L_1 cut x and y-axes at P and Q respectively and has intercepts a and b/2 on x and y-axes respectively. Let another line L_2 perpendicular to L_1 cut x and y-axes at R and S respectively. Let T be the point of intersection of PS and QR . A straight line passes through the centre of locus of T . Then locus of the foot of perpendicular to it from origin is : (A) a straight line (B) a circle (C) a parabola (D) none of these