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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. |
Which of the following shows Tyndall effect? |
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Answer» Which of the following shows Tyndall effect? |
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| 2. |
Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of |
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Answer» Harry is standing in front of a plane mirror at a distance of 6 m. His image on the other side will form at a distance of |
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| 3. |
A U tube of uniform bore of cross-sectional area A has been set up vertically with open ends facing up. Now m gm of a liquid of density d is poured into it. The column of liquid in this tube will oscillate with a period T such that |
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Answer» A U tube of uniform bore of cross-sectional area A has been set up vertically with open ends facing up. Now m gm of a liquid of density d is poured into it. The column of liquid in this tube will oscillate with a period T such that |
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| 4. |
A ray of green light enters a liquid from air, as shown in Fig. 4.21. The angle 1 is 45∘ and angle 2 is 30∘. (a) Find the refractive index of the liquid. (b) Show in the diagram the path of the ray after it strikes the mirror and re-enters in the air. Mark in the diagram the angles wherever necessary. (c) Redraw the diagram if the plane mirror becomes normal to the refracted ray inside the liquid. State the principle used. |
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Answer»
A ray of green light enters a liquid from air, as shown in Fig. 4.21. The angle 1 is 45∘ and angle 2 is 30∘. (a) Find the refractive index of the liquid. (b) Show in the diagram the path of the ray after it strikes the mirror and re-enters in the air. Mark in the diagram the angles wherever necessary. (c) Redraw the diagram if the plane mirror becomes normal to the refracted ray inside the liquid. State the principle used. |
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| 5. |
I've known Vinayak _______ December 2013. |
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Answer» I've known Vinayak _______ December 2013. |
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| 6. |
What is the equivalent resistance between A and B in the circuit of figure if R=3 Ω. |
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Answer» What is the equivalent resistance between A and B in the circuit of figure if R=3 Ω. |
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| 7. |
The phenomenon by which colloidal particles scatter light is called ___ . |
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Answer» The phenomenon by which colloidal particles scatter light is called |
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| 8. |
What are first and second order rainbows? |
| Answer» What are first and second order rainbows? | |
| 9. |
A concave lens of focal length f forms an image whose height is n times the height of the object. The distance of the object from the lens is: |
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Answer» A concave lens of focal length f forms an image whose height is n times the height of the object. The distance of the object from the lens is: |
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| 10. |
How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, will be able to lift at a constant speed of 1m/s vertically? |
| Answer» How is the power related to the speed at which a body can be lifted? How many kilograms will a man working at the power of 100 W, will be able to lift at a constant speed of 1m/s vertically? | |
| 11. |
Find the position of the object that should be placed in front of a convex lens so that the image formed is inverted and enlarged. |
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Answer» Find the position of the object that should be placed in front of a convex lens so that the image formed is inverted and enlarged. |
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| 12. |
(a) Explain why, it is more dangerous to touch the live wire of a mains supply rather than the neutral wire. (b) Why is it safe for birds to sit on naked power lines fixed atop tall electric poles ? |
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Answer» (a) Explain why, it is more dangerous to touch the live wire of a mains supply rather than the neutral wire. (b) Why is it safe for birds to sit on naked power lines fixed atop tall electric poles ? |
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| 13. |
Calculate the effort arm (in cm) of a lever in which the mechanical advantage is 4 and the load arm is 90 cm.360 |
Answer» Calculate the effort arm (in cm) of a lever in which the mechanical advantage is 4 and the load arm is 90 cm.
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| 14. |
What is the far point for a normal eye? |
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Answer» What is the far point for a normal eye? |
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| 15. |
Option 25 Why does a magnetic compass needle pointing north and south in the absence of a nearby magnet gets deflected when a bar magnet or a current carrying loop is brought near to it. Describe some salient features of magnetic lines of field concept. |
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Answer» Option 25 |
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| 16. |
A balloon contains 1 L of air at a particular temperature and 75 cm Hg pressure. Keeping the temperature constant if the pressure of air is reduced to 50 cm Hg, then what will be the volume of that air? |
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Answer» A balloon contains 1 L of air at a particular temperature and 75 cm Hg pressure. Keeping the temperature constant if the pressure of air is reduced to 50 cm Hg, then what will be the volume of that air? |
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| 17. |
Which is the ultimate source for generating electricity? |
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Answer» Which is the ultimate source for generating electricity? |
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| 18. |
A medium through which light propagates easily is a |
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Answer» A medium through which light propagates easily is a |
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| 19. |
The absolute refractive index of a medium with respect to air is given by : [c = speed of light in air, v = speed of light in the medium] |
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Answer» The absolute refractive index of a medium with respect to air is given by : [c = speed of light in air, v = speed of light in the medium] |
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| 20. |
Question 18 (a) A person needs a lens of power –4.5 D for correction of her vision. What kind of defect in vision is she suffering from? |
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Answer» Question 18 (a) A person needs a lens of power –4.5 D for correction of her vision. What kind of defect in vision is she suffering from? |
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| 21. |
What will happen if in a HOT CATHODE RAY TUBE the i) voltage or potential difference of the Low Tension battery is increased ii) voltage or potential difference of the High Tension battery is increased? |
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Answer» What will happen if in a HOT CATHODE RAY TUBE the i) voltage or potential difference of the Low Tension battery is increased ii) voltage or potential difference of the High Tension battery is increased? |
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| 22. |
When the current in a conductor is doubled keeping other parameters constant, the heat energy produced will be _____ the initial value: |
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Answer» When the current in a conductor is doubled keeping other parameters constant, the heat energy produced will be _____ the initial value: |
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| 23. |
What is the meaning of geographical isolation and Binocular vision? |
| Answer» What is the meaning of geographical isolation and Binocular vision? | |
| 24. |
What is benjamin franklin's experiment? |
| Answer» What is benjamin franklin's experiment? | |
| 25. |
After holding a pack of ice in your hand for some time, put your hand in water at a normal temperature. Your hand would now feel: |
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Answer» After holding a pack of ice in your hand for some time, put your hand in water at a normal temperature. Your hand would now feel: |
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| 26. |
Look at the figure given below and answer the question based on it. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells that: |
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Answer» Look at the figure given below and answer the question based on it. Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings
The deflection of the compass needle decreases as the compass is moved away from the copper wire. This tells that: |
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| 27. |
What should come in the sequence next? |
Answer» What should come in the sequence next? |
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| 28. |
A radioactive element decays as follows: aPb - 2α → cQd → eRf + -1e0 The relation between a, b, e, & f is |
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Answer» A radioactive element decays as follows: aPb - 2α → cQd → eRf + -1e0 The relation between a, b, e, & f is |
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| 29. |
If a bulb of 60 watt is connected across 220 volt . Find the current drawn by it. |
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Answer» If a bulb of 60 watt is connected across 220 volt . Find the current drawn by it. |
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| 30. |
Which of the following is a parameter to be ensured when setting up the gas thermometer? |
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Answer» Which of the following is a parameter to be ensured when setting up the gas thermometer? |
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| 31. |
What are the disadvantages of wave energy? |
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Answer» What are the disadvantages of wave energy? |
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| 32. |
When a force is applied in a direction passing through the pivoted point of the body, will the body rotate? Give reason to support your answer. |
| Answer» When a force is applied in a direction passing through the pivoted point of the body, will the body rotate? Give reason to support your answer. | |
| 33. |
Identify the correct position of the image of the Sun formed by the concave mirror. |
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Answer» Identify the correct position of the image of the Sun formed by the concave mirror. |
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| 34. |
Find the frequency of a sound wave travelling in air with a wavelength of 0.85 m. The velocity of sound in air is 340 m s−1 |
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Answer» Find the frequency of a sound wave travelling in air with a wavelength of 0.85 m. |
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| 35. |
A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. What p.d. is needed to make a current of 250 mA flow through the same wire? |
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Answer» A p.d. of 10 V is needed to make a current of 0.02 A flow through a wire. What p.d. is needed to make a current of 250 mA flow through the same wire? |
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| 36. |
A fuse is always connected in the live wire of the circuit. Explain the reason. |
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Answer» A fuse is always connected in the live wire of the circuit. Explain the reason. |
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| 37. |
Which coloured light scatters the most because of its small wavelength? |
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Answer» Which coloured light scatters the most because of its small wavelength? |
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| 38. |
Is electricity positively charged or negatively charged? |
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Answer» Is electricity positively charged or negatively charged? |
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| 39. |
(a) Name a device that helps to measure the potential difference across a conductor. (b) how much energy is transferred by a 12 V power supply to each coulomb of charge which it moves around a circuit? |
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Answer» (a) Name a device that helps to measure the potential difference across a conductor. |
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| 40. |
A current 0. 2 A flows in a wire of resistance 15 Ω. Find the potential difference across the ends of the wire. |
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Answer» A current 0. 2 A flows in a wire of resistance 15 Ω. Find the potential difference across the ends of the wire. |
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| 41. |
Why refrigerator is always painted white from inside??? |
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Answer» Why refrigerator is always painted white from inside??? |
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| 42. |
Choose the correct relation between I, q and t (I - current, q - charge, t - time). |
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Answer» Choose the correct relation between I, q and t (I - current, q - charge, t - time). |
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| 43. |
The color of livewire is: |
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Answer» The color of livewire is: |
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| 44. |
Which of these cannot be explained best by Newton's third law of motion? |
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Answer» Which of these cannot be explained best by Newton's third law of motion? |
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| 45. |
A person stands in front of a mirror his head appears to be diminished and his body appears in normal size but his legs appears to be enlarged. Wt might be the reason behind this? Wt ar the mirrors used? |
| Answer» A person stands in front of a mirror his head appears to be diminished and his body appears in normal size but his legs appears to be enlarged. Wt might be the reason behind this? Wt ar the mirrors used? | |
| 46. |
The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ___. |
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Answer» The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as |
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| 47. |
Consider the following about Advanced Heavy Water Reactor (AHWR) technology: Which of the statements is/are correct? |
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Answer» Consider the following about Advanced Heavy Water Reactor (AHWR) technology: Which of the statements is/are correct? |
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| 48. |
It is already known that the sky would have been black and the stars would have shown all day is there was no environment. But If there was not atmosphere on Earth, would the objects around us still be visible? Why/why not? |
| Answer» It is already known that the sky would have been black and the stars would have shown all day is there was no environment. But If there was not atmosphere on Earth, would the objects around us still be visible? Why/why not? | |
| 49. |
Find the y-coordinate of com of a uniform plate having semi-circular inner and outer boundaries of radii R1 and R2 with respect to 0 (as shown below) |
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Answer» Find the y-coordinate of com of a uniform plate having semi-circular inner and outer boundaries of radii R1 and R2 with respect to 0 (as shown below)
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| 50. |
A truck weighing 50 kg changes its speed from 10 ms−1 to 40 ms−1 in 2 minutes. Find the power of its engine. |
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Answer» A truck weighing 50 kg changes its speed from 10 ms−1 to 40 ms−1 in 2 minutes. Find the power of its engine. |
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