NCERT Solutions
Class 11 Maths
Conic Sections
Electric charges

Ex.11.1

Find the equation of the circle with centre (0, 2) and radius 2.

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Ex.11.1 Q.2

Find the equation of the circle with centre (–2, 3) and radius 4.

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Ex.11.1 Q.3

Find the equation of the circle with centre ( , ) and radius .

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Ex.11.1 Q.4

Find the equation of the circle with centre (1, 1) and radius √2.

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Ex.11.1 Q.5

Find the equation of the circle with centre (–a, –b) and radius √ (a2 − b2).

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Ex.11.1 Q.6

Find the centre and radius of the circle (x + 5)2 + (y – 3)2 = 36

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Ex.11.1 Q.7

Find the centre and radius of the circle x2 + y2 – 4x – 8y – 45 = 0

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Ex.11.1 Q.8

Find the centre and radius of the circle x2 + y2 – 8x + 10y – 12 = 0

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Ex.11.1 Q.9

Find the centre and radius of the circle 2x2 + 2y2 – x = 0

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Ex.11.1 Q.10

Find the equation of the circle passing through the points (4, 1) and (6, 5) and whose centre is on the line 4x + y = 16.

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Ex.11.1 Q.11

Find the equation of the circle passing through the points (2, 3) and (–1, 1) and whose centre is on the line x – 3y – 11 = 0.

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Ex.11.1 Q.12

Find the equation of the circle with radius 5 whose centre lies on x-axis and passes through the point (2, 3).

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Ex.11.1 Q.13

Find the equation of the circle passing through (0, 0) and making intercepts a and b on the coordinate axes.

 

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Ex.11.1 Q.14

Find the equation of a circle with centre (2, 2) and passes through the point (4, 5).

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Ex.11.1 Q.15

Does the point (–2.5, 3.5) lie inside, outside or on the circle x2 + y2 = 25?

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Ex.11.2 Q.1

Find the coordinates of the focus, axis of the parabola, the equation of directrix and the length of the latus rectum for y2 = 12x.

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Ex.11.2 Q.2

Find the coordinates of the focus, axis of the parabola, the equation of directrix and the length of the latus rectum for x2 = 6y.

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Ex.11.2 Q.3

Find the coordinates of the focus, axis of the parabola, the equation of directrix and the length of the latus rectum for y2 = – 8x.

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Ex.11.2 Q.4

Find the coordinates of the focus, axis of the parabola, the equation of directrix and the

length of the latus rectum for x2 = – 16y.

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Ex.11.2 Q.5

Find the coordinates of the focus, axis of the parabola, the equation of directrix and the length of the latus rectum for y2 = 10x.

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Ex.11.2 Q.6

Find the coordinates of the focus, axis of the parabola, the equation of directrix

and the length of the latus rectum for x2 = –9y.

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Ex.11.2 Q.7

Find the equation of the parabola that satisfies the following conditions:

Focus (6, 0); directrix x = –6.

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Ex.11.2 Q.8

Find the equation of the parabola that satisfies the following conditions: Focus (0, –3); directrix y = 3.

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Ex.11.2 Q.9

Find the equation of the parabola that satisfies the following conditions: Vertex (0, 0); focus (3, 0).

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Ex.111.2 Q.10

Find the equation of the parabola that satisfies the following conditions: Vertex (0, 0), focus (–2, 0).

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Ex.11.2 Q.11

Find the equation of the parabola that satisfies the following conditions: Vertex (0, 0) passing through (2, 3)

and axis is along x-axis.

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Ex.11.2 Q.12

Find the equation of the parabola that satisfies the following conditions:

Vertex (0, 0), passing through (5, 2) and symmetric with respect to y-axis.

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Ex.11.3 Q.1

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.1

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis, the eccentricity

and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.3

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.4

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.5

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.6

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse x2 + y2 = 1.

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Ex.11.3 Q.7

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse 36x2 + 4y2 = 144.

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Ex.11.3 Q.8

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse 16x2 + y2 = 16.

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Ex.11.3 Q.9

Find the coordinates of the foci, the vertices, the length of major axis, the minor axis,

the eccentricity and the length of the latus rectum of the ellipse 4x2 + 9y2 = 36.

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Ex.11.3 Q.10

Find the equation for the ellipse that satisfies the given conditions: Vertices (±5, 0), foci (±4, 0).

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Ex.11.3 Q.11

Find the equation for the ellipse that satisfies the given conditions:

Vertices (0, ±13),             

foci (0, ±5).

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Ex.11.3 Q.12

Find the equation for the ellipse that satisfies the given conditions: Vertices (±6, 0), foci (±4, 0).

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Ex.11.3 Q.13

Find the equation for the ellipse that satisfies the given conditions:

Ends of major axis (±3, 0), ends of minor axis (0, ±2).

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Ex.11.3 Q.14

Find the equation for the ellipse that satisfies the given conditions:

Ends of major axis (0, ±√5), ends of minor axis (±1, 0)

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Ex.11.3 Q.15

Find the equation for the ellipse that satisfies the given conditions: Length of major axis 26, foci (±5, 0).

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Ex.11.3 Q.16

Find the equation for the ellipse that satisfies the given conditions: Length of minor axis 16, foci (0, ±6).

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Ex.11.3 Q.17

Find the equation for the ellipse that satisfies the given conditions: foci (±3, 0), a = 4.

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Ex.11.3 Q.18

Find the equation for the ellipse that satisfies the given conditions: b = 3, c = 4, centre at the origin; foci on the x axis.

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Ex.11.3 Q.19

Find the equation for the ellipse that satisfies the given conditions:

Centre at (0, 0), major axis on the y-axis and passes through the points (3, 2) and (1, 6).

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Ex.11.3 Q.20

Find the equation for the ellipse that satisfies the given conditions:

Major axis on the x -axis and passes through the points (4, 3) and (6, 2).

 

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Ex.11.4 Q.1

Find the coordinates of the foci and the vertices, the eccentricity,

and the length of the latus rectum of the hyperbola x2- y2 = 1.

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Ex.11.4 Q.2

Find the coordinates of the foci and the vertices, the eccentricity, and the length

of the latus rectum of the hyperbola y2 - x2 = 1.

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Ex.11.4 Q.3

Find the coordinates of the foci and the vertices, the eccentricity,

and the length of the latus rectum of the hyperbola 9y2 - 4x2 = 36.

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Ex.11.4 Q.4

Find the coordinates of the foci and the vertices, the eccentricity,

and the length of the latus rectum of the hyperbola 16x2 – 9y2 = 576.

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Ex.11.4 Q.5

Find the coordinates of the foci and the vertices, the eccentricity, and the

length of the latus rectum of the hyperbola 5y2 - 9x2 = 36.

 

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Ex.11.4 Q.6

Find the coordinates of the foci and the vertices, the eccentricity, and the length of

the latus rectum of the hyperbola 49y2 - 16x2 = 784.

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Ex.11.4 Q.7

Find the equation of the hyperbola satisfying the give conditions: Vertices (±2, 0), foci (±3, 0).

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Ex.11.4 Q.8

Find the equation of the hyperbola satisfying the give conditions: Vertices (0, ±5), foci (0, ±8).

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Ex11.4 Q.9

Find the equation of the hyperbola satisfying the give conditions: Vertices (0, ±3), foci (0, ±5).

 

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Ex.11.4 Q.10

Find the equation of the hyperbola satisfying the give conditions: foci (±5, 0), the transverse axis is of length 8.

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Ex.11.4 Q.11

Find the equation of the hyperbola satisfying the give conditions: foci (0, ±13), the conjugate axis is of length 24.

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Ex.11.4 Q.12

Find the equation of the hyperbola satisfying the give conditions: Foci (±3√5, 0), the latus rectum is of length 8.

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Ex.11.4 Q.13

Find the equation of the hyperbola satisfying the give conditions: Foci (±4, 0), the latus rectum is of length 12.

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Ex.11.4 Q.14

Find the equation of the hyperbola satisfying the give conditions: Vertices (±7, 0), e = .

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Ex.11.4 Q.15

Find the equation of the hyperbola satisfying the give conditions: Foci (0, ±√10), passing through (2, 3).

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Ex.Misc. Q.1

If a parabolic reflector is 20 cm in diameter and 5 cm deep, find the focus.

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Ex.Misc. Q.2

An arch is in the form of a parabola with its axis vertical.

The arch is 10 m high and 5 m wide at the base. How wide is it 2 m from the vertex of the parabola?

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Ex.Misc. Q.3

The cable of a uniformly loaded suspension bridge hangs in the form of a parabola.

The road way which is horizontal and 100 m long is supported by vertical wires attached to the cable,

the longest wire being 30 m and the shortest being 6 m.

Find the length of a supporting wire attached to the roadway 18 m from the middle.

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Ex.11.4 Q.4

An arch is in the form of a semi-ellipse. It is 8 m wide and 2 m high at the centre.

Find the height of the arch at a point 1.5 m from one end.

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Ex.Misc. Q.5

A rod of length 12 cm moves with its ends always touching the coordinate axes.

Determine the equation of the locus of a point P on the rod, which is 3 cm from the end in contact with the x-axis.

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Ex.Misc. Q.6

Find the area of the triangle formed by the lines joining the vertex of the parabola x2 = 12y to the ends of its latus rectum.

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Ex.Misc.Q.7

A man running a racecourse note that the sum of the distances from the two flag posts form him is always 10 m

and the distance between the flag posts is 8 m. find the equation of the posts traced by the man.

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Ex.Misc.Q.7

An equilateral triangle is inscribed in the parabola y2 = 4 ax, where one vertex is at the vertex of the parabola.

Find the length of the side of the triangle.

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Complete NCERT Solutions: Classes 6 to 12, All Chapters

NCERT Solution for class 6
NCERT Solution for class 7
NCERT Solution for class 8
NCERT Solution for class 9
NCERT Solution for class 10
NCERT Solution for class 11
NCERT Solution for class 12

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