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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. |
We know that SI unit of electric power is watt. Which unit among the following represents electric power? |
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Answer» We know that SI unit of electric power is watt. Which unit among the following represents electric power? |
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| 2. |
Which of the following is not a telecommunication device? |
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Answer» Which of the following is not a telecommunication device? |
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| 3. |
State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vaccum. OR What is meant by power of a lens ? Write its SI unit. A student uses a lens of focal length 40 cm and another of -20 cm. Write the power of each lens. |
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Answer» State the laws of refraction of light. Explain the term 'absolute refractive index of a medium' and write an expression to relate it with the speed of light in vaccum. OR What is meant by power of a lens ? Write its SI unit. A student uses a lens of focal length 40 cm and another of -20 cm. Write the power of each lens. |
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| 4. |
Draw a well labelled diagram of a solar cooker. Identify two components in its structure that helps in maximizing heat absorption in it. |
| Answer» Draw a well labelled diagram of a solar cooker. Identify two components in its structure that helps in maximizing heat absorption in it. | |
| 5. |
A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R; h<<R). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to (Neglect the effect of atmosphere.) |
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Answer» A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R; h<<R). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to (Neglect the effect of atmosphere.) |
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| 6. |
A ray is incident on a plane mirror. Its reflected ray is perpendicular to the incident ray. Find the angle of incidence. |
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Answer» A ray is incident on a plane mirror. Its reflected ray is perpendicular to the incident ray. Find the angle of incidence. |
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| 7. |
A charge of 2C moves between two plates maintained at potential difference of 10V . What is the energy acquired by the charge ? |
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Answer» A charge of 2C moves between two plates maintained at potential difference of 10V . What is the energy acquired by the charge ? |
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| 8. |
According to the Bohr's theory, |
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Answer» According to the Bohr's theory, |
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| 9. |
What is the far and near point of human eye with normal vision. |
| Answer» What is the far and near point of human eye with normal vision. | |
| 10. |
which of the folloing property of a proton can change while it moves freely in a magnetic field ? will kineic energy also change because velocity changes so kinetic energy should also change |
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Answer» which of the folloing property of a proton can change while it moves freely in a magnetic field ? will kineic energy also change because velocity changes so kinetic energy should also change |
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| 11. |
Can the laws for plane refracting surfaces be applied to spherical refracting surfaces too? State the laws of refraction of light. |
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Answer» Can the laws for plane refracting surfaces be applied to spherical refracting surfaces too? State the laws of refraction of light. |
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| 12. |
At what temperature (in ∘C) will the velocity of sound in air be triple its velocity at 0 ∘C? (The velocity of sound in air at 0 ∘C=330 m s−1)2184 |
Answer» At what temperature (in ∘C) will the velocity of sound in air be triple its velocity at 0 ∘C? (The velocity of sound in air at 0 ∘C=330 m s−1)
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| 13. |
I m in doubt that. Why current always flow as just opposite of electron in a circuit?PLZZ answer |
| Answer» I m in doubt that. Why current always flow as just opposite of electron in a circuit?PLZZ answer | |
| 14. |
When a charged particle in motion enters in a uniform magnetic field perpendicularly then its |
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Answer» When a charged particle in motion enters in a uniform magnetic field perpendicularly then its |
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| 15. |
What does this statement "The line spectrum of atomic hydrogen suggests that the atom has discrete energy levels” mean? |
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Answer» What does this statement "The line spectrum of atomic hydrogen suggests that the atom has discrete energy levels” mean? |
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| 16. |
A ray of light travelling in water emerges into air. Draw a ray-diagram indicating the change in its path. |
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Answer» A ray of light travelling in water emerges into air. Draw a ray-diagram indicating the change in its path. |
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| 17. |
How does the resistance of: i) a semiconductor, and ii) an alloy vary with temperature? |
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Answer» How does the resistance of: i) a semiconductor, and ii) an alloy vary with temperature? |
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| 18. |
A virtual, erect, and magnified image of an object is to be produced with a concave mirror of a focal length of 12 cm. Which of the following object distance should be chosen for this purpose? (i) 10 cm (ii) 15 cm (iii) 20 cm Give reasons for your choice. |
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Answer» A virtual, erect, and magnified image of an object is to be produced with a concave mirror of a focal length of 12 cm. Which of the following object distance should be chosen for this purpose? (i) 10 cm (ii) 15 cm (iii) 20 cm Give reasons for your choice. |
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| 19. |
The axis of rotation of a purely rotating body |
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Answer» The axis of rotation of a purely rotating body |
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| 20. |
Sine of angle of incidence ÷ sine of emergence = constant What do you mean by this constant |
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Answer» Sine of angle of incidence ÷ sine of emergence = constant What do you mean by this constant |
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| 21. |
The above diagram shows the arrangement for observing scattering of light in colloidal solution, why does the beaker appear blue? |
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Answer»
The above diagram shows the arrangement for observing scattering of light in colloidal solution, why does the beaker appear blue? |
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| 22. |
On which of the following factor/s does the turns ratio of transformers depend? |
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Answer» On which of the following factor/s does the turns ratio of transformers depend? |
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| 23. |
Functions of crystalline lens in eyes???? |
| Answer» Functions of crystalline lens in eyes???? | |
| 24. |
Name three properties of ultraviolet radiations which are similar to the visible light. |
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Answer» Name three properties of ultraviolet radiations which are similar to the visible light. |
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| 25. |
Imagine if the current in the primary coil of a transformer becomes steady, then what happens to magnetic field? |
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Answer» Imagine if the current in the primary coil of a transformer becomes steady, then what happens to magnetic field? |
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| 26. |
Write down an expression for the resistance of a metallic wire in terms of the resistivity ? |
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Answer» Write down an expression for the resistance of a metallic wire in terms of the resistivity ? |
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| 27. |
Mention 3 enzymes involved in human digestion and also mention their function |
| Answer» Mention 3 enzymes involved in human digestion and also mention their function | |
| 28. |
What is the difference between work and energy |
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Answer» What is the difference between work and energy |
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| 29. |
Fill in the blank with the correct collocation. I wish you the very best for your performance. ________ a leg! |
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Answer» Fill in the blank with the correct collocation. I wish you the very best for your performance. ________ a leg! |
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| 30. |
An engine can pump 30,000 litres of water to a vertical height of 45 metres in 10 minutes. Calculate the work done by the machine. Take g= 9.8 m s-1 [Density of water = 103 kg m-3 1000 liters = 1 m3] |
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Answer» An engine can pump 30,000 litres of water to a vertical height of 45 metres in 10 minutes. Calculate the work done by the machine. Take g= 9.8 m s-1 [Density of water = 103 kg m-3 1000 liters = 1 m3] |
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| 31. |
A thin girl & a fat man have same KE. Which of the 2 have a greater momentum? If the ratio of their masses is 4:25, calculate the ratio of their momentum. |
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Answer» A thin girl & a fat man have same KE. Which of the 2 have a greater momentum? If the ratio of their masses is 4:25, calculate the ratio of their momentum. |
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| 32. |
The colour of white light which is deviated the maximum on passing through the glass prism is : (a) blue (b) indigo (c) red (d) orange |
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Answer» The colour of white light which is deviated the maximum on passing through the glass prism is : (a) blue (b) indigo (c) red (d) orange |
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| 33. |
Question 10 The strength of magnetic field inside a long current carrying straight solenoid is (a) more at the ends than at the centre (b) minimum in the middle (c) same at all points (d) found to increase from one end to the other |
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Answer» Question 10 The strength of magnetic field inside a long current carrying straight solenoid is (a) more at the ends than at the centre (b) minimum in the middle (c) same at all points (d) found to increase from one end to the other |
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| 34. |
What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why? |
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Answer» What are the two ways in which cow-dung can be used as a fuel? Which of them is better and why? |
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| 35. |
What causes the potential difference between the two terminals of a cell? |
| Answer» What causes the potential difference between the two terminals of a cell? | |
| 36. |
A certain person has minimum distance of distinct vision of 150cm. He wishes to read at a distance of 25cm. What focal length glass should he use? What is the nature of eye defect? [3 MARKS] |
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Answer» A certain person has minimum distance of distinct vision of 150cm. He wishes to read at a distance of 25cm. What focal length glass should he use? What is the nature of eye defect? [3 MARKS] |
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| 37. |
We have an electric kettle rated at (60V, 5A). What is the electrical energy dissipated by the kettle in 5 minutes of continuous operation? |
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Answer» We have an electric kettle rated at (60V, 5A). What is the electrical energy dissipated by the kettle in 5 minutes of continuous operation? |
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| 38. |
What is the other name of Maxwell's right-hand thumb rule ? |
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Answer» What is the other name of Maxwell's right-hand thumb rule ? |
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| 39. |
The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity? |
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Answer» The atoms of copper contain electrons and the atoms of rubber also contain electrons. Then why does copper conduct electricity but rubber does not conduct electricity? |
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| 40. |
Two cars A and B with a mass of 5 kg and 10 kg and initial velocities of 10 ms−1 and 5 ms−1 are racing. Which car exerts more power before coming to rest? (Time taken for both cars to complete the race is 10 seconds): |
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Answer» Two cars A and B with a mass of 5 kg and 10 kg and initial velocities of 10 ms−1 and 5 ms−1 are racing. Which car exerts more power before coming to rest? (Time taken for both cars to complete the race is 10 seconds): |
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| 41. |
Which mirror has a wider field of view ? |
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Answer» Which mirror has a wider field of view ? |
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| 42. |
The correct lens formula is: |
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Answer» The correct lens formula is: |
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| 43. |
When water particles condenses on air on dust, it forms :- |
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Answer» When water particles condenses on air on dust, it forms :- |
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| 44. |
A pair of tongs has 20 cm long arms that can lift a piece of coal of weight 1.5 kgf, by applying an effort at distance 15 cm from the fulcrum. Calculate the mechanical advantage. 0.75 |
Answer» A pair of tongs has 20 cm long arms that can lift a piece of coal of weight 1.5 kgf, by applying an effort at distance 15 cm from the fulcrum. Calculate the mechanical advantage.
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| 45. |
A converging lens of focal length 20 cm forms an image, when an object is placed 15 cm away from it. Calculate how far (in cm) the image is, from the lens. Include the sign.-60 |
Answer» A converging lens of focal length 20 cm forms an image, when an object is placed 15 cm away from it. Calculate how far (in cm) the image is, from the lens. Include the sign.
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| 46. |
Does steam is as much powerful to rotate the turbine for the genration of electricity? |
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Answer» Does steam is as much powerful to rotate the turbine for the genration of electricity? |
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| 47. |
A potential difference of 12 V is applied across a resistor of 6 Ω. What is the current(in ampere) flowing in the circuit?2 |
Answer» A potential difference of 12 V is applied across a resistor of 6 Ω. What is the current(in ampere) flowing in the circuit?
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| 48. |
When a magnet is kept on a table and a compass is taken close to it, it points in a certain direction at every point near the magnet. When the points are joined, we obtain certain lines. Choose the correct statement(s) regarding the lines 1. The closer they are, the stronger the magnet. 2. They are imaginary lines which have a particular direction. |
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Answer» When a magnet is kept on a table and a compass is taken close to it, it points in a certain direction at every point near the magnet. When the points are joined, we obtain certain lines. Choose the correct statement(s) regarding the lines |
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| 49. |
Change in the number of magnetic field around a coil induces: |
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Answer» Change in the number of magnetic field around a coil induces: |
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| 50. |
Why is tungsten used to make the filament of the bulb |
| Answer» Why is tungsten used to make the filament of the bulb | |
