Saved Bookmarks
This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Defenitions of (i)Scattering of light (ii) Tyndall effect by the term "colloidal particles" in the definition of tyndall effect, what do we mean? Does it include particles such as air molecules, water droplets, dust particles, or just the colloidal particles found in colloids? |
|
Answer» Defenitions of (i)Scattering of light (ii) Tyndall effect by the term "colloidal particles" in the definition of tyndall effect, what do we mean? Does it include particles such as air molecules, water droplets, dust particles, or just the colloidal particles found in colloids? |
|
| 2. |
Details of nuclei of three atoms A, B and C are given as- A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars? |
|
Answer» Details of nuclei of three atoms A, B and C are given as- A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars? |
|
| 3. |
The cold air layers of the atmosphere behave as optically |
|
Answer» The cold air layers of the atmosphere behave as optically |
|
| 4. |
The lens A has a focal length of 25 cm whereas another lens B has a focal length of 60 cm. Giving reason state, which lens has more power : A or B. |
|
Answer» The lens A has a focal length of 25 cm whereas another lens B has a focal length of 60 cm. Giving reason state, which lens has more power : A or B. |
|
| 5. |
State and explain the laws of reflection of light at a plane surface (like a plane mirror), with the help of a labelled ray-diagram. Mark the angles of 'incidence' and 'reflection' clearly on the diagram. If the angle of reflection is 47.5∘, what will be the angle of incidence ? |
|
Answer» State and explain the laws of reflection of light at a plane surface (like a plane mirror), with the help of a labelled ray-diagram. Mark the angles of 'incidence' and 'reflection' clearly on the diagram. If the angle of reflection is 47.5∘, what will be the angle of incidence ? |
|
| 6. |
A large concave mirror has a radius of curvature of 1.5 m. A person stands 10 m in front of the mirror. Where is the person's image? |
|
Answer» A large concave mirror has a radius of curvature of 1.5 m. A person stands 10 m in front of the mirror. Where is the person's image? |
|
| 7. |
A glass slab of thickness 3 cm and refractive index 32 cm is placed above an ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be |
|
Answer» A glass slab of thickness 3 cm and refractive index 32 cm is placed above an ink mark on a piece of paper. For a person looking at the mark at a distance 5.0 cm above it, the distance of the mark will appear to be |
|
| 8. |
Two satellites of masses 3m and m orbit the earth in circular orbits of radii r and 3r respectively. The ratio of their orbital speeds is |
|
Answer» Two satellites of masses 3m and m orbit the earth in circular orbits of radii r and 3r respectively. The ratio of their orbital speeds is |
|
| 9. |
What is the flow of charge called? |
|
Answer» What is the flow of charge called? |
|
| 10. |
The chief energy transformation that occurs in an electric cell (primary) is |
|
Answer» The chief energy transformation that occurs in an electric cell (primary) is |
|
| 11. |
Why does the sun appear red at sunrise ? |
| Answer» Why does the sun appear red at sunrise ? | |
| 12. |
How is bio-technology used in brewing industry? |
|
Answer» How is bio-technology used in brewing industry? |
|
| 13. |
The unit for measuring intensity is |
|
Answer» The unit for measuring intensity is |
|
| 14. |
How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid? |
|
Answer» How is the magnetic field due to a solenoid carrying current affected if a soft iron bar is introduced inside the solenoid? |
|
| 15. |
Does SHC for a substance always remain constant or does it change with the change in the temperature of an object? If yes, why does that happen? |
| Answer» Does SHC for a substance always remain constant or does it change with the change in the temperature of an object? If yes, why does that happen? | |
| 16. |
Which of the following is true regarding nuclear force? |
|
Answer» Which of the following is true regarding nuclear force? |
|
| 17. |
The equivalent resistance between A and B is: |
|
Answer» The equivalent resistance between A and B is:
|
|
| 18. |
For what kind of defect a person is asked to wear bifocal lens |
|
Answer» For what kind of defect a person is asked to wear bifocal lens |
|
| 19. |
What is the function of the grid in cathode ray tube? |
| Answer» What is the function of the grid in cathode ray tube? | |
| 20. |
Question 9 A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure. The direction of magnetic field at a point will be north to south (a) directly above the wire (b) directly below the wire (c) at a point located in the plane of the paper, on the north side of the wire (d) at a point located in the plane of the paper, on the south side of the wire |
|
Answer» Question 9 A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in Figure. The direction of magnetic field at a point will be north to south (a) directly above the wire (b) directly below the wire (c) at a point located in the plane of the paper, on the north side of the wire (d) at a point located in the plane of the paper, on the south side of the wire 
|
|
| 21. |
Which of the following can make a parallel beam (a) concave mirror as well as concave lens (b) convex mirror as well as convex lens (c) concave mirror as well as convex lens (d) convex mirror as well as concave lens |
|
Answer» Which of the following can make a parallel beam (a) concave mirror as well as concave lens (b) convex mirror as well as convex lens (c) concave mirror as well as convex lens (d) convex mirror as well as concave lens |
|
| 22. |
Three resistors R1= 1 Ω , R2 = 100 Ω , R3 = 1000 Ω are connected in parallel. Which relation holds true? |
|
Answer» Three resistors R1= 1 Ω , R2 = 100 Ω , R3 = 1000 Ω are connected in parallel. Which relation holds true? |
|
| 23. |
A ship sends a sonar wave to the sea bed which is flat and measured several times over a large area. One day the reflected sound wave takes longer time than in previous measurements. The possible reason can be: |
|
Answer» A ship sends a sonar wave to the sea bed which is flat and measured several times over a large area. One day the reflected sound wave takes longer time than in previous measurements. The possible reason can be: |
|
| 24. |
2 cm long pin is placed perpendicular to the principal axis of a lens of focal length 15 cm at a distance of 25 centimetres from the lens find the position of the image and its size. Why do we take the focal length as positive? |
| Answer» 2 cm long pin is placed perpendicular to the principal axis of a lens of focal length 15 cm at a distance of 25 centimetres from the lens find the position of the image and its size. Why do we take the focal length as positive? | |
| 25. |
Which of the following are the properties of Visible light? |
|
Answer» Which of the following are the properties of Visible light? |
|
| 26. |
Three resistances each of 4 Ohm are connected in the form of an equilateral triangle. The effective resistance between any two corners is: |
|
Answer» Three resistances each of 4 Ohm are connected in the form of an equilateral triangle. The effective resistance between any two corners is: |
|
| 27. |
(a) For what position of object, the image formed by a concave mirror is magnified and erect ? (b) State whether the image in part (a) is real or virtual ? |
|
Answer» (a) For what position of object, the image formed by a concave mirror is magnified and erect ? (b) State whether the image in part (a) is real or virtual ? |
|
| 28. |
What is information ? As it does not have mass how can it travel |
|
Answer» What is information ? As it does not have mass how can it travel |
|
| 29. |
A uniform magnetic field exists in the plane of the paper pointing from left to right as shown in the figure. In the field, an electron and a proton move as shown. The electron and the proton experience: |
|
Answer» A uniform magnetic field exists in the plane of the paper pointing from left to right as shown in the figure. In the field, an electron and a proton move as shown. The electron and the proton experience:
|
|
| 30. |
State the unit of the magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field. |
|
Answer» State the unit of the magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field. |
|
| 31. |
Why does a coin appear raised when placed in water? |
| Answer» Why does a coin appear raised when placed in water? | |
| 32. |
A ray of light is incident at 60∘, on glass-air interface. Then the light ray will______. Use : [μw = √2 , μa = 1] |
|
Answer» A ray of light is incident at 60∘, on glass-air interface. Then the light ray will______. Use : [μw = √2 , μa = 1] |
|
| 33. |
Complete the following sentences : (a) An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and .......... (b) An object is placed at a distance 2f from a convex of lens of focal length f. The size of image formed is ............ that of the object. (c) An object is placed at a distance 5 cm from a convex of focal length 10 cm. The image formed is virtual, upright and ............ |
|
Answer» Complete the following sentences : (a) An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and .......... (b) An object is placed at a distance 2f from a convex of lens of focal length f. The size of image formed is ............ that of the object. (c) An object is placed at a distance 5 cm from a convex of focal length 10 cm. The image formed is virtual, upright and ............ |
|
| 34. |
The radius of the driving wheel of a set of gears is 18 cm. It has 100 teeth and rotates at a speed of 30 rpm. If the driven wheel rotates at a speed of 150 rpm, the number of teeth in the driven wheel will be: |
|
Answer» The radius of the driving wheel of a set of gears is 18 cm. It has 100 teeth and rotates at a speed of 30 rpm. If the driven wheel rotates at a speed of 150 rpm, the number of teeth in the driven wheel will be: |
|
| 35. |
A glass rod is rubbed with silk and was to found to have 5micro coulomb of charge. How many electrons got transfered and from which material |
|
Answer» A glass rod is rubbed with silk and was to found to have 5micro coulomb of charge. How many electrons got transfered and from which material |
|
| 36. |
Calculate the power loss in an electrical transmission cable, 15 km long, carrying a current of 100A at a potential difference of 200kV. The resistance per km of the cable is 0.2 ohm. |
| Answer» Calculate the power loss in an electrical transmission cable, 15 km long, carrying a current of 100A at a potential difference of 200kV. The resistance per km of the cable is 0.2 ohm. | |
| 37. |
The distance of distinct vision of a person is 50 cm. He wants to read a book placed at 25 CM. What should be the focal length of the spectacles ? |
|
Answer» The distance of distinct vision of a person is 50 cm. He wants to read a book placed at 25 CM. What should be the focal length of the spectacles ? |
|
| 38. |
On what factors does the position of the centre of gravity of a body depend ? |
|
Answer» On what factors does the position of the centre of gravity of a body depend ? |
|
| 39. |
A real image of half the size is obtained in a concave spherical mirror with a radius of curvature of 40cm. The distance of the object and that of its image will be |
|
Answer» A real image of half the size is obtained in a concave spherical mirror with a radius of curvature of 40cm. The distance of the object and that of its image will be |
|
| 40. |
In the figure given below, the ammeter A reads 0.3 A. Calculate the value of R. |
|
Answer» In the figure given below, the ammeter A reads 0.3 A.
Calculate the value of R. |
|
| 41. |
What is the meaning of blitzkrieg? |
|
Answer» What is the meaning of blitzkrieg? |
|
| 42. |
Why Coal is used in thermal Power Plant and Not charcoal...even though is good fuel in comparison to Coal? |
| Answer» Why Coal is used in thermal Power Plant and Not charcoal...even though is good fuel in comparison to Coal? | |
| 43. |
Reason of weightlessness in a satellite is |
|
Answer» Reason of weightlessness in a satellite is |
|
| 44. |
If heavier bodies are attracted more strongly by the earth, why do they not fall faster to the ground? |
|
Answer» If heavier bodies are attracted more strongly by the earth, why do they not fall faster to the ground? |
|
| 45. |
Why a spear fisherman always targets tail of the fish while fishing? |
| Answer» Why a spear fisherman always targets tail of the fish while fishing? | |
| 46. |
How has the traditional use of energy of flowing water been modified for our convenience ? |
| Answer» How has the traditional use of energy of flowing water been modified for our convenience ? | |
| 47. |
When ice melts, its volume______. |
|
Answer» When ice melts, its volume______. |
|
| 48. |
Why does the sun appear flat during sunrise and sunset. Please explain deeply.. |
|
Answer» Why does the sun appear flat during sunrise and sunset. Please explain deeply.. |
|
| 49. |
The lamps in a household circuit are connected in parallel because: (a) this way they required less current (b) If one lamp fails the others remain lit (c) this way they require less power (d) if one lamp fails the others also fail |
|
Answer» The lamps in a household circuit are connected in parallel because: (a) this way they required less current |
|
| 50. |
Do the colours of white light travel at same speed through the air? |
|
Answer» Do the colours of white light travel at same speed through the air? |
|
