CBSE PHYSICS

[...] is the nature of beam of light produced by the lens. Draw a diagram to show this. Q. The refractive index of a dense flint glass is 1.65 and for alcohol it is 1.36 with respect to air. Find the [...]

[...] the normal as it meets the surface of rarer medium c) It goes straight d) None of these 5) Refractive index is the property of : a) One medium b) The pair of media c) One vacuum d) None of these 6) [...]

[...] as reciprocal of focal  length? Give reason. 10.A convex lens is made of a material of refractive index m1 when placed in a medium of refractive index m2, behaves as a diverging [...]

[...] angle of incidence and refraction are respectively 45° and 30°. Calculate the refractive index of second medium with respect to the first medium. 22.  A pond of depth 20 cm is filled with [...]

[...] ;           d) Sodium carbonate 32. Using a convex lens a student obtained a sharp image of the grill of a window in the laboratory on a screen. For [...]

[...] Example: 1 Calculate the minimum distance between object and its real image formed by convex lens of focal length F (a) f (b) 2f (c) 3f (d) 4f Answer: Let the distance between object and real [...]

[...] . a) Electric bulb b) electric cell c) battery 12. State any three differences between a convex lens and a concave lens. 13. State the factors responsible for the depletion of water table. 14. [...]

[...] it forms an image of 10 cm from the lens? Find the nature and size of the image formed. 7.A convex lens has a focal length of 30 cm. Calculate at what distance should the object be placed from the [...]

[...] Multiple Choice Questions : Physics Class X MAGNETIC EFFECTS OF ELECTRIC CURRENT 1.A magnetic field can exert force on (a)a moving magnet (b) stationary magnet  (c) moving charge (d)all of [...]

[...] beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field? Solution: Here , An electron [...]

[...] be induced in coil B? Give reason. (b) State the rule to determine the direction of a : (i) magnetic field produced around a straight conductor carrying current. (ii) force experienced by a current [...]

[...] orbiting nucleus. This motion of electrons produces magnetic effect. As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. 2. Does magnetic field always [...]

[...] CBSE PHYSICS CLASS X Very short Answer 1. What is radius of plane mirror? Ans: Infinity 2. What is angle of reflection for a ray falling normally on a plane mirror? [...]

Multiple Choice Questions : Reflection and Refraction 1. A ray of light strikes the surface of mirror at an angle of 300 with the mirror. The angle [...]

[...] ;  (d) none. 2.  An object 20cm high is placed at a distance of 100 cm from a plane mirror .The size of the image will be. (a)  20 cm        (b)  [...]

[...] to be higher than he actually is. Question: A man sits in a optician 's chair ,looking into a plane mirror which is 2m away from him and views the image of a chart which faces the mirror and is 50 cm [...]

[...] -the image of distant objects is focused before the retina) is corrected by using a concave lens of suitable power. 10. Presbyopia is the defect of human eye due to which an old person cannot [...]

[...] 10. Which of the following can produce a virtual image ? (A)  Plane mirror (B)  Concave lens (C)  Convex lens (D)  All of these 11. When a glass rod is rubbed with a piece of [...]

[...] of the following can produce a virtual image ? (A)  Plane mirror   (B)  Concave lens   (C)  Convex lens   (D)  All of these 11. When a glass rod is [...]

[...] -the image of distant objects is focused before the retina) is  corrected by using a concave lens of suitable power. 10. Presbyopia is the defect of human eye due to which an old person [...]

[...] echo? Q.20. Which part of the ear turns pressure variations into electrical signals? CBSE Pathshala: IX Chapter – Sound: Test Paper by JSUNIL TUTORIAL,...:                 JSUNIL [...]

[...] and delayed sunset? 15. Why sun appears white at noon? To see answer click link given below CBSE Pathshala: X Solved:The Human Eye and the Colorful World : [...]

Chapter: 17- Stars and The Solar System- Question bank for Class VIII(8th) 1. Which is the smallest planet of the solar system? 2. Which is the near [...]

Chapter: 17- Stars and The Solar System- Question bank for Class VIII(8th) 1. Which is the smallest planet of the solar system? 2. Which is the near [...]

[...] X unsolved) Solved Electricity numerical for class 10 Current Electricity Numerical solved MCQ physics 10th Chapter Electric current and its effects Electric current and its effects: An Introduction [...]

[...] ; Solved Electricity numerical for class 10  Current Electricity Numerical solved  MCQ physics 10th Chapter Electric current and its effects  Electric current and its effects: An [...]

[...] X unsolved) Solved Electricity numerical for class 10 Current Electricity Numerical solved MCQ physics 10th Chapter Electric current and its effects Electric current and its effects: An Introduction [...]

[...] X unsolved) Solved Electricity numerical for class 10 Current Electricity Numerical solved MCQ physics 10th Chapter Electric current and its effects Electric current and its effects: An Introduction [...]

[...] Eye and the Colorful World Human Eyes and Colorful world Guess Question solved X (10th) X CBSE PHYSICS Human Eyes Questions for Practice CBSE Class 10 Physics The Humane Eyes Study [...]

[...] Eye and the Colorful World Human Eyes and Colorful world Guess Question solved X (10th) X CBSE PHYSICS Human Eyes Questions for Practice CBSE Class 10 Physics The Humane Eyes Study [...]

[...] and the Colorful World Human Eyes and Colorful world Science Guess Question solved X (10th) X CBSE PHYSICS Human Eyes Questions for Practice CBSE Class 10 Physics The Humane Eyes Study Notes CBSE [...]

[...] (Reflection and Refraction) CBSE  Solved  Questions  For  X Reflection and Refraction CBSE  Solved  Self Preparation Questions   Reflection and Refraction) 10th [...]

[...] (Reflection and Refraction) CBSE  Solved  Questions  For  X Reflection and Refraction CBSE  Solved  Self Preparation Questions   Reflection and Refraction) 10th [...]

[...] (Reflection and Refraction) CBSE  Solved  Questions  For  X Reflection and Refraction CBSE  Solved  Self Preparation Questions   Reflection and Refraction) 10th [...]