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. |
Consider the following statements and choose the correct option. 1. Magnetic field lines around a magnet cannot intersect. 2. When magnetic field lines intersect, the compass at the point of intersection flutuates between the two directions. Choose the correct option. |
|
Answer» Consider the following statements and choose the correct option. |
|
| 2. |
A unit positive charge has to be brought from infinity to a mid-point between two charges, 20 μC and 10 μC separated by a distance of 50 m. How much work will be required by an external force? |
|
Answer» A unit positive charge has to be brought from infinity to a mid-point between two charges, 20 μC and 10 μC separated by a distance of 50 m. How much work will be required by an external force? |
|
| 3. |
A block of mass 200 kg is accelerated uniformly from a velocity of 6 ms−1 to 8 ms−1 in 5 s. Calculate the initial momentum, final momentum and the magnitude of the force inserted on the block. |
|
Answer» A block of mass 200 kg is accelerated uniformly from a velocity of 6 ms−1 to 8 ms−1 in 5 s. Calculate the initial momentum, final momentum and the magnitude of the force inserted on the block. |
|
| 4. |
In which of these circuits will the lamp glow when switch is on? Explain the reason in each case. |
Answer» In which of these circuits will the lamp glow when switch is on? Explain the reason in each case.
|
|
| 5. |
The minimum number of cells in mixed grouping required the produce a maximum currents of 1.5 A through an external resistance of 30 Ω given the emf of each cell is 1.5 V and internal resistance is 1 Ω is |
|
Answer» The minimum number of cells in mixed grouping required the produce a maximum currents of 1.5 A through an external resistance of 30 Ω given the emf of each cell is 1.5 V and internal resistance is 1 Ω is |
|
| 6. |
Some amount of common salt is dissolved in a beaker full of water. How does this affect the boiling point of water? |
|
Answer» Some amount of common salt is dissolved in a beaker full of water. How does this affect the boiling point of water? |
|
| 7. |
What is roentogen |
|
Answer» What is roentogen |
|
| 8. |
What is resilence? |
| Answer» What is resilence? | |
| 9. |
What types of waves can not be produced in liquids and gases? |
|
Answer» What types of waves can not be produced in liquids and gases? |
|
| 10. |
A positive charge q is placed in front of a conducting solid cube at adistance d from is centre . Find the E field at the centre of the cube due to charges appearing on its surface |
| Answer» A positive charge q is placed in front of a conducting solid cube at adistance d from is centre . Find the E field at the centre of the cube due to charges appearing on its surface | |
| 11. |
A convex lens forms a real image of point object at a dis†an ve of 50cm from the convex lens.A concabe lens is places 10cm behind the convex lens on the image side. On placing a plane mirror on the image side and facing the concave lens, it is observed that the final image now coincides with the object itself. the focal lenght of the concave lens is? |
| Answer» A convex lens forms a real image of point object at a dis†an ve of 50cm from the convex lens.A concabe lens is places 10cm behind the convex lens on the image side. On placing a plane mirror on the image side and facing the concave lens, it is observed that the final image now coincides with the object itself. the focal lenght of the concave lens is? | |
| 12. |
1 g ice at 0o C melts to form 1 g water at 0o C. State whether the latent heat is absorbed or given out by ice. |
|
Answer» 1 g ice at 0o C melts to form 1 g water at 0o C. State whether the latent heat is absorbed or given out by ice. |
|
| 13. |
two resistors X and y first connected in parallel and any series it produces by parallel combination is equal to heat produced by 2 ohm resistor the equivalent resistance of series combination is 9 ohm then resistance of x and y are (if ,X>Y) |
| Answer» two resistors X and y first connected in parallel and any series it produces by parallel combination is equal to heat produced by 2 ohm resistor the equivalent resistance of series combination is 9 ohm then resistance of x and y are (if ,X>Y) | |
| 14. |
The minimum distance between an object and a real image in a convex lens is in terms of focal length f is |
| Answer» The minimum distance between an object and a real image in a convex lens is in terms of focal length f is | |
| 15. |
The frequency of a vibrating body is 25 Hz. Calculate its time period (in sec).0.04 |
Answer» The frequency of a vibrating body is 25 Hz. Calculate its time period (in sec).
|
|
| 16. |
Calculate the refractive index of glass with respect to air if its critical angle is 37. |
| Answer» Calculate the refractive index of glass with respect to air if its critical angle is 37. | |
| 17. |
Two thin lenses of focal lengths f1 and f2 are placed in contact with each other. The focal length of the combination will be given by: |
|
Answer» Two thin lenses of focal lengths f1 and f2 are placed in contact with each other. The focal length of the combination will be given by: |
|
| 18. |
A long solenoid of radius 2 cm has 100 turns/cmand carries a current of 5A. A coil of radius 1 cmhaving 100 turns and a total resistance of 20 Ω is placed inside the solenoid co-axially. Thecoil is connected to galvanometer. If current inthe solenoid is reversed in direction. Find thecharge flown through the galvanometer. |
| Answer» A long solenoid of radius 2 cm has 100 turns/cmand carries a current of 5A. A coil of radius 1 cmhaving 100 turns and a total resistance of 20 Ω is placed inside the solenoid co-axially. Thecoil is connected to galvanometer. If current inthe solenoid is reversed in direction. Find thecharge flown through the galvanometer. | |
| 19. |
Current I is moving in a hexagon shaped loop of side length a.Find the expression for magnetic field at centre |
| Answer» Current I is moving in a hexagon shaped loop of side length a.Find the expression for magnetic field at centre | |
| 20. |
Identify the point of application of force in order to open the door effectively. |
|
Answer» Identify the point of application of force in order to open the door effectively. |
|
| 21. |
A ray of light travelling in air is incident on the plane of a transparent medium. The angle of incidence is 45∘ and that of refraction is 30∘. Find the refractive index of the medium. |
|
Answer» A ray of light travelling in air is incident on the plane of a transparent medium. The angle of incidence is 45∘ and that of refraction is 30∘. Find the refractive index of the medium.
|
|
| 22. |
pipe has length 'l' .the air in it is vibrating in third overtone with maximum amplitude 'a'. find the amplitude at a distance of l/7 from closed end of the pipe. |
| Answer» pipe has length 'l' .the air in it is vibrating in third overtone with maximum amplitude 'a'. find the amplitude at a distance of l/7 from closed end of the pipe. | |
| 23. |
Explain the process of image formation in eye |
| Answer» Explain the process of image formation in eye | |
| 24. |
What is the difference between absolute refractive index and relative refractive index |
|
Answer» What is the difference between absolute refractive index and relative refractive index |
|
| 25. |
Explain the three ways in which energy can be harnessed from the sea. |
|
Answer» Explain the three ways in which energy can be harnessed from the sea. |
|
| 26. |
Refractive index of diamond is 2.41How does this indicate that light travels 2.41 times faster in vacuum or air than in diamond? |
|
Answer» Refractive index of diamond is 2.41 How does this indicate that light travels 2.41 times faster in vacuum or air than in diamond? |
|
| 27. |
Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc D1 has 2 kg mass and 0.2 m radius and initial angular velocity of 50 rad s1. Disc D2 has 4kg mass, 0.1 m radius and initial angular velocity of 200 rad s1. The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in rad.s1) of the system is |
| Answer» Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc D1 has 2 kg mass and 0.2 m radius and initial angular velocity of 50 rad s1. Disc D2 has 4kg mass, 0.1 m radius and initial angular velocity of 200 rad s1. The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in rad.s1) of the system is | |
| 28. |
If angle of incidence is increased what happens to angle of refraction? |
| Answer» If angle of incidence is increased what happens to angle of refraction? | |
| 29. |
The number of turns in primary and secondary windings of a transformer are 1000 and 100 respectively. If 200 V DC voltage is applied across the primary terminal, then the voltage across the secondary terminal is |
|
Answer» The number of turns in primary and secondary windings of a transformer are 1000 and 100 respectively. If 200 V DC voltage is applied across the primary terminal, then the voltage across the secondary terminal is |
|
| 30. |
10.Photons of wave length 'X' are incident on a metal. The most energetic electrons ejected from the metal bent into a circular arc of R by a perpendicular magnetic field having magnitude B. What is the work function of metal? |
| Answer» 10.Photons of wave length 'X' are incident on a metal. The most energetic electrons ejected from the metal bent into a circular arc of R by a perpendicular magnetic field having magnitude B. What is the work function of metal? | |
| 31. |
An electromagnetic wave of intensity 50 Wm2 enters a transparent medium of refractive index n without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of magnetic fields of the wave before and after entering into the medium are respectively, given by: |
|
Answer» An electromagnetic wave of intensity 50 Wm2 enters a transparent medium of refractive index n without any loss. The ratio of the magnitudes of electric fields, and the ratio of the magnitudes of magnetic fields of the wave before and after entering into the medium are respectively, given by: |
|
| 32. |
what is intensity of a image? |
| Answer» what is intensity of a image? | |
| 33. |
The glasses used for reading purposes are essentially ______lenses, while those used for seeing distant objects clearly are essentially ______ lenses. |
|
Answer» The glasses used for reading purposes are essentially ______lenses, while those used for seeing distant objects clearly are essentially ______ lenses. |
|
| 34. |
Find the angle of refraction in the following figure? |
|
Answer» Find the angle of refraction in the following figure?
|
|
| 35. |
Suresh stands in front of a shiny uneven surface, but he is not able to see his image on the surface. Why does this happen? |
|
Answer» Suresh stands in front of a shiny uneven surface, but he is not able to see his image on the surface. Why does this happen? |
|
| 36. |
What is the difference between electric force and chemical force ? |
|
Answer» What is the difference between electric force and chemical force ? |
|
| 37. |
A ray of light travelling in air enters obliquely into water. Does the ray of light bend towards the normal or away from the normal? Why? |
|
Answer» A ray of light travelling in air enters obliquely into water. Does the ray of light bend towards the normal or away from the normal? Why? |
|
| 38. |
What is the amplitude of a wave? |
|
Answer» What is the amplitude of a wave? |
|
| 39. |
Explain in brief the working of a television. |
| Answer» Explain in brief the working of a television. | |
| 40. |
Why zn2+size greater than cu2+ ? |
| Answer» Why zn2+size greater than cu2+ ? | |
| 41. |
When did India sign a treaty for banning of atomic tests? |
|
Answer» When did India sign a treaty for banning of atomic tests? |
|
| 42. |
Three identical bulbs are connected in parallel with a battery.The current drawn from the battery is 6 A. If one of the bulbs gets fused, what will be the total current drawn from the battery ? |
|
Answer» Three identical bulbs are connected in parallel with a battery.The current drawn from the battery is 6 A. If one of the bulbs gets fused, what will be the total current drawn from the battery ? |
|
| 43. |
The refractive index of diamond is 2.42. What is the meaning of this statement in relation to the speed of light ? |
|
Answer» The refractive index of diamond is 2.42. What is the meaning of this statement in relation to the speed of light ? |
|
| 44. |
Which of these will travel in glass with minimum velocity? (1)Violet light (2)Green light (3)Yellow light (4)Red ligh |
| Answer» Which of these will travel in glass with minimum velocity? (1)Violet light (2)Green light (3)Yellow light (4)Red ligh | |
| 45. |
43. Will the work done by centripetal force be 0 if an object is spiralling inward?? (Displacement is in the direction of force) |
| Answer» 43. Will the work done by centripetal force be 0 if an object is spiralling inward?? (Displacement is in the direction of force) | |
| 46. |
The power generated in a windmill: |
|
Answer» The power generated in a windmill: |
|
| 47. |
What are the advantages of having two eyes instead of just one ? |
|
Answer» What are the advantages of having two eyes instead of just one ? |
|
| 48. |
what is hydro power plants? working of hydro power plant |
| Answer» what is hydro power plants? working of hydro power plant | |
| 49. |
Which of the following is a good insulator of heat? |
|
Answer» Which of the following is a good insulator of heat? |
|
| 50. |
On which atom will the negative sign be in ICl4- ion? |
| Answer» On which atom will the negative sign be in ICl4- ion? | |
