1
IIT-JEE 2007 Paper 2 Offline
MCQ (Single Correct Answer)
+3
-1

Let $$\mathrm{ABCD}$$ be a quadrilateral with area 18 , with side $$\mathrm{A B}$$ parallel to the side $$\mathrm{C D}$$ and $$\mathrm{A B}=2 \mathrm{CD}$$. Let $$\mathrm{AD}$$ be perpendicular to $$\mathrm{AB}$$ and $$\mathrm{CD}$$. If a circle is drawn inside the quadrilateral ABCD touching all the sides, then its radius is :

A
3
B
2
C
$$\frac{3}{2}$$
D
1
2
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
$$\mathrm{A-(p),(q);B-(p),(q);C-(q),(r);D-(q),(r)}$$
3
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
4
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

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