Qus : 2
4
For the two circles x 2 + y 2 = 16 and x 2 + y 2 − 2 y = 0 , there is/are
1
One pair of common tangents
2
Two pair of common tangents
3
Three pair of common tangents
4
No common tangents
Go to Discussion
Qus : 3
2
The number of common tangents to the circle x 2 + y 2 = 4 and x 2 + y 2 − 6 x − 8 y = 24 is
1
0
2
1
3
3
4
4
Go to Discussion
Solution
Qus : 4
1
The point of intersection os circle
and the line
is
1
(-6, 3)
2
(3,-6)
3
(6,-3)
4
(-3,6)
Go to Discussion
Solution
Qus : 5
3
The circles whose equations are
and
will touch one another externally, if
1
2
3
4
None of these
Go to Discussion
Solution
Qus : 6
4
A circle with its center in the first quadrant touches both the coordinate axes and the line
x -y - 2 = 0. Then the area of the circle is
1
π 2
2
4 π
3
π
4
2 π
Go to Discussion
Solution
Qus : 7
3
The circle x 2 + y 2 + α x + β y + γ = 0 is the image of the circle x 2 + y 2 − 6 x − 10 y + 30 = 0 across
the line 3x + y = 2. The value of [ α + β + γ ] is (where [.] represents the floor function.)
1
20
2
22
3
23
4
21
Go to Discussion
Solution
Qus : 9
2
Find the number of point(s) of intersection of the
ellipse
and the circle x
2 + y
2 = 4
1
4
2
3
3
2
4
1
Go to Discussion
Solution
Qus : 10
1
A circle touches the X-axis and also touches another circle with centre at (0, 3) and radius 2.
Then the locus of the centre of the first circle is
1
a parabola
2
a hyperbola
3
a circle
4
an ellipse
Go to Discussion
Solution
Qus : 11
1
The radius of the circle passing through the foci of the ellipse x 2 16 + y 2 9 and having it centre
at (0, 3) is
1
4 units
2
3 units
3
√ 12 units
4
7 2 units
Go to Discussion
Solution
Qus : 12
2
If two circles
x 2 + y 2 + 2 g x + 2 f y = 0 and x 2 + y 2 + 2 g ′ x + 2 f ′ y = 0 touch each other then whichof the following is true?
1
g f = g ′ f ′
2
g ′ f = g f ′
3
g g ′ = f f ′
4
None of these
Go to Discussion
Solution
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