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A point object is placed at a distance of 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and
09
Oct
A point object is placed at a distance of 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and A point object is placed at a distance of 25 cm from a convex lens of focal length [...]
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 10 cm from the lens. If the lens is removed, the point where
09
Oct
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 10 cm from the lens. If the lens is removed, the point where A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at [...]
The observer O sees the distance AB as infinitely large. If refractive index of liquid is mu1 and that of glass is mu 2, then mu 1/mu 2 is
09
Oct
The observer O sees the distance AB as infinitely large. If refractive index of liquid is mu1 and that of glass is mu 2, then mu 1/mu 2 is The observer O sees the distance AB as infinitely large. If refractive index of liquid is mu1 and that of glass is mu 2 then mu [...]
A convex lens of focal length 1.5 m is placed in a system of coordinate axis such that its optical centre is at origin and principal axis coinciding with the x axis. An object and
09
Oct
A convex lens of focal length 1.5 m is placed in a system of coordinate axis such that its optical centre is at origin and principal axis coinciding with the x axis. An object and A convex lens of focal length 1.5 m is placed in a system of coordinate axis such that its optical [...]
11.A circle of radius 2 cm is cut out from a square piece of an aluminium sheet of side 6 cm. What is the area of the left over aluminium sheet? (Take π = 3.14)
09
Oct
11.A circle of radius 2 cm is cut out from a square piece of an aluminium sheet of side 6 cm. What is the area of the left over aluminium sheet? (Take π = 3.14) 11.A circle of radius 2 cm is cut out from a square piece of an aluminium sheet of side 6 [...]
10.From a circular card sheet of radius 14 cm, two circles of radius 3.5 cm and a rectangle of length 3 cm and breadth 1 cm are removed (as shown in the adjoining figure). Find the area of the remaining sheet. (Take π = 22/7)
09
Oct
10.From a circular card sheet of radius 14 cm, two circles of radius 3.5 cm and a rectangle of length 3 cm and breadth 1 cm are removed (as shown in the adjoining figure). Find the area of the remaining sheet. (Take π = 22/7) 10.From a circular card sheet of radius 14 cm two [...]
9. Shazli took a wire of length 44 cm and bent it into the shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, the circle or the square? (Take π = 22/7)
09
Oct
9. Shazli took a wire of length 44 cm and bent it into the shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, [...]
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9.Shazli took a wire of length 44 cm and bent it into the shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square ,
the circle or the square? (Take π = 22/7) ,
what will be the length of each of its sides? Which figure encloses more area ,
8.Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs. 15/m^2. (Take π = 3.14)
09
Oct
8.Find the cost of polishing a circular table-top of diameter 1.6 m, if the rate of polishing is Rs. 15/m^2. (Take π = 3.14) 8.Find the cost of polishing a circular table-top of diameter 1.6 m if the rate of polishing is Rs. 15/m^2. (Take π = 3.14) October 9, 2020 Category: Chapter 11 - [...]
7.Find the perimeter of the adjoining figure, which is a semicircle including its diameter.
09
Oct
7.Find the perimeter of the adjoining figure, which is a semicircle including its diameter. 7.Find the perimeter of the adjoining figure which is a semicircle including its diameter. October 9, 2020 Category: Chapter 11 - Perimeter and Area , Maths , NCERT Class 7 ,
A point object is placed at a distance 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and object
09
Oct
A point object is placed at a distance 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and object A point object is placed at a distance 25 cm from a convex lens of focal length 20 [...]