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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. |
Three different arrangements of media are given through which a light ray is being passed. It is given that total internal reflection does not happen at any interface and that the light leaves from the opposite interface. In which of the following situations, the emergent ray would be parallel to the incident ray? |
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Answer» Three different arrangements of media are given through which a light ray is being passed. It is given that total internal reflection does not happen at any interface and that the light leaves from the opposite interface. In which of the following situations, the emergent ray would be parallel to the incident ray? |
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| 2. |
In the following figure, the part whose focal length can be changed is:- |
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Answer» In the following figure, the part whose focal length can be changed is:- |
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| 3. |
5.An old person is using a spectacle having bifocal lenses. The power of the two lenses L1 and L2 is +2D and -1D . Then the range within which he can see clearly is |
| Answer» 5.An old person is using a spectacle having bifocal lenses. The power of the two lenses L1 and L2 is +2D and -1D . Then the range within which he can see clearly is | |
| 4. |
If a light incident normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism find angle of deviation |
| Answer» If a light incident normally on one of the faces of the prism of refractive index 2 and the emergent ray just grazes the second face of the prism find angle of deviation | |
| 5. |
Which of the following statement is true regarding the hydropower plant? |
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Answer» Which of the following statement is true regarding the hydropower plant? |
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| 6. |
When combustion of coal takes place in insufficient air (oxygen), which gas is formed? |
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Answer» When combustion of coal takes place in insufficient air (oxygen), which gas is formed? |
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| 7. |
WHAT IS POTENTIAL METHOD TO FIND EQUIVALENT RESISTANCE |
| Answer» WHAT IS POTENTIAL METHOD TO FIND EQUIVALENT RESISTANCE | |
| 8. |
An electron of mass 0.90×10−30 kg under the action of a magnetic field moves in a circle of 2.0 cm radius at a speed of 3.0×106ms−1. If a proton of mass 1.8×10−27kg has to move in a circle of the same radius in the same magnetic field, then its speed will be ms−1. |
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Answer» An electron of mass 0.90×10−30 kg under the action of a magnetic field moves in a circle of 2.0 cm radius at a speed of 3.0×106ms−1. If a proton of mass 1.8×10−27kg has to move in a circle of the same radius in the same magnetic field, then its speed will be |
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| 9. |
36.) Calculate the rms speed of an ideal diatomic gas having molecular weight 32 gm/mol at Oc If the specific heats at constant pressure and volume are respectively 29.1 J mol1 K an 20.8 cal mol K-1 respectively |
| Answer» 36.) Calculate the rms speed of an ideal diatomic gas having molecular weight 32 gm/mol at Oc If the specific heats at constant pressure and volume are respectively 29.1 J mol1 K an 20.8 cal mol K-1 respectively | |
| 10. |
The rotation of the earth of radius R about its axis speeds up to a value such that a man at latitude angle 60∘ feels weightlessness. The duration of the day in such case will be |
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Answer» The rotation of the earth of radius R about its axis speeds up to a value such that a man at latitude angle 60∘ feels weightlessness. The duration of the day in such case will be |
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| 11. |
if current is directly proportional to volt , by ohm law, then why its happen so that high current has low voltage? |
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Answer» if current is directly proportional to volt , by ohm law, then why its happen so that high current has low voltage? |
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| 12. |
Write all four quantum numbers for the 19th electron of chromium |
| Answer» Write all four quantum numbers for the 19th electron of chromium | |
| 13. |
The refractive index of a converging lens is measured for violet, green and red colours produced by same source of light, and found to be μv, μg, μr respectively. The correct relation between the refractive index is: |
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Answer» The refractive index of a converging lens is measured for violet, green and red colours produced by same source of light, and found to be μv, μg, μr respectively. The correct relation between the refractive index is: |
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| 14. |
4 .What is mean by conjugated position,in finding out number of resonating structure. |
| Answer» 4 .What is mean by conjugated position,in finding out number of resonating structure. | |
| 15. |
What is an iris and where is it located? |
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Answer» What is an iris and where is it located? |
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| 16. |
One of the uses of a cathode ray tube is to |
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Answer» One of the uses of a cathode ray tube is to |
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| 17. |
A combination of 3 convex lenses is made. The focal length of lens I is +5 cm, lens II is +10 cm and lens III is +20 cm. Calculate the total power of the combination in dioptre? 35 |
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Answer» A combination of 3 convex lenses is made. The focal length of lens I is +5 cm, lens II is +10 cm and lens III is +20 cm. Calculate the total power of the combination in dioptre?
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| 18. |
Question 3A battery lights a bulb. Describe the energy changes involved in the process. |
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Answer» Question 3 A battery lights a bulb. Describe the energy changes involved in the process. |
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| 19. |
Fill in the following blanks with suitable words: (a) A current is a flow of ... For this to happen there must be a ...circuit. (b) Current is measured in .... using an ..... placed in .... in a circuit. |
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Answer» Fill in the following blanks with suitable words: |
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| 20. |
The energy equivalent of 1 kg of a substance is |
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Answer» The energy equivalent of 1 kg of a substance is |
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| 21. |
A rod of mass 2 kg and length 16 cm is placed horizontally inside a smooth hollow sphere of inner radius 10 cm. The magnitude of normal reaction force between sphere and rod at each end of rod is |
| Answer» A rod of mass 2 kg and length 16 cm is placed horizontally inside a smooth hollow sphere of inner radius 10 cm. The magnitude of normal reaction force between sphere and rod at each end of rod is | |
| 22. |
Find the angle of refraction in the following figure? |
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Answer» Find the angle of refraction in the following figure?
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| 23. |
2. A rectangular loop with current I has dimension as shown in figure . Find the magnetic flux through the infinite region to the right of line PQ |
| Answer» 2. A rectangular loop with current I has dimension as shown in figure . Find the magnetic flux through the infinite region to the right of line PQ | |
| 24. |
When light is incident on the surface of medium at angle i and refracted into a second medium at an angle r the graph of sin i vs sin r is as shown in the graph. From this, one can conclude that |
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Answer» When light is incident on the surface of medium at angle i and refracted into a second medium at an angle r the graph of sin i vs sin r is as shown in the graph. From this, one can conclude that
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| 25. |
C_6H_6 freezes at 5.5^oC. At what temperature will a solution of 10.44 g of C_4H_{10} in 200g of C_6H_6 freeze. K_f(C_6H_6)=5.12^oC/ |
| Answer» C_6H_6 freezes at 5.5^oC. At what temperature will a solution of 10.44 g of C_4H_{10} in 200g of C_6H_6 freeze. K_f(C_6H_6)=5.12^oC/ | |
| 26. |
The energy released by 1 kg uranium fission is |
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Answer» The energy released by 1 kg uranium fission is |
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| 27. |
Design a shaving mirror assuming that a person keeps it 10 cm from his face and views the magnified image of the face at the closest comfortable distance of 25 cm. Find the focal length of the mirror. |
| Answer» Design a shaving mirror assuming that a person keeps it 10 cm from his face and views the magnified image of the face at the closest comfortable distance of 25 cm. Find the focal length of the mirror. | |
| 28. |
What is specific resistance ? What is its unit ? |
| Answer» What is specific resistance ? What is its unit ? | |
| 29. |
If light source is at focus of concave lens, then after refraction the ray of light will __. |
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Answer» If light source is at focus of concave lens, then after refraction the ray of light will __. |
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| 30. |
a convergent beam is incident on concave mirror, what will be the nature of image |
| Answer» a convergent beam is incident on concave mirror, what will be the nature of image | |
| 31. |
What is the purpose of a switch in a circuit? Why is the switch put in the live wire? What precaution do you take while handling a switch? |
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Answer» What is the purpose of a switch in a circuit? Why is the switch put in the live wire? What precaution do you take while handling a switch? |
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| 32. |
If the work done in moving a charge of 2 mC across two points having potential difference V is 24 J, then the value of V is |
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Answer» If the work done in moving a charge of 2 mC across two points having potential difference V is 24 J, then the value of V is |
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| 33. |
If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be |
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Answer» If a long hollow copper pipe carries a direct current, the magnetic field associated with the current will be |
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| 34. |
If our human eye can see only 576 mega pixels images than why we make cameras more than 1000 mega pixels ?in camera also we can only se about 576 mega pixels only then why we make cameras which have more pixels than our eye? |
| Answer» If our human eye can see only 576 mega pixels images than why we make cameras more than 1000 mega pixels ?in camera also we can only se about 576 mega pixels only then why we make cameras which have more pixels than our eye? | |
| 35. |
what is photo electric emmission? |
| Answer» what is photo electric emmission? | |
| 36. |
Name the subjective property of light related to its wavelength. |
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Answer» Name the subjective property of light related to its wavelength. |
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| 37. |
what is charge on collidal particles? |
| Answer» what is charge on collidal particles? | |
| 38. |
One coulomb charge per second equals to ___ ampere. |
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Answer» One coulomb charge per second equals to |
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| 39. |
Which has a larger wavelength, red or blue light? |
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Answer» Which has a larger wavelength, red or blue light? |
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| 40. |
A metallic disc is being heated. Its area A(in metre square) at any time t is given by A = 5tsquare + 4t + 8. The rate of increase in area at t= 3 s is ? |
| Answer» A metallic disc is being heated. Its area A(in metre square) at any time t is given by A = 5tsquare + 4t + 8. The rate of increase in area at t= 3 s is ? | |
| 41. |
Why do petroleum and coal need to be used carefully? Are they non-renewable? |
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Answer» Why do petroleum and coal need to be used carefully? Are they non-renewable? |
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| 42. |
Fill in the following blank with a suitable word: Ohm's law states a relation between potential difference and ____________ |
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Answer» Fill in the following blank with a suitable word: |
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| 43. |
If temperature and volume of container are same, the pressure of a gas obeying vander Waal's equation is (1) Smaller than that of an ideal gas (2) Larger than that of an ideal gas (3) Same than that of an ideal gas (4) Can't predict |
| Answer» If temperature and volume of container are same, the pressure of a gas obeying vander Waal's equation is (1) Smaller than that of an ideal gas (2) Larger than that of an ideal gas (3) Same than that of an ideal gas (4) Can't predict | |
| 44. |
Calculate the effective resistance between the points A and B in the network shown below in the figure. |
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Answer» Calculate the effective resistance between the points A and B in the network shown below in the figure. |
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| 45. |
Question 17Explain how bats use ultrasound to catch a prey. |
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Answer» Question 17 Explain how bats use ultrasound to catch a prey. |
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| 46. |
How to compare polarization power of two species having different cation and anion? |
| Answer» How to compare polarization power of two species having different cation and anion? | |
| 47. |
Suppose you have three resistors of 20 Ω,50Ω and 100Ω. What minimum and maximum resistances can you obtain from these resistors ? |
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Answer» Suppose you have three resistors of 20 Ω,50Ω and 100Ω. What minimum and maximum resistances can you obtain from these resistors ? |
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| 48. |
26. The polarising angle of a glass slab for green light is54.74^° . What is the angle of minimum deviation of a rayof green light for an equilateral prism made of the samematerial as that of the glass slab?(Given: tan 54.74 1.414)(a) 54.74^° (c) 45^° (b) 60^° (d) 30^° |
| Answer» 26. The polarising angle of a glass slab for green light is54.74^° . What is the angle of minimum deviation of a rayof green light for an equilateral prism made of the samematerial as that of the glass slab?(Given: tan 54.74 1.414)(a) 54.74^° (c) 45^° (b) 60^° (d) 30^° | |
| 49. |
Work done by an external agent in rotating an electric dipole slowly from the position of stable equilibrium to unstable equilibrium in uniform electric field |
| Answer» Work done by an external agent in rotating an electric dipole slowly from the position of stable equilibrium to unstable equilibrium in uniform electric field | |
| 50. |
An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. The current drawn is: |
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Answer» An electrical appliance is rated 1500 W, 250 V. This appliance is connected to 250 V mains. The current drawn is: |
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