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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. |
What is meant by conventional sources of energy? Write the names of two conventional sources of energy. |
| Answer» What is meant by conventional sources of energy? Write the names of two conventional sources of energy. | |
| 2. |
What is the nature of the lens and the position of the object if the image formed is of the same size as that of the object? |
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Answer» What is the nature of the lens and the position of the object if the image formed is of the same size as that of the object? |
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| 3. |
What is the net force? |
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Answer»
What is the net force? |
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| 4. |
The wavelength of an X - Ray is 0.01 A∘, then what will be the frequency? |
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Answer» The wavelength of an X - Ray is 0.01 A∘, then what will be the frequency? |
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| 5. |
The East India Company no longer exists, and it has, thankfully, no exact modern equivalent. Walmart, which is the world’s largest corporation in revenue terms, does not number among its assets a fleet of nuclear submarines; neither Facebook nor Shell possesses regiments of infantry. Yet the East India Company – the first great multinational corporation, and the first to run amok – was the ultimate model for many of today’s joint-stock corporations. The most powerful among them do not need their own armies: they can rely on governments to protect their interests and bail them out. The East India Company remains history’s most terrifying warning about the potential for the abuse of corporate power – and the insidious means by which the interests of shareholders become those of the state. Three hundred and fifteen years after its founding, its story has never been more current. |
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Answer» The East India Company no longer exists, and it has, thankfully, no exact modern equivalent. Walmart, which is the world’s largest corporation in revenue terms, does not number among its assets a fleet of nuclear submarines; neither Facebook nor Shell possesses regiments of infantry. Yet the East India Company – the first great multinational corporation, and the first to run amok – was the ultimate model for many of today’s joint-stock corporations. The most powerful among them do not need their own armies: they can rely on governments to protect their interests and bail them out. The East India Company remains history’s most terrifying warning about the potential for the abuse of corporate power – and the insidious means by which the interests of shareholders become those of the state. Three hundred and fifteen years after its founding, its story has never been more current. |
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| 6. |
The substance coated inside the fluorescent lamp is known as___. |
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Answer» The substance coated inside the fluorescent lamp is known as |
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| 7. |
Keeping the temperature fixed, nitrogen is compressed four times of its initial pressure. The volume of gas in the container changes from 20 cc to V2 cc. Find the final volume V2. |
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Answer» Keeping the temperature fixed, nitrogen is compressed four times of its initial pressure. The volume of gas in the container changes from 20 cc to V2 cc. Find the final volume V2. |
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| 8. |
One coulomb charge is equivalent to the charge contained in: (a) 2.6×1019 electrons (b) 6.2×1019 electrons (c) 2.65×1018 electrons (d) 6.25×1018 electrons |
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Answer» One coulomb charge is equivalent to the charge contained in: |
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| 9. |
In which of the following cases, light bends towards the normal? |
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Answer» In which of the following cases, light bends towards the normal? |
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| 10. |
The curve of angle of incidence versus angle of deviation shown below has been plotted for prism. The value of refractive index of the prism used is |
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Answer» The curve of angle of incidence versus angle of deviation shown below has been plotted for prism.
The value of refractive index of the prism used is |
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| 11. |
Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between |
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Answer» Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between |
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| 12. |
A satellite gets unstable in its orbit, starts to fall towards the earth and also starts burning. If the satellite had a potential energy of 1000 MJ initially and by the time it reaches the surface the earth, it attains a kinetic energy of 500 MJ. Then, how much energy is spent as heat generated on the satellite? |
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Answer» A satellite gets unstable in its orbit, starts to fall towards the earth and also starts burning. If the satellite had a potential energy of 1000 MJ initially and by the time it reaches the surface the earth, it attains a kinetic energy of 500 MJ. Then, how much energy is spent as heat generated on the satellite? |
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| 13. |
Name the part of the retina which is insensitive to light. |
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Answer» Name the part of the retina which is insensitive to light. |
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| 14. |
Rainfall in India is mainly during which period or phenomenon? __ |
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Answer» Rainfall in India is mainly during which period or phenomenon? |
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| 15. |
When two liquids A and B are mixed, the resulting solution is found to be cooler. What do you conclude? |
| Answer» When two liquids A and B are mixed, the resulting solution is found to be cooler. What do you conclude? | |
| 16. |
A pn junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. The current (I) in the resistor R can be shown by |
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Answer» A pn junction (D) shown in the figure can act as a rectifier. An alternating current source (V) is connected in the circuit. |
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| 17. |
Where do most of the refraction of light in human eye occur? |
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Answer» Where do most of the refraction of light in human eye occur? |
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| 18. |
A fish is swimming in a river at a depth of 20 cm from the surface of the water. Refractive Index of water is 43. Then the eagle flying above the water will see the fish at ___ . |
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Answer» A fish is swimming in a river at a depth of 20 cm from the surface of the water. Refractive Index of water is 43. Then the eagle flying above the water will see the fish at |
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| 19. |
Pick out the devices from the following options which convert the sound energy in to the electrical energy. |
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Answer» Pick out the devices from the following options which convert the sound energy in to the electrical energy.
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| 20. |
What is apparent flattening of sun's disc |
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Answer» What is apparent flattening of sun's disc |
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| 21. |
If Pt is used as catalyst in the decomposition of H2O2, then it is an example of |
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Answer» If Pt is used as catalyst in the decomposition of H2O2, then it is an example of |
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| 22. |
What is the principle of an electric bell? |
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Answer» What is the principle of an electric bell? |
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| 23. |
What is the Lorentz force? |
| Answer» What is the Lorentz force? | |
| 24. |
The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is |
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Answer» The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is
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| 25. |
State two ways to produce a higher e.m.f. in an a.c. generator. |
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Answer» State two ways to produce a higher e.m.f. in an a.c. generator. |
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| 26. |
A coil having an area A0 is placed in a magnetic field. The field intensity changes from B0 to 4B0 in time interval of ‘t’. The magnitude of emf induced in the coil will be _____. |
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Answer» A coil having an area A0 is placed in a magnetic field. The field intensity changes from B0 to 4B0 in time interval of ‘t’. The magnitude of emf induced in the coil will be _____. |
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| 27. |
A machine works as a (i) force multiplier, (ii) speed multiplier. In each case state whether the velocity ratio than or less than 1. |
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Answer» A machine works as a (i) force multiplier, (ii) speed multiplier. In each case state whether the velocity ratio than or less than 1. |
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| 28. |
Question 26 With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor? |
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Answer» Question 26 With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor? |
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| 29. |
The resistivity does not change if |
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Answer» The resistivity does not change if |
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| 30. |
A balloon containing 1 mole air at 1 atm initially is filled further with air till pressure increases to 4 atm. The initial diameter of the balloon is 1 m and the pressure at each stage is proportion to diameter of the ballon. How many moles of air have to be added to change the pressure from 1 atm to 4 atm |
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Answer» A balloon containing 1 mole air at 1 atm initially is filled further with air till pressure increases to 4 atm. The initial diameter of the balloon is 1 m and the pressure at each stage is proportion to diameter of the ballon. How many moles of air have to be added to change the pressure from 1 atm to 4 atm |
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| 31. |
The transformer with efficiency 80%works at 4kw and 100V. If the secondary voltage is 200 V then the primary and secondary currents are respectively? |
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Answer» The transformer with efficiency 80%works at 4kw and 100V. If the secondary voltage is 200 V then the primary and secondary currents are respectively? |
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| 32. |
6. a.An object 4 cm in size is placed at a distance of 25 cm from a concave mirror of focal length 15 cm. Find the position, nature and height of the image. b A converging mirror forms a real image of height 4 cm, of an object of height 1 cm placed 20 cm away from the mirror. Calculate the image distance. What is the focal length of the mirror? |
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Answer» 6. a.An object 4 cm in size is placed at a distance of 25 cm from a concave mirror of focal |
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| 33. |
Is it true that,if focal length of a convex lens is positive then the image is formed'v' is also positive? |
| Answer» Is it true that,if focal length of a convex lens is positive then the image is formed'v' is also positive? | |
| 34. |
Differentiate between. (1) electric potential and electric potential energy (2) kilowatt and kilowatt hour . |
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Answer» Differentiate between. (1) electric potential and electric potential energy (2) kilowatt and kilowatt hour . |
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| 35. |
A student has obtained an image of a distant on a screen to determine the focal length F1 of the given lens. His teacher, after checking the image, gave him another lens of focal length F2 and asked him to focus the same object on the same screen. The student found that to obtain a sharp image, he has to move the lens away from the screen. From this finding, we may conclude that both the lenses given to the student were: |
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Answer» A student has obtained an image of a distant on a screen to determine the focal length F1 of the given lens. His teacher, after checking the image, gave him another lens of focal length F2 and asked him to focus the same object on the same screen. The student found that to obtain a sharp image, he has to move the lens away from the screen. From this finding, we may conclude that both the lenses given to the student were: |
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| 36. |
An isotope of the element lead (Pb) undergoes a nuclear reaction that results in the release of a β-particle, an anti-neutrino, and an element X. Find X. |
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Answer» An isotope of the element lead (Pb) undergoes a nuclear reaction that results in the release of a β-particle, an anti-neutrino, and an element X. Find X.
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| 37. |
Sunlight is incident on a concave mirror parallel to its principal axis. The image of the sun is formed 15 cm from the pole. Calculate the radius of curvature of the mirror. |
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Answer» Sunlight is incident on a concave mirror parallel to its principal axis. The image of the sun is formed 15 cm from the pole. Calculate the radius of curvature of the mirror. |
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| 38. |
An object is placed in front of a convex mirror at 60 m from the mirror. Its radius of curvature is 40 m. The object starts moving towards the mirror at 20 m/s. Then the average speed of the image after a time interval of 2 sec is ___ m/s. |
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Answer» An object is placed in front of a convex mirror at 60 m from the mirror. Its radius of curvature is 40 m. The object starts moving towards the mirror at 20 m/s. Then the average speed of the image after a time interval of 2 sec is |
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| 39. |
Define one ampere of current. |
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Answer» Define one ampere of current. |
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| 40. |
The combined resistance of 6Ω and 12Ω connected in parallel is |
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Answer» The combined resistance of 6Ω and 12Ω connected in parallel is |
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| 41. |
The compass is circled around a bar magnet. State at which point around the bar magnet, the compass will show the maximum deflection. |
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Answer» The compass is circled around a bar magnet. State at which point around the bar magnet, the compass will show the maximum deflection. |
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| 42. |
In Fig. 4.18, a ray of light A incident from air suffers partial reflection and refraction at the boundary of water. (a) Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C. (b) How are the angles of incidence i and refraction r related? |
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Answer» In Fig. 4.18, a ray of light A incident from air suffers partial reflection and refraction at the boundary of water. (a) Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C. (b) How are the angles of incidence i and refraction r related?
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| 43. |
A convex lens of focal length 15 cm is kept in front of a concave lens of focal length 30 cm. What is the power of the two lens system? |
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Answer» A convex lens of focal length 15 cm is kept in front of a concave lens of focal length 30 cm. What is the power of the two lens system? |
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| 44. |
A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure. The image of the source ‘O’ appears to be |
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Answer» A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure.
The image of the source ‘O’ appears to be |
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| 45. |
Which bulb will glow when switch is turned on |
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Answer» Which bulb will glow when switch is turned on |
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| 46. |
If white ray falls on the system in the given way then how many colours will we see after all dispersion has happened? |
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Answer» If white ray falls on the system in the given way then how many colours will we see after all dispersion has happened?
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| 47. |
A substance has zero resistance below 1K. What is such a substance called? |
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Answer» A substance has zero resistance below 1K. What is such a substance called? |
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| 48. |
If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a ray diagram to justify your answer. Where and why do we generally use this type of mirror? |
| Answer» If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a ray diagram to justify your answer. Where and why do we generally use this type of mirror? | |
| 49. |
What is the magnitude of force needed to produce an acceleration of 4 m/s2 in a ball of 6 kg? |
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Answer» What is the magnitude of force needed to produce an acceleration of 4 m/s2 in a ball of 6 kg? |
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| 50. |
A convex lens forms an inverted image of size same as that of the object which is placed at a distance 60 cm in front of the lens. Find : (a) the position of image, and (b) the focal length of the lens |
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Answer» A convex lens forms an inverted image of size same as that of the object which is placed at a distance 60 cm in front of the lens. Find : (a) the position of image, and (b) the focal length of the lens |
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