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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. |
1. (a) What is the function of (i) live wire (ii) neutral wire (iii) earth wire (b) what is overloading and short circuiting. |
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Answer» 1. (a) What is the function of (i) live wire (ii) neutral wire (iii) earth wire (b) what is overloading and short circuiting. |
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| 2. |
Why the duration bw lub sound and dub sound is .3 sec. It should be 0.3-0.1sec= .2 sec? |
| Answer» Why the duration bw lub sound and dub sound is .3 sec. It should be 0.3-0.1sec= .2 sec? | |
| 3. |
The following diagram indicated the energy levels of a certain atom when the system moves from 4E level to E. A photon of wavelength λ1 is emitted. The wavelength of photon emitted during its transition from 73E level to E is λ2. The ratio λ1λ2 will be - |
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Answer» The following diagram indicated the energy levels of a certain atom when the system moves from 4E level to E. A photon of wavelength λ1 is emitted. The wavelength of photon emitted during its transition from 73E level to E is λ2. The ratio λ1λ2 will be - |
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| 4. |
If a current through an AC circuit is, i=2√2sin(314t). What is the average current for the full cycle through the circuit ? |
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Answer» If a current through an AC circuit is, i=2√2sin(314t). What is the average current for the full cycle through the circuit ? |
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| 5. |
A body has a negative charge of 2 micro coulomb. If body has 2.25*10^12 protons , then number of elctrons present in the body will be |
| Answer» A body has a negative charge of 2 micro coulomb. If body has 2.25*10^12 protons , then number of elctrons present in the body will be | |
| 6. |
A long solenoid has 800 turns per unit length of solenoid. A current of 1.6 A flows jthrough it.The magnetic induction at the end of the solenoid on its axis is? |
| Answer» A long solenoid has 800 turns per unit length of solenoid. A current of 1.6 A flows jthrough it.The magnetic induction at the end of the solenoid on its axis is? | |
| 7. |
(a) Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot. (b) Describe the working of the human eye with the help of the above diagram. (c) How does the eye adjust itself to deal with light of varying intensity ? |
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Answer» (a) Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot. (b) Describe the working of the human eye with the help of the above diagram. (c) How does the eye adjust itself to deal with light of varying intensity ? |
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| 8. |
a ray parallel to principal axis incident at 30^° from the normal to the concave mirror having radius of curvature R. The point on the principal axis where rays are focused is Q such that PQ is (assume aperture of mirror is large) |
| Answer» a ray parallel to principal axis incident at 30^° from the normal to the concave mirror having radius of curvature R. The point on the principal axis where rays are focused is Q such that PQ is (assume aperture of mirror is large) | |
| 9. |
Write a note on Apollo missions. |
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Answer» Write a note on Apollo missions. |
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| 10. |
Acceleration of ball inside water |
| Answer» Acceleration of ball inside water | |
| 11. |
A student puts his pencil into an empty trough and observes the pencil from the position as indicated in Fig. 4.41. (i) What change will be observed in the appearance of the pencil when water is poured into the trough? (ii) Name the phenomenon which accounts for the above-stated observation. (iii) Complete the diagram showing how the student's eye sees the pencil through the water. |
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Answer»
A student puts his pencil into an empty trough and observes the pencil from the position as indicated in Fig. 4.41. (i) What change will be observed in the appearance of the pencil when water is poured into the trough? (ii) Name the phenomenon which accounts for the above-stated observation. (iii) Complete the diagram showing how the student's eye sees the pencil through the water. |
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| 12. |
The condition for an electric charge to flow from one point to other is that the two points must have electric: |
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Answer» The condition for an electric charge to flow from one point to other is that the two points must have electric: |
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| 13. |
Question 1 (a)Judge the equivalent resistance when the following are connected in parallel−(a) 1Ω and 106Ω. |
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Answer» Question 1 (a) Judge the equivalent resistance when the following are connected in parallel−(a) 1Ω and 106Ω. |
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| 14. |
Prove the law of conservation of energy. |
| Answer» Prove the law of conservation of energy. | |
| 15. |
An illuminated bulb and a screen are placed 90 cm apart. What is the focal length of the lens required to produce a real image twice the size of object, on the screen? |
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Answer» An illuminated bulb and a screen are placed 90 cm apart. What is the focal length of the lens required to produce a real image twice the size of object, on the screen? |
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| 16. |
Why is a convex lens called a converging lens and a concave lens called a diverging lens? |
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Answer» Why is a convex lens called a converging lens and a concave lens called a diverging lens? |
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| 17. |
What I'll a refrigerator come under 15 A device's ? |
| Answer» What I'll a refrigerator come under 15 A device's ? | |
| 18. |
Find the reading of the ammeters A1, (in ampere) connected as shown in the network.(Answer in integer value) |
Answer» Find the reading of the ammeters A1, (in ampere) connected as shown in the network.(Answer in integer value) |
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| 19. |
if pKw of water is obtained 13.48 on increasing the temperature then H^+ ion concentration in water will be (a)10^-7 (b) 3*10^-13 (3)3.4*10^-13 (4) 1.8*10^-7 |
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Answer» if pKw of water is obtained 13.48 on increasing the temperature then H^+ ion concentration in water will be (a)10^-7 (b) 3*10^-13 (3)3.4*10^-13 (4) 1.8*10^-7 |
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| 20. |
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy? |
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Answer» A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy? |
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| 21. |
if the pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1^° C then initial temperature must be? |
| Answer» if the pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1^° C then initial temperature must be? | |
| 22. |
13.The value of g on the earth surface is 980 cm/s2.its value at a height of 64km from earth surface is? |
| Answer» 13.The value of g on the earth surface is 980 cm/s2.its value at a height of 64km from earth surface is? | |
| 23. |
What is electrical resistivity of a material what is its unit ? Study the factors on which the resistance of conducting wire depends? |
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Answer» What is electrical resistivity of a material what is its unit ? Study the factors on which the resistance of conducting wire depends? |
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| 24. |
In a steam power plant based on ideal Rankine cycle, superheated steam enters the turbine at 1.4 MPa and 500∘C where it expands to a condensor pressure of 0.01 MPa. Superheated steam properties are; At 1.4 MPa and 500∘C,h=3474.1 kJ/kg and s=7.6027 kJ/kgK Saturated water properties are given in below table: The cycle efficiency is ____% (Correct upto two decimal places).Take specific volume of saturated liquid at 0.01.MPa as 0.00101 m3/kg.32.36 |
Answer» In a steam power plant based on ideal Rankine cycle, superheated steam enters the turbine at 1.4 MPa and 500∘C where it expands to a condensor pressure of 0.01 MPa. Superheated steam properties are; At 1.4 MPa and 500∘C,h=3474.1 kJ/kg and s=7.6027 kJ/kgK Saturated water properties are given in below table: The cycle efficiency is ____% (Correct upto two decimal places). Take specific volume of saturated liquid at 0.01.MPa as 0.00101 m3/kg.
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| 25. |
A force \overrightarrow F=(6i-8j +10k)N produces acceleration 2 ms¯² in a body. Calculate the mass of the body. |
| Answer» A force \overrightarrow F=(6i-8j +10k)N produces acceleration 2 ms¯² in a body. Calculate the mass of the body. | |
| 26. |
Which of the following is not a gel? |
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Answer» Which of the following is not a gel? |
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| 27. |
Discuss in detail the measures taken by the West Bengal Forest Department in 1972 to prevent the degradation of Sal forests.How was the existing policy changed? [5 MARKS] |
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Answer» Discuss in detail the measures taken by the West Bengal Forest Department in 1972 to prevent the degradation of Sal forests.How was the existing policy changed? [5 MARKS] |
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| 28. |
Which natural resource was used as a fuel for steam rails? Explain its characteristics. [3 MARKS] |
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Answer» Which natural resource was used as a fuel for steam rails? Explain its characteristics. [3 MARKS] |
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| 29. |
30. Locate the venture of mass of arrangement shown in figure the road are identical in mass and length 1) L/2, L/2 2)L/3, 0 3)L/3, L/2 4)0, L/3 |
| Answer» 30. Locate the venture of mass of arrangement shown in figure the road are identical in mass and length 1) L/2, L/2 2)L/3, 0 3)L/3, L/2 4)0, L/3 | |
| 30. |
The stars appear higher in the sky than they actually are, due to : (a) diffraction of light (b) scattering of light (c) refraction of light (d) reflection of light |
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Answer» The stars appear higher in the sky than they actually are, due to : (a) diffraction of light (b) scattering of light (c) refraction of light (d) reflection of light |
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| 31. |
why voltameter has high resis†an ce while ammeter have low resis†an ce |
| Answer» why voltameter has high resis†an ce while ammeter have low resis†an ce | |
| 32. |
how to calculate the shielding effect |
| Answer» how to calculate the shielding effect | |
| 33. |
Consider a solid sphere of radius r and mass m which has a charge q distributed uniformly over it's volume. The sphere is rotated about diameter with an angular speed omega . Give the relation between magnetic moment and the angular momentum of sphere. |
| Answer» Consider a solid sphere of radius r and mass m which has a charge q distributed uniformly over it's volume. The sphere is rotated about diameter with an angular speed omega . Give the relation between magnetic moment and the angular momentum of sphere. | |
| 34. |
Find the least count of a milliammeter in which there are 20 divisions between 400 mA and 500 mA marks. |
| Answer» Find the least count of a milliammeter in which there are 20 divisions between 400 mA and 500 mA marks. | |
| 35. |
Which type of motion do the wheels of a moving car exhibit? |
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Answer» Which type of motion do the wheels of a moving car exhibit? |
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| 36. |
What type of energy is possessed by flowing water? |
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Answer» What type of energy is possessed by flowing water? |
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| 37. |
An electric kettle is rated '2.5 kW, 250 V'. Find the cost of running the kettle for two hours at Rs. 5.40 per unit. |
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Answer» An electric kettle is rated '2.5 kW, 250 V'. Find the cost of running the kettle for two hours at Rs. 5.40 per unit. |
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| 38. |
{ Two wires }AO and }OC carry equal }} currents i as shown in figure. One end } of both the wires extends to infinity. }{ Angle AOC is }α . The magnitude of }}{ magnetic field at point }P on the bisector }} of these two wires at a distance r from } point O is |
| Answer» { Two wires }AO and }OC carry equal }} currents i as shown in figure. One end } of both the wires extends to infinity. }{ Angle AOC is }α . The magnitude of }}{ magnetic field at point }P on the bisector }} of these two wires at a distance r from } point O is | |
| 39. |
THE VALUE OF -2^-5 DIVIDED BY 2^-3MULTIPLY 3^7BY 3^-6MULTIPLY2^-5 |
| Answer» THE VALUE OF -2^-5 DIVIDED BY 2^-3MULTIPLY 3^7BY 3^-6MULTIPLY2^-5 | |
| 40. |
Find the displacement of the wedge when the mass 'm' has comes out of the wedge. There is no friction anywhere. |
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Answer» Find the displacement of the wedge when the mass 'm' has comes out of the wedge. There is no friction anywhere. |
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| 41. |
Define:(1) 1 volt PD(2) 1 ampere(3) 1 ohm(4) Potential(5) Resistivity(6) Electric power |
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Answer» Define: (1) 1 volt PD (2) 1 ampere (3) 1 ohm (4) Potential (5) Resistivity (6) Electric power |
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| 42. |
The activity of a radioactive element reduces to 116 of its original value in 36 years. The half life of the element is |
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Answer» The activity of a radioactive element reduces to 116 of its original value in 36 years. The half life of the element is |
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| 43. |
A vertical wall in north and south direction. a current carrying wire is kept in the wall such that to the west kept in the wall magnetic field is towards south. then how should the wire be placed |
| Answer» A vertical wall in north and south direction. a current carrying wire is kept in the wall such that to the west kept in the wall magnetic field is towards south. then how should the wire be placed | |
| 44. |
A line source of sound of length10m emitting a pulse of sound thattravels radially outward from the source .The power of the source is P=10^4W. Find what is the approximated intensity I of the sound when it reaches a dis†an ce of 10m from the |
| Answer» A line source of sound of length10m emitting a pulse of sound thattravels radially outward from the source .The power of the source is P=10^4W. Find what is the approximated intensity I of the sound when it reaches a dis†an ce of 10m from the | |
| 45. |
The law of reflection, angle of incidence = angle of reflection can be deduced by which principle? |
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Answer» The law of reflection, angle of incidence = angle of reflection can be deduced by which principle? |
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| 46. |
Is it impossible to photograph a virtual image? Why? |
| Answer» Is it impossible to photograph a virtual image? Why? | |
| 47. |
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is(a) Clockwise(b) Zero(c) Counter clockwise(d) In a direction that depends on the ratio of the loop radii |
| Answer» Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is(a) Clockwise(b) Zero(c) Counter clockwise(d) In a direction that depends on the ratio of the loop radii | |
| 48. |
If the given figure is the image of the retina then in which region are the rods and cones cells distributed? |
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Answer» If the given figure is the image of the retina then in which region are the rods and cones cells distributed?
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| 49. |
The focal length of convex lens A is 15 cm and B is 20 cm and are placed at 5 cm apart. Rays from an object at infinity falls on lens A. Find the magnitude of image distance from lens A. |
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Answer» The focal length of convex lens A is 15 cm and B is 20 cm and are placed at 5 cm apart. Rays from an object at infinity falls on lens A. Find the magnitude of image distance from lens A. |
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| 50. |
Two metal spheres of same mass are suspended from a common point by two light insulating strings. The length of each string is same. The spheres are given charges +q and +4q as shown. Which of the following diagrams best shows the resulting positions of spheres? |
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Answer» Two metal spheres of same mass are suspended from a common point by two light insulating strings. The length of each string is same. The spheres are given charges +q and +4q as shown. Which of the following diagrams best shows the resulting positions of spheres? |
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