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A lens placed between a candle and a screen forms a real triply magnified image of the candle on the screen. When the lens is moved away form the candle by 0.8 m without changing the
09
Oct
A lens placed between a candle and a screen forms a real triply magnified image of the candle on the screen. When the lens is moved away form the candle by 0.8 m without changing the A lens placed between a candle and a screen forms a real triply magnified image of the candle on [...]
A parallel beam of light is incident on a transparent sphere of refractive index n. If the beam finally gets focussed at a point situated at a distance = 2 * (radius of sphere) from the
09
Oct
A parallel beam of light is incident on a transparent sphere of refractive index n. If the beam finally gets focussed at a point situated at a distance = 2 * (radius of sphere) from the A parallel beam of light is incident on a transparent sphere of refractive index n. If the beam finally [...]
7.Through a rectangular field of length 90 m and breadth 60 m, two roads are constructed which are parallel to the sides and cut each other at right angles through the centre of the fields. If the width of each road is 3 m, find: (i) the area covered by the roads. (ii) the cost of constructing the roads at the rate of Rs. 110 per m^2.
09
Oct
7.Through a rectangular field of length 90 m and breadth 60 m, two roads are constructed which are parallel to the sides and cut each other at right angles through the centre of the fields. If the width of each road is 3 m, find: (i) the area covered by the roads. (ii) the cost [...]
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7.Through a rectangular field of length 90 m and breadth 60 m ,
find: (i) the area covered by the roads. (ii) the cost of constructing the roads at the rate of Rs. 110 per m^2. ,
two roads are constructed which are parallel to the sides and cut each other at right angles through the centre of the fields. If the width of each road is 3 m ,
6.Two cross roads, each of width 10 m, cut at right angles through the centre of a rectangular park of length 700 m and breadth 300 m and parallel to its sides. Find the area of the roads. Also find the area of the park excluding cross roads. Give the answer in hectares.
09
Oct
6.Two cross roads, each of width 10 m, cut at right angles through the centre of a rectangular park of length 700 m and breadth 300 m and parallel to its sides. Find the area of the roads. Also find the area of the park excluding cross roads. Give the answer in hectares. 16.How many [...]
A slab of material of refractive index 2 shown in figure has a curved surface APB of radius of curvature 10 cm and a plane surface CD. On the left of APB is air and on the right of CD is
09
Oct
A slab of material of refractive index 2 shown in figure has a curved surface APB of radius of curvature 10 cm and a plane surface CD. On the left of APB is air and on the right of CD is A slab of material of refractive index 2 shown in figure has a curved [...]
Quarter part of a transparent cylinder ABC of radius R is kept on a horizontal floor and a horizontal beam of light falls on the cylinder in the two different arrangement of cylinder as
09
Oct
Quarter part of a transparent cylinder ABC of radius R is kept on a horizontal floor and a horizontal beam of light falls on the cylinder in the two different arrangement of cylinder as Quarter part of a transparent cylinder ABC of radius R is kept on a horizontal floor and a horizontal beam of [...]
4.A verandah of width 2.25 m is constructed all along outside a room which is 5.5 m long and 4 m wide. Find: (i) the area of the verandah. (ii) the cost of cementing the floor of the verandah at the rate of Rs. 200 per m^2.
09
Oct
4.A verandah of width 2.25 m is constructed all along outside a room which is 5.5 m long and 4 m wide. Find: (i) the area of the verandah. (ii) the cost of cementing the floor of the verandah at the rate of Rs. 200 per m^2. 7.Find the perimeter of the adjoining figure which [...]
A pin is placed 10 cm in front of a convex lens of focal length 20 cm, made of material having refractive index 1.5. The surface of the lens farther away from the pin is silvered and has
09
Oct
A pin is placed 10 cm in front of a convex lens of focal length 20 cm, made of material having refractive index 1.5. The surface of the lens farther away from the pin is silvered and has A pin is placed 10 cm in front of a convex lens of focal length 20 cm [...]
A thin convex lens of refractive index mu = 1.5 is placed between a point source of light S and a screen A, as shown in the figure. Light rays from the source S are brought to focus
09
Oct
A thin convex lens of refractive index mu = 1.5 is placed between a point source of light S and a screen A, as shown in the figure. Light rays from the source S are brought to focus A thin convex lens of refractive index mu = 1.5 is placed between a point source of [...]
3.A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides. Find the total area of the margin.
09
Oct
3.A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides. Find the total area of the margin. 3.A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a margin [...]