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9.The adjoining figure represents a rectangular lawn with a circular flower bed in the middle. Find: (i) the area of the whole land. (ii) the area of the flower bed. (iii) the area of the lawn excluding the area of the flower bed. (iv) the circumference of the flower bed.
09
Oct
9.The adjoining figure represents a rectangular lawn with a circular flower bed in the middle. Find: (i) the area of the whole land. (ii) the area of the flower bed. (iii) the area of the lawn excluding the area of the flower bed. (iv) the circumference of the flower bed. 16.How many times a wheel [...]
A biconvex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2 Both the curved surfaces
09
Oct
A biconvex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2 Both the curved surfaces A biconvex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of [...]
A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10 cm. A small object is kept at a distance of 30 cm from the lens.
09
Oct
A biconvex lens of focal length 15 cm is in front of a plane mirror. The distance between the lens and the mirror is 10 cm. A small object is kept at a distance of 30 cm from the lens. A biconvex lens of focal length 15 cm is in front of a plane mirror. [...]
An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears
09
Oct
An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears An observer looks at a distance tree of height 10 m with a telescope of magnifying power of 20. To the observer the trees appears October 9, 2020 Category: Uncategorised [...]
Pragya wrapped a cord around a circular pipe of radius 4 cm(adjoining figure) and cut off the length required of the cost. Then she wrapped it around a square box of side 4 cm(also shown). Did she have any cord left?(Take π=3.14)
09
Oct
Pragya wrapped a cord around a circular pipe of radius 4 cm(adjoining figure) and cut off the length required of the cost. Then she wrapped it around a square box of side 4 cm(also shown). Did she have any cord left?(Take π=3.14) 16.How many times a wheel of radius 28 cm must rotate to go [...]
A thin convex lens made from crown glass ( mu = 3/2) has focal length f. When it is measured in two different liquids having refractive indices 4/3 and root 3/2, it has the focal lengths
09
Oct
A thin convex lens made from crown glass ( mu = 3/2) has focal length f. When it is measured in two different liquids having refractive indices 4/3 and root 3/2, it has the focal lengths A thin convex lens made from crown glass ( mu = 3/2) has focal length f. When it is [...]
Diameter of plano-convex is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 2 * 10^8 m/s, the focal length of the lens is
09
Oct
Diameter of plano-convex is 6 cm and thickness at the centre is 3 mm. If speed of light in material of lens is 2 * 10^8 m/s, the focal length of the lens is Diameter of plano-convex is 6 cm and thickness at the centre is 3 mm. If speed of light in material of [...]
An object 2.4 m infront of a lens forms a sharp image on a film 12 cm behind the lens. A glass plate 1 cm thick, of refractive index 1.50, is interposed between lens and film with
09
Oct
An object 2.4 m infront of a lens forms a sharp image on a film 12 cm behind the lens. A glass plate 1 cm thick, of refractive index 1.50, is interposed between lens and film with An object 2.4 m infront of a lens forms a sharp image on a film 12 cm behind [...]
Two thin similar watch glass pieces are joined together, front to front, with rear portion silvered and the combination of glass pieces is placed at a distance a = 60 cm from a screen.
09
Oct
Two thin similar watch glass pieces are joined together, front to front, with rear portion silvered and the combination of glass pieces is placed at a distance a = 60 cm from a screen. front to front Two thin similar watch glass pieces are joined together with rear portion silvered and the combination of glass [...]
Consider a beam expander which consists of two converging lenses of focal lengths 40 cm and 100 cm having a common optical axis. A laser beam of diameter 4 mm is incident
09
Oct
Consider a beam expander which consists of two converging lenses of focal lengths 40 cm and 100 cm having a common optical axis. A laser beam of diameter 4 mm is incident Consider a beam expander which consists of two converging lenses of focal lengths 40 cm and 100 cm having a common optical axis. [...]