1
IIT-JEE 2007 Paper 2 Offline
MCQ (Single Correct Answer)
+4
-0

Match the statements in Column I with the properties Column II.

Column I Column II
(A) Two intersecting circles (P) have a common tangent
(B) Two mutually external circles (Q) have a common normal
(C) Two circles, one strictly inside the other (R) do not have a common tangent
(D) Two branches of a hyperbola (S) do not have a common normal

A
$$\mathrm{A-(p);B-(p),(q);C-(q),(r);D-(q)}$$
B
$$\mathrm{A-(p),(q);B-(q);C-(r);D-(q),(r)}$$
C
$$\mathrm{A-(q);B-(p),(q);C-(q),(r);D-(r)}$$
D
$$\mathrm{A-(p),(q);B-(p),(q);C-(q),(r);D-(q),(r)}$$
2
IIT-JEE 2007 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

Tangents are drawn from the point (17, 7) to the circle $$x^2+y^2=169$$.

Statement 1 : The tangents are mutually perpendicular.

Statement 2 : The locus of the points from which mutually perpendicular tangents can be drawn to the given circle is $$x^2+y^2=338$$

A
Statement 1 is True, Statement 2 is True, Statement 2 is a CORRECT explanation for Statement 1
B
Statement 1 is True, Statement 2 is True, Statement 2 is NOT a CORRECT explanation for Statement 1
C
Statement 1 is True, Statement 2 is False
D
Statement 1 is False, Statement 2 is True
3
IIT-JEE 2006
MCQ (Single Correct Answer)
+3
-1

A circle touches the line $L$ and the circle $C_1$ externally such that both the circles are on the same side of the line, then the locus of center of the circle is:

A

ellipse

B

hyperbola

C

parabola

D

parts of straight line

4
IIT-JEE 2006
MCQ (Single Correct Answer)
+3
-1

Let ABCD be a square of side length 2 units. $\mathrm{C}_2$ is the circle through vertices $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}$ and $\mathrm{C}_1$ is the circle touching all the sides of the square ABCD . L is a line through A.

A line $M$ through $A$ is drawn parallel to $B D$. Point $S$ moves such that its distances from

the line BD and the vertex A are equal. If locus of S cuts M at $\mathrm{T}_2$ and $\mathrm{T}_3$ and AC at $\mathrm{T}_1$, then area of $\Delta T_1 T_2 T_3$ is :

A

$\frac{1}{2}$ sq. units

B

$\frac{2}{3}$ sq. units

C

1 sq. unit

D

2 sq. units

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