Physics-
General
Easy
Question
A particle is dropped to move along the axis of a concave mirror of focal length f from a height f/2 as shown in the figure The acceleration due to gravity is g Find the maximum speed of the image
The correct answer is:
Related Questions to study
physics-
The co-ordinates of image of point object P formed after two successive reflection in situation as shown in figure considering first reflection at concave mirror and then at convex
The co-ordinates of image of point object P formed after two successive reflection in situation as shown in figure considering first reflection at concave mirror and then at convex
physics-General
physics-
A beam of light strikes one mirror of a right angle mirror assembly at an angle of incidence 450 as shown in the figure The right angle mirror assembly is rotated such that the angle of incidence becomes 600 Which of the following statements is (are) correct about the emerging light beam
A beam of light strikes one mirror of a right angle mirror assembly at an angle of incidence 450 as shown in the figure The right angle mirror assembly is rotated such that the angle of incidence becomes 600 Which of the following statements is (are) correct about the emerging light beam
physics-General
physics-
A boy is walking under an inclined mirror at a constant velocity V m/s along the X axis as shown in figure If the mirror is inclined at an angle q with the horizontal then what is the velocity of the image?
A boy is walking under an inclined mirror at a constant velocity V m/s along the X axis as shown in figure If the mirror is inclined at an angle q with the horizontal then what is the velocity of the image?
physics-General
maths-
Let 
, then the ad joint of A is
Let , then the ad joint of A is
maths-General
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
