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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. |
The ray diagram given below illustrates the experimental set up for the determination of the focal length of a converging lens using an auxiliary mirror: Two characteristics of the image formed are |
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Answer» The ray diagram given below illustrates the experimental set up for the determination of the focal length of a converging lens using an auxiliary mirror:
Two characteristics of the image formed are |
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| 2. |
Question 11 (ii)Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of(ii)4Ω? |
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Answer» Question 11 (ii) Show how you would connect three resistors, each of resistance 6 Ω, so that the combination has a resistance of (ii)4Ω? |
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| 3. |
Had the atmosphere not been present, what would be the appearance of sky? [2 MARKS] |
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Answer» Had the atmosphere not been present, what would be the appearance of sky? [2 MARKS] |
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| 4. |
27.A charged particle , having charge q1 accelerated through a potential difference V enters a magnetic field in which it experience a force F and when v is increased to 5V. then find value of Force experienced? |
| Answer» 27.A charged particle , having charge q1 accelerated through a potential difference V enters a magnetic field in which it experience a force F and when v is increased to 5V. then find value of Force experienced? | |
| 5. |
An electron beam is moving vertically upwards. If it passes through a magnetic field which is directed from South to north in a horizontal plane, then in which direction will the beam deflect? |
| Answer» An electron beam is moving vertically upwards. If it passes through a magnetic field which is directed from South to north in a horizontal plane, then in which direction will the beam deflect? | |
| 6. |
The heat energy released during nuclear fission and fusion is due to the : (a) conversion of stored chemicals into energy (b) conversion of momentum into energy (c) conversion of mass into energy (d) conversion of magnetism into energy |
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Answer» The heat energy released during nuclear fission and fusion is due to the : |
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| 7. |
What will be the end moment of a fixed beam with a uniformly distributed load of ′w′ kN/m2 and a length of 'l' m ? |
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Answer» What will be the end moment of a fixed beam with a uniformly distributed load of ′w′ kN/m2 and a length of 'l' m ? |
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| 8. |
in successive experimental measurements the refractive index of Glass turned out to be 1.54 1.45 1.53 1.56 1.4 1.54 compute 1st main refractive index II mean absolute error third fractional error and percentage error Express the refractive index with the error limits. |
| Answer» in successive experimental measurements the refractive index of Glass turned out to be 1.54 1.45 1.53 1.56 1.4 1.54 compute 1st main refractive index II mean absolute error third fractional error and percentage error Express the refractive index with the error limits. | |
| 9. |
Cross-section of a thick cylinderical pipe of inner radius r and outer radius R is shown in figure. Refractive index of glass of cylinder is μ. A ray AB gracing inner surface after refraction becomes parallel to x -axis, then BC is? All rays are in plane of page. |
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Answer» Cross-section of a thick cylinderical pipe of inner radius r and outer radius R is shown in figure. Refractive index of glass of cylinder is μ. A ray AB gracing inner surface after refraction becomes parallel to x -axis, then BC is? All rays are in plane of page. |
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| 10. |
The far point of a myopic eye is 20 cm . Find the power of his lens used. |
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Answer» The far point of a myopic eye is 20 cm . Find the power of his lens used. |
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| 11. |
A block of mass m having charge q is placed on smooth horizontal table and connected to wall through an unstretched string of spring cons†an t k. A uniform electric field is switched on at t=0 . Maximu speed.acquired by the block |
| Answer» A block of mass m having charge q is placed on smooth horizontal table and connected to wall through an unstretched string of spring cons†an t k. A uniform electric field is switched on at t=0 . Maximu speed.acquired by the block | |
| 12. |
A uniform magnetic field exists in a circular region of radius r. The magnetic field B points in-ward as shown in the figure. The time during which electron moves in the region is given by, Nmtan−1(eBrvm)eB, then the value N will be_________ (see the figure) |
Answer» A uniform magnetic field exists in a circular region of radius r. The magnetic field B points in-ward as shown in the figure. The time during which electron moves in the region is given by, Nmtan−1(eBrvm)eB, then the value N will be_________  |
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| 13. |
The potential energy of a system of two particles is given by U(x)=ax2−bx . Find the minimum potential energy of the system, where x is the distance of separation and a,b are positive constants. |
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Answer» The potential energy of a system of two particles is given by U(x)=ax2−bx . Find the minimum potential energy of the system, where x is the distance of separation and a,b are positive constants. |
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| 14. |
ntA planoconvex lens of refractive index 1.5 and radious of curvature 30 cm ,is silvered at the curved surface. Now this lens has been used to form the image of an object.At what distance from this lens an object be placed in order to have a real image of the size of the objectn nta)20 cmn ntb)30 cmn ntc)60 cmn ntd)80 cmn |
| Answer» ntA planoconvex lens of refractive index 1.5 and radious of curvature 30 cm ,is silvered at the curved surface. Now this lens has been used to form the image of an object.At what distance from this lens an object be placed in order to have a real image of the size of the objectn nta)20 cmn ntb)30 cmn ntc)60 cmn ntd)80 cmn | |
| 15. |
What is the difference between a renewable and a non-renewable source of energy? Explain with examples. |
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Answer» What is the difference between a renewable and a non-renewable source of energy? Explain with examples. |
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| 16. |
Differentiate between a real and a virtual image. |
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Answer» Differentiate between a real and a virtual image. |
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| 17. |
The values of resistances marked on the coils R1 and R2 are found to be correct. A student connects the given resistors in the following manner (as shown in Figure 1).He then connects the terminals marked X and Y of the above combination of resistors R1 and R2 to the terminals marked X and Y in the circuit (shown in Figure 2).The average value of the ratio V/I in the observations recorded in the circuit would be:(1) 9 Ω(2) 6 Ω(3) 3 Ω(4) 2 Ω |
Answer» The values of resistances marked on the coils R1 and R2 are found to be correct. A student connects the given resistors in the following manner (as shown in Figure 1). He then connects the terminals marked X and Y of the above combination of resistors R1 and R2 to the terminals marked X and Y in the circuit (shown in Figure 2).  The average value of the ratio V/I in the observations recorded in the circuit would be: (1) 9 Ω (2) 6 Ω (3) 3 Ω (4) 2 Ω |
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| 18. |
for a ring and a disc ,if torque applied is different but they have the same kinetic energy ,then the number of revolutions before coming to rest is same for both (or ) different for both?. kindly explain. |
| Answer» for a ring and a disc ,if torque applied is different but they have the same kinetic energy ,then the number of revolutions before coming to rest is same for both (or ) different for both?. kindly explain. | |
| 19. |
Why alternating current doesn't allow much loss of energy as compared to direct current |
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Answer» Why alternating current doesn't allow much loss of energy as compared to direct current |
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| 20. |
a ball is moving with speed 20 m/s collides with a smooth surface. the magnitude of change in velocity will b |
| Answer» a ball is moving with speed 20 m/s collides with a smooth surface. the magnitude of change in velocity will b | |
| 21. |
The distance travelled by an object thrown upwards in t seconds is 30t − 4.9t2 metres. After how much time would it fall down? At what all times would it be 20 metres above the ground? |
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Answer» The distance travelled by an object thrown upwards in t seconds is 30t − 4.9t2 metres. After how much time would it fall down? At what all times would it be 20 metres above the ground? |
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| 22. |
A satellite is moving with speed v in a circular orbit about the earth. An object of mass 2m is ejected, from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection the kinetic energy of object is ? ( does we consider potential energy of satellite and object while applying energy conservation |
| Answer» A satellite is moving with speed v in a circular orbit about the earth. An object of mass 2m is ejected, from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection the kinetic energy of object is ? ( does we consider potential energy of satellite and object while applying energy conservation | |
| 23. |
Two parallel wires carrying same current I experience a force F. The graph which gives a straight line is |
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Answer» Two parallel wires carrying same current I experience a force F. The graph which gives a straight line is |
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| 24. |
31. What is the relationship between harmonic mean, geometric mean,and arithmetic mean |
| Answer» 31. What is the relationship between harmonic mean, geometric mean,and arithmetic mean | |
| 25. |
Sir I am Shaun job of class 10 I have a doubt in physics on the topic of optics, this is the question Sir What is the field of view of a mirror, is it measured in terms of its area? How does a convex mirror create a wider field of view?how can we prove that a convex mirror creates a wider field of view? Thank you for your time Sir Shaun |
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Answer» Sir I am Shaun job of class 10 I have a doubt in physics on the topic of optics, this is the question Sir What is the field of view of a mirror, is it measured in terms of its area? How does a convex mirror create a wider field of view?how can we prove that a convex mirror creates a wider field of view? Thank you for your time Sir Shaun |
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| 26. |
Question 15 (c)State the rule to determine the direction of a(iii) current induced in a coil due to its rotation in a magnetic field. |
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Answer» Question 15 (c) State the rule to determine the direction of a (iii) current induced in a coil due to its rotation in a magnetic field. |
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| 27. |
What is the resistance of an ideal voltmeter and ideal ammeter? |
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Answer» What is the resistance of an ideal voltmeter and ideal ammeter? |
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| 28. |
How the focal length can be positive on left side of the same side of the object |
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Answer» How the focal length can be positive on left side of the same side of the object |
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| 29. |
What are electric field lines? What are their properties?What is uniform and non-uniform electric field? |
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Answer» What are electric field lines? What are their properties? What is uniform and non-uniform electric field? |
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| 30. |
two point charges q1 and q2 are such that q1 q2 |
| Answer» two point charges q1 and q2 are such that q1 q2<0 . what is the nature of charges are like or unlike charges. | |
| 31. |
How does electricity flow as we press the switch? |
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Answer» How does electricity flow as we press the switch? |
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| 32. |
Which among the following sources of energy are renewable? |
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Answer» Which among the following sources of energy are renewable? |
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| 33. |
If the diameter of a resistance wire is halved, then its resistance becomes: (a) four times (b) half (c) one - fourth (d) two times |
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Answer» If the diameter of a resistance wire is halved, then its resistance becomes: |
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| 34. |
A nucleus of mass M+△m is at rest and decays into two daughter nuclei of equal mass M2 each. Speed of light is c. The binding energy per nucleon for the parent nucleus is E1 and that for the daughter nuclei is E2. Then |
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Answer» A nucleus of mass M+△m is at rest and decays into two daughter nuclei of equal mass M2 each. Speed of light is c. |
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| 35. |
List down the causes and consequences of deforestation? |
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Answer» List down the causes and consequences of deforestation? |
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| 36. |
a charged particle q projected from origin ong +ve X axis.uniform magnetic field B=-B_oK.find co-ordinate of position of charge particle when x co ordinate become zer |
| Answer» a charged particle q projected from origin ong +ve X axis.uniform magnetic field B=-B_oK.find co-ordinate of position of charge particle when x co ordinate become zer | |
| 37. |
How much power can be generated using single solar cell ? |
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Answer» How much power can be generated using single solar cell ? |
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| 38. |
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distance should he measure to get the focal length of the mirror ? (a) MW (b) MS (c) SW (d) MW - MS |
Answer» A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distance should he measure to get the focal length of the mirror ? (a) MW (b) MS (c) SW (d) MW - MS |
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| 39. |
Why do we classify the melting of ice as a physical change? |
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Answer» Why do we classify the melting of ice as a physical change? |
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| 40. |
If an atom gains an electron, shouldn't it be positively charged since it might now want to give away its extra electron. But it is also considered to be negatively charged due to presence of excess electrons |
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Answer» If an atom gains an electron, shouldn't it be positively charged since it might now want to give away its extra electron. But it is also considered to be negatively charged due to presence of excess electrons |
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| 41. |
ntA planoconvex lens of refractive index 1.5 and radius of curvature 30 cm ,is silvered at the curved surface.Now this lens has been used to form the image of an object.At what distance from this lens an object be placed in order to have a real image of the size of the objectn nta)20 cmn ntb)30 cmn ntc)60 cmn ntd)80 cmn |
| Answer» ntA planoconvex lens of refractive index 1.5 and radius of curvature 30 cm ,is silvered at the curved surface.Now this lens has been used to form the image of an object.At what distance from this lens an object be placed in order to have a real image of the size of the objectn nta)20 cmn ntb)30 cmn ntc)60 cmn ntd)80 cmn | |
| 42. |
A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 divisions below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31st division on the circular scale coincides with the reference line. The diameter of the lead shot is: |
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Answer» A student is trying to measure the diameter of a lead shot using a screw gauge. The pitch of the screw gauge is 1 mm and has 50 divisions on its circular scale. When the two jaws of the screw gauge are in contact with each other, the zero of the circular scale lies 6 divisions below the line of graduation. When the lead shot is placed between the jaws, 3 linear scale divisions are clearly visible while 31st division on the circular scale coincides with the reference line. The diameter of the lead shot is: |
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| 43. |
Which of the following changes occur when you walk out of bright sunshine into a poorly lit room ? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller |
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Answer» Which of the following changes occur when you walk out of bright sunshine into a poorly lit room ? (a) the pupil becomes larger (b) the lens becomes thicker (c) the ciliary muscle relaxes (d) the pupil becomes smaller |
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| 44. |
After reading the interview of Wangari Maathai, you are inspired and motivated to do a summer training under her at one of the Research Stations. Write an email to Wangari Mathai. In your mail describe Wangari's influence on you and your desire to work under her and why you should be given a chance to work under her. |
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Answer» After reading the interview of Wangari Maathai, you are inspired and motivated to do a summer training under her at one of the Research Stations. Write an email to Wangari Mathai. In your mail describe Wangari's influence on you and your desire to work under her and why you should be given a chance to work under her. |
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| 45. |
An electric press is rated 750 W ,230 V .Calculate the electrical energy consumed by the press in 16 hours. |
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Answer» An electric press is rated 750 W ,230 V .Calculate the electrical energy consumed by the press in 16 hours. |
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| 46. |
a 200W bulb emits monochromatic light of wavelength 1400 angstorm and only 10% of the energy is emitted as light.the no. of photons emitted by the bulb per second will be |
| Answer» a 200W bulb emits monochromatic light of wavelength 1400 angstorm and only 10% of the energy is emitted as light.the no. of photons emitted by the bulb per second will be | |
| 47. |
The frequency of direct current (d.c.) is : (a) 0 Hz (b) 50 Hz (c) 60 Hz (d) 100 Hz |
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Answer» The frequency of direct current (d.c.) is : (a) 0 Hz (b) 50 Hz (c) 60 Hz (d) 100 Hz |
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| 48. |
For a rotational equilibrium also known as a dynamic equilibrium has ___ |
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Answer» For a rotational equilibrium also known as a dynamic equilibrium has |
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| 49. |
Which of the following statement is true for TIR? |
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Answer» Which of the following statement is true for TIR? |
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| 50. |
65.Why does current in a steady state not flow in a capacitor connected across a battery |
| Answer» 65.Why does current in a steady state not flow in a capacitor connected across a battery | |
