Maths-
General
Easy
Question
Let 
, then the ad joint of A is
- None of these
The correct answer is: None of these
.
Related Questions to study
chemistry-
If there be a compound of the formula 
which one of the following compounds would be obtained form it without treatment with any reagent?
If there be a compound of the formula which one of the following compounds would be obtained form it without treatment with any reagent?
chemistry-General
physics-
An object ‘O’ is placed infront of a small plane mirrorM1 and a large convex mirrorM2 of focal length f The distance between ‘O’ and M1 is x and the distance between M1 and M2 is y The image of ‘O’ formed by M1 and M2 coincide The magnitude of ‘f’ is
An object ‘O’ is placed infront of a small plane mirrorM1 and a large convex mirrorM2 of focal length f The distance between ‘O’ and M1 is x and the distance between M1 and M2 is y The image of ‘O’ formed by M1 and M2 coincide The magnitude of ‘f’ is
physics-General
physics-
Consider a disc rotating in the horizontal plane with a constant angular speed 
about its centre 
. The disc has a shaded region on one side of the diameter and an unshanded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles 
and 
are simultaneously projected at an angle towards 
. The velocity of projection is in the 
plane and is same for both pebbles with respect to the disc. Assume that i) they land back on the disc before the disc has completed 
rotation. ii) their range is less than half the disc radius, and iii) remains constant throughout. Then
Consider a disc rotating in the horizontal plane with a constant angular speed about its centre . The disc has a shaded region on one side of the diameter and an unshanded region on the other side as shown in the figure. When the disc is in the orientation as shown, two pebbles and are simultaneously projected at an angle towards . The velocity of projection is in the plane and is same for both pebbles with respect to the disc. Assume that i) they land back on the disc before the disc has completed rotation. ii) their range is less than half the disc radius, and iii) remains constant throughout. Then
physics-General
physics-
The resultant of a system of forces shown in figure is a force of 10 N parallel to given forces through , where 
equals
The resultant of a system of forces shown in figure is a force of 10 N parallel to given forces through , where equals
physics-General
chemistry-
On reacting with neutral ferric chloride, phenol gives
On reacting with neutral ferric chloride, phenol gives
chemistry-General
physics-
An air bubble in glass (m =1.5) is situated at a distance 3 cm from a convex surface of diameter 10 cm as shown The distance from surface at which the image of bubble appears is
An air bubble in glass (m =1.5) is situated at a distance 3 cm from a convex surface of diameter 10 cm as shown The distance from surface at which the image of bubble appears is
physics-General
physics-
The fig shows a mixture of blue, green, red colours incident on a right angled prism The critical angles of the material of prism for red, green and blue colours are 460 , 440 , 430 respectively, The arrangement will separate
The fig shows a mixture of blue, green, red colours incident on a right angled prism The critical angles of the material of prism for red, green and blue colours are 460 , 440 , 430 respectively, The arrangement will separate
physics-General
chemistry-
Ethanol reacts with thionyl chloride to give ethyl chloride and:
Ethanol reacts with thionyl chloride to give ethyl chloride and:
chemistry-General
physics-
The minimum speed for a particle at the lowest point of a vertical circle of radius 
, to describe the circle is 
. If the radius of the circle is reduced to one-fourth its value, the corresponding minimum speed will be
The minimum speed for a particle at the lowest point of a vertical circle of radius , to describe the circle is . If the radius of the circle is reduced to one-fourth its value, the corresponding minimum speed will be
physics-General
chemistry-
Scientific aspect of fermentation was first studied by:
Scientific aspect of fermentation was first studied by:
chemistry-General
physics-
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure A small object is placed on the principal axis of the combination, at a distance of 30 cm in front of the mirror The magnification of the image is
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure A small object is placed on the principal axis of the combination, at a distance of 30 cm in front of the mirror The magnification of the image is
physics-General
physics-
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The combination behaves like
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The combination behaves like
physics-General
physics-
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The focal length of the combination has the magnitude
The convex surface of a thin concav–convex lens of glass of refractive index 1.5 has a radius of curvature of 20 cm The concave surface has a radius of curvature of 60 cm The convex side is silvered and placed on a horizontal surface as shown in the figure The focal length of the combination has the magnitude
physics-General
physics-
A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Separation between the images is
A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Separation between the images is
physics-General
physics-
A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Number of images found is
A point object O is placed at a distance of 0.3 m from a convex lens of focal length 0.2m It is then cut into two halves each of which is displaced by 0.0005 m as shown in figure
Number of images found is
physics-General
