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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. |
who discovered proton ? is it goldstein or rutherford ? |
| Answer» who discovered proton ? is it goldstein or rutherford ? | |
| 2. |
What does the given diagram represent? |
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Answer» What does the given diagram represent?
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| 3. |
What is the coordination no. at edge centre. Explain the concept involved |
| Answer» What is the coordination no. at edge centre. Explain the concept involved | |
| 4. |
Ganeshan set up an experiment using two bar magnets one of which is marked N (North pole) and S (South pole) as shown in the figure. He noticed that the upper magnet is suspended in air and is getting repelled. Identify X and Y poles of the upper magnet. |
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Answer» Ganeshan set up an experiment using two bar magnets one of which is marked N (North pole) and S (South pole) as shown in the figure. He noticed that the upper magnet is suspended in air and is getting repelled. |
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| 5. |
defination of pitch |
| Answer» defination of pitch | |
| 6. |
The force acting between two point charges kept at a certain distance is phi. Now magnitudes of charge s are doubled and distance between them is halved, the force acting between them is__ |
| Answer» The force acting between two point charges kept at a certain distance is phi. Now magnitudes of charge s are doubled and distance between them is halved, the force acting between them is__ | |
| 7. |
Question 3 (b) Give reasons (b) A gas exerts pressure on the walls of the container. |
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Answer» Question 3 (b) Give reasons (b) A gas exerts pressure on the walls of the container. |
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| 8. |
2 particles of mass m &M are at a dis†an ce 'r' from each other.Calculate gravitational potential at that point where net gravitational field is zer |
| Answer» 2 particles of mass m &M are at a dis†an ce 'r' from each other.Calculate gravitational potential at that point where net gravitational field is zer | |
| 9. |
Fill in the blanks(1) A ray of light parallel to principal axis after reflection from concave mirror passes through _______(2) The focal length of _______ lens is positive.(3) The image of an object is formed behind _______ in hypermetropia.(4) An optical device used by watch repairers is _______(5) The power of spectacle for myopic eye is_______. |
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Answer» Fill in the blanks (1) A ray of light parallel to principal axis after reflection from concave mirror passes through _______ (2) The focal length of _______ lens is positive. (3) The image of an object is formed behind _______ in hypermetropia. (4) An optical device used by watch repairers is _______ (5) The power of spectacle for myopic eye is_______. |
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| 10. |
66.Two resistors are connected in parallel , find the equivalent resistance-- R1 = 100+- 3 R2 = 200+-4 |
| Answer» 66.Two resistors are connected in parallel , find the equivalent resistance-- R1 = 100+- 3 R2 = 200+-4 | |
| 11. |
Why does ice at 00C have a better cooling effect than water at 00C? |
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Answer» Why does ice at 00C have a better cooling effect than water at 00C? |
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| 12. |
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to: |
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Answer» <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is μ, then the angle of incidence is nearly equal to: |
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| 13. |
Sound travels at the fastest speed in which medium? |
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Answer» Sound travels at the fastest speed in which medium? |
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| 14. |
A satellite is in an elliptical orbit around a planet P. It is observed that the velocity of the satellite when it is farthest from the planet is 6 times less than that when it is closest to the planet, the ratio of distance between the satellite and the planet at closest and farthest points is: |
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Answer» A satellite is in an elliptical orbit around a planet P. It is observed that the velocity of the satellite when it is farthest from the planet is 6 times less than that when it is closest to the planet, the ratio of distance between the satellite and the planet at closest and farthest points is: |
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| 15. |
What is mean by drift velocity of electrons and how the electrons move in a conductor? |
| Answer» What is mean by drift velocity of electrons and how the electrons move in a conductor? | |
| 16. |
Question 13 Suppose a ball of mass m is thrown vertically upward with an initial speed, v its speed decreases continuously till it becomes zero. Thereafter, the ball begins to fall downward and attains the speed vagain before striking the ground. It implies that the magnitude of initial and final momentum of the ball is same. Yet, it is not an example of conservation of momentum. Explain why? |
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Answer» Question 13 Suppose a ball of mass m is thrown vertically upward with an initial speed, v its speed decreases continuously till it becomes zero. Thereafter, the ball begins to fall downward and attains the speed vagain before striking the ground. It implies that the magnitude of initial and final momentum of the ball is same. Yet, it is not an example of conservation of momentum. Explain why? |
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| 17. |
What are coaxial lenses and where are they used? |
| Answer» What are coaxial lenses and where are they used? | |
| 18. |
The most common fuel used in the nuclear reactor is ___ |
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Answer» The most common fuel used in the nuclear reactor is |
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| 19. |
The sides of an isosceles right prism are coatedwith a reflecting coating . A ray of light falls on the hypotenuse at anarbitrary angle, i . For what value of'i' the ray leaving the prism is parallelto the incident ray? |
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Answer» The sides of an isosceles right prism are coated
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| 20. |
The three lowest frquencies for standing waves on the wire of a musical instrument 9.88 m long and havingmass 0.107 kg stretched under the tension of 236 N, are: |
| Answer» The three lowest frquencies for standing waves on the wire of a musical instrument 9.88 m long and havingmass 0.107 kg stretched under the tension of 236 N, are: | |
| 21. |
Three point charges q each are placed at x = –a, x = 0 and x = +a. The potential energy of system is |
| Answer» Three point charges q each are placed at x = –a, x = 0 and x = +a. The potential energy of system is | |
| 22. |
_____ is an arrangement that is always in contact with the slip rings, which allows current to flows to the external circuit. |
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Answer» _____ is an arrangement that is always in contact with the slip rings, which allows current to flows to the external circuit. |
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| 23. |
The image formed by a plane mirror is : (a) real (b) virtual (c) virtual with lateral inversion (d) real with lateral inversion. |
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Answer» The image formed by a plane mirror is : (a) real (b) virtual (c) virtual with lateral inversion (d) real with lateral inversion. |
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| 24. |
Two paper screens A and B are separated bydistance 100 m. A bullet penetrates A and B, atpoints P and Q respectively, where Q is 10 cmbelow P. If bullet is travelling horizontally at thetime of hitting A, the velocity of bullet at A isnearly(1) 100 m/s(2) 200 m/s(3) 600 m/s(4) 700 m/s |
| Answer» Two paper screens A and B are separated bydistance 100 m. A bullet penetrates A and B, atpoints P and Q respectively, where Q is 10 cmbelow P. If bullet is travelling horizontally at thetime of hitting A, the velocity of bullet at A isnearly(1) 100 m/s(2) 200 m/s(3) 600 m/s(4) 700 m/s | |
| 25. |
30. The following series resonant L-C-R circuit has a quality factor (Q-factor) 0.4 and a bandwidth of 1.3 kHz. The value of inductance is then A)0.1 B 0.94 H C 2 H D 10 H E 5 H |
| Answer» 30. The following series resonant L-C-R circuit has a quality factor (Q-factor) 0.4 and a bandwidth of 1.3 kHz. The value of inductance is then A)0.1 B 0.94 H C 2 H D 10 H E 5 H | |
| 26. |
Calculate reduction potential of cl electrode if cl2 gas {5 atm} is bubbled in a solution of 0.1M kcl |
| Answer» Calculate reduction potential of cl electrode if cl2 gas {5 atm} is bubbled in a solution of 0.1M kcl | |
| 27. |
A straight solenoid of length 1 m has 5000 turns in the primary and 200 turns in the secondary. If the area of cross-section is 4 cm2, the mutual inductance between primary and secondary will be |
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Answer» A straight solenoid of length 1 m has 5000 turns in the primary and 200 turns in the secondary. If the area of cross-section is 4 cm2, the mutual inductance between primary and secondary will be |
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| 28. |
A thin circular plate of mass M and radius R has its density varying as ρ(r)=ρ0r with ρ0 as constant and r is the distance from its centre. The moment of inertia of the circular plate about an axis perpendicular to the plate and passing through its edge is I=aMR2. The value of the coefficient a is |
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Answer» A thin circular plate of mass M and radius R has its density varying as ρ(r)=ρ0r with ρ0 as constant and r is the distance from its centre. The moment of inertia of the circular plate about an axis perpendicular to the plate and passing through its edge is I=aMR2. The value of the coefficient a is |
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| 29. |
Why the colour of sky appear in blue colour |
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Answer» Why the colour of sky appear in blue colour |
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| 30. |
In a DC generator, the induced e.m.f. in the armature is : |
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Answer» In a DC generator, the induced e.m.f. in the armature is : |
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| 31. |
A given length of a wire is doubled on itself and this process is repeated once again then by what factor does the resistance of the wire change? |
| Answer» A given length of a wire is doubled on itself and this process is repeated once again then by what factor does the resistance of the wire change? | |
| 32. |
A 2 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm. The distance of the object from the lens is 15 cm. Find the position and nature of the image. |
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Answer» A 2 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 10 cm. The distance of the object from the lens is 15 cm. Find the position and nature of the image. |
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| 33. |
91.The current through the 5 ohm resistor is (A) 2 A (B) 4 A (C) 0 (D) 1 A |
| Answer» 91.The current through the 5 ohm resistor is (A) 2 A (B) 4 A (C) 0 (D) 1 A | |
| 34. |
Each of the resistance shown in figure is R. The equivalent resistance between A and E is xR12. Then x is |
Answer» Each of the resistance shown in figure is R. The equivalent resistance between A and E is xR12. Then x is  |
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| 35. |
If two thin thin convex lens of focal length f and the space between two lenses is filled with same glass then what is effective focal length |
| Answer» If two thin thin convex lens of focal length f and the space between two lenses is filled with same glass then what is effective focal length | |
| 36. |
Match the following devices with their type of units: |
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Answer» Match the following devices with their type of units: |
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| 37. |
Two particles of masses m and M are placed at a distance r. The ratio of gravitational force on mass m due to mass M and on mass M due to mass m is |
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Answer» Two particles of masses m and M are placed at a distance r. The ratio of gravitational force on mass m due to mass M and on mass M due to mass m is |
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| 38. |
in emw amplitude of electric field is 1. frequency is 5\ast10¹⁴. average energy density |
| Answer» in emw amplitude of electric field is 1. frequency is 5\ast10¹⁴. average energy density | |
| 39. |
When distance between nucleons is less than 0.8 fermi, why strong nuclear force become repulsive? |
| Answer» When distance between nucleons is less than 0.8 fermi, why strong nuclear force become repulsive? | |
| 40. |
The logic circuit below has the input waveforms A and B as shown. Pick out the correct output waveform. |
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Answer» The logic circuit below has the input waveforms A and B as shown. Pick out the correct output waveform. |
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| 41. |
For a circular loop of radius 0.02 m, the magnetic flux is 0.5×10−2 weber. Calculate the strength of the magnetic field around the loop which is perpendicular to the plane of the loop. |
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Answer» For a circular loop of radius 0.02 m, the magnetic flux is 0.5×10−2 weber. Calculate the strength of the magnetic field around the loop which is perpendicular to the plane of the loop. |
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| 42. |
Find the electric field vector at P(a, a, a) due to three infinitely long lines of charges along the x,y and z− axis, respectively. The charge density, i.e., charge per unit length of each wire is λ. |
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Answer» Find the electric field vector at P(a, a, a) due to three infinitely long lines of charges along the x,y and z− axis, respectively. The charge density, i.e., charge per unit length of each wire is λ. |
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| 43. |
If accelerating voltage of X-ray tube is 13 kv find minimum wavelength of X-ray |
| Answer» If accelerating voltage of X-ray tube is 13 kv find minimum wavelength of X-ray | |
| 44. |
Two conducting wires of the same material and of equal lengths, and equal diameter are first connected in series, and then in parallel in a circuit across the same potential difference. The ratio of heat produced in the same time in series and parallel combinations would be: |
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Answer» Two conducting wires of the same material and of equal lengths, and equal diameter are first connected in series, and then in parallel in a circuit across the same potential difference. The ratio of heat produced in the same time in series and parallel combinations would be: |
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| 45. |
What is a conventional flow of current? |
| Answer» What is a conventional flow of current? | |
| 46. |
55. The focal length of a thin convex lens for red and blue colors is 100.5cm and99.5cm.The dispersive power of the lens is (A)0.01 (B)0.02 (C)1.005 (D)0.995 |
| Answer» 55. The focal length of a thin convex lens for red and blue colors is 100.5cm and99.5cm.The dispersive power of the lens is (A)0.01 (B)0.02 (C)1.005 (D)0.995 | |
| 47. |
Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block : (a) if it hits the glass block at 90° (that is, perpendicular to the glass block) (b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block). |
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Answer» Draw a labelled ray diagram to show how a ray of light passes through a parallel sided glass block : (a) if it hits the glass block at 90° (that is, perpendicular to the glass block) (b) if it hits the glass block at an angle other than 90° (that is, obliquely to the glass block). |
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| 48. |
Distinguish between electric motor and electric generator |
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Answer» Distinguish between electric motor and electric generator |
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| 49. |
What is the difference between heat and temperature? Does one cause the other? |
| Answer» What is the difference between heat and temperature? Does one cause the other? | |
| 50. |
Write answers to the following questions in your own words .(a) What is meant by fossil fuel? What are their types ?(b) Make a list of the components we obtain from mineral oil.(c) What do we get from forests ?(d) What are the items included in ocean resources? What are their uses?(e) Why should we prevent the wastage of fuel used for vehicles?(f) Why is the diversity of plants and animals in the forests declining?(g) Write the names of five minerals and the useful substances obtained from them.(h) Name the two important stages in the process of obtaining metals from ores ? |
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Answer» Write answers to the following questions in your own words . (a) What is meant by fossil fuel? What are their types ? (b) Make a list of the components we obtain from mineral oil. (c) What do we get from forests ? (d) What are the items included in ocean resources? What are their uses? (e) Why should we prevent the wastage of fuel used for vehicles? (f) Why is the diversity of plants and animals in the forests declining? (g) Write the names of five minerals and the useful substances obtained from them. (h) Name the two important stages in the process of obtaining metals from ores ? |
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