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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. |
Question 135 An electrons mass is approximately 9.1093826×10−31 kilograms. What is its mass in grams? |
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Answer» Question 135 An electrons mass is approximately 9.1093826×10−31 kilograms. What is its mass in grams? |
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| 2. |
A parallel beam of light is incident on a thin prism of angle 4π degree. Refractive index of prism is 1.5. A convex lens of focal length 60 cm is placed at distance of 80 cm from prism, then y-coordinate of point where light converges in cm is (Round the answer to two digits after the decimal point.) |
Answer»  A parallel beam of light is incident on a thin prism of angle 4π degree. Refractive index of prism is 1.5. A convex lens of focal length 60 cm is placed at distance of 80 cm from prism, then y-coordinate of point where light converges in cm is |
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| 3. |
A man stands 10 m in front of a large plane mirror. How far must he walk before he is 5 m away from his image ? |
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Answer» A man stands 10 m in front of a large plane mirror. How far must he walk before he is 5 m away from his image ? |
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| 4. |
Find the equivalent resistance betwen P and Q in the given circuit. |
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Answer» Find the equivalent resistance betwen P and Q in the given circuit. |
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| 5. |
If I keep the north pole of a bar magnet facing a conducting loop and move it towards the loop, I find a current flowing through it, let's say in the clockwise direction. If I want a current to flow in the counter-clockwise direction using the same bar magnet, I should |
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Answer» If I keep the north pole of a bar magnet facing a conducting loop and move it towards the loop, I find a current flowing through it, let's say in the clockwise direction. If I want a current to flow in the counter-clockwise direction using the same bar magnet, I should |
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| 6. |
A solenoid coil has 50 turns per cm along its lenght and a cross sectional area of 4cm^2. Now 200 turns of another wire are wounded round the first solenoid coaxially,the coils are electrically insulated from each other. calculate the mutual induc†an ce between the two coils. |
| Answer» A solenoid coil has 50 turns per cm along its lenght and a cross sectional area of 4cm^2. Now 200 turns of another wire are wounded round the first solenoid coaxially,the coils are electrically insulated from each other. calculate the mutual induc†an ce between the two coils. | |
| 7. |
A current I=1.5A going to a long solenoid of diameter 3.2 centimetre having 220 turns per centimetre. At its centre 130 turn closely coil of diameter 2.1 centimetre is placed such that the coil is coaxial with the long solenoid . the current in the solenoid is reduced to zero at a steady rate in 25ms. A) What is the magnitude of the EMF induced in the coil while the current in the solenoid is changing? B) Also find the EMF induced in the coil if it was positioned such that its plane contains the axis of the solenoid? C) what is the EMF induced when the current is reduced to zero and then increases again to 1.5 ampere in reverse direction in 25 ms? |
| Answer» A current I=1.5A going to a long solenoid of diameter 3.2 centimetre having 220 turns per centimetre. At its centre 130 turn closely coil of diameter 2.1 centimetre is placed such that the coil is coaxial with the long solenoid . the current in the solenoid is reduced to zero at a steady rate in 25ms. A) What is the magnitude of the EMF induced in the coil while the current in the solenoid is changing? B) Also find the EMF induced in the coil if it was positioned such that its plane contains the axis of the solenoid? C) what is the EMF induced when the current is reduced to zero and then increases again to 1.5 ampere in reverse direction in 25 ms? | |
| 8. |
While climbing a tower with 180 steps, a man rests after every 30 steps for 2minutes. How long did he rest before reaching the top? |
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Answer» While climbing a tower with 180 steps, a man rests after every 30 steps for 2minutes. How long did he rest before reaching the top? |
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| 9. |
find time in coils of heater connected in series and parallel explain properly |
| Answer» find time in coils of heater connected in series and parallel explain properly | |
| 10. |
110.A direct current of 4 ampere is superimposed on and alternating current of 40 coswt flowing through a wire. The root mean square current is? |
| Answer» 110.A direct current of 4 ampere is superimposed on and alternating current of 40 coswt flowing through a wire. The root mean square current is? | |
| 11. |
A body is acted upon by two forces each of magnitude F, but in opposite directions. State the effect of the forces if (a) both forces act at the same point of the body. (b) the two forces act at two different points of the body at a separation r. |
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Answer» A body is acted upon by two forces each of magnitude F, but in opposite directions. State the effect of the forces if (b) the two forces act at two different points of the body at a separation r. |
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| 12. |
The following images are of _________. |
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Answer» The following images are of _________. |
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| 13. |
A wire of resistance 10Ω is cut into 4 equal parts, keeping it's area the same, what will be the new resistance of each part? |
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Answer» A wire of resistance 10Ω is cut into 4 equal parts, keeping it's area the same, what will be the new resistance of each part? |
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| 14. |
Calculate the speed of light in a medium which has its refractive index as μ=1.5 |
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Answer» Calculate the speed of light in a medium which has its refractive index as μ=1.5 |
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| 15. |
Which of the following statements is true for a human eye? |
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Answer» Which of the following statements is true for a human eye? |
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| 16. |
how the value of g on earth depends on earth surfac |
| Answer» how the value of g on earth depends on earth surfac | |
| 17. |
The impedance of a circuit containing a resistance of 1ohm and an inductance of 0.1H in series,for a.c of 50Hz is approximately |
| Answer» The impedance of a circuit containing a resistance of 1ohm and an inductance of 0.1H in series,for a.c of 50Hz is approximately | |
| 18. |
145. If each resistor is 2 ohm. The potential difference across the capacitor is |
| Answer» 145. If each resistor is 2 ohm. The potential difference across the capacitor is | |
| 19. |
How do we see things upright if the image formed on retina in our eye is an inverted one. |
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Answer» How do we see things upright if the image formed on retina in our eye is an inverted one. |
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| 20. |
The average mass of an atom of uranium is 3.9*10 raised to the power -25kg. Find the no. Of atoms in 1 g of uranium? |
| Answer» The average mass of an atom of uranium is 3.9*10 raised to the power -25kg. Find the no. Of atoms in 1 g of uranium? | |
| 21. |
ntThe height from the surface of the Earth at which the acceleration due to gravity becomes g/9 , where g is the acceleration due to gravity on the surface of the Earth, in terms of radius of Earth R is?n nt(A) 2R (B) R/2 (C)R/2 (D) 2Rn |
| Answer» ntThe height from the surface of the Earth at which the acceleration due to gravity becomes g/9 , where g is the acceleration due to gravity on the surface of the Earth, in terms of radius of Earth R is?n nt(A) 2R (B) R/2 (C)R/2 (D) 2Rn | |
| 22. |
‘x’ in the diagram represents: |
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Answer» ‘x’ in the diagram represents:
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| 23. |
An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-rays in the spectrum, the variation of logλmin with log V is correctly represented in |
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Answer» An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-rays in the spectrum, the variation of logλmin with log V is correctly represented in |
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| 24. |
Dhruv has made an electric circuit as shown below, using a battery connected to an LED bulb and two electrodes dipped in the solution S. He quickly found out that the bulb is not glowing.Assuming that there are no broken wires and the circuit is closed, what could have been the error in this case? |
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Answer» Dhruv has made an electric circuit as shown below, using a battery connected to an LED bulb and two electrodes dipped in the solution S. He quickly found out that the bulb is not glowing. Assuming that there are no broken wires and the circuit is closed, what could have been the error in this case?  |
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| 25. |
What happen if I am go inside a black hole and what happens when you with time that I see.? |
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Answer» What happen if I am go inside a black hole and what happens when you with time that I see.? |
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| 26. |
The coefficient of velocity for an orifice is given by (using usual notations) |
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Answer» The coefficient of velocity for an orifice is given by (using usual notations) |
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| 27. |
rgA particle of charge 1 pC is at rest in a magnetic field B=-2kparticle with respect to an observer moving with velocity v -5i ms 1 will be(1) Zero(3) -10 6 j Ntesla. Magnetic Lorentz force on the cha(2) -10-5jN(4) +10-5jN |
| Answer» rgA particle of charge 1 pC is at rest in a magnetic field B=-2kparticle with respect to an observer moving with velocity v -5i ms 1 will be(1) Zero(3) -10 6 j Ntesla. Magnetic Lorentz force on the cha(2) -10-5jN(4) +10-5jN | |
| 28. |
The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index μ, of the prism is[Assume, surrounding medium to be air] |
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Answer» The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index μ, of the prism is |
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| 29. |
Two thin lenses of power +3.5 D and -2.5 D are placed in contact. Find the focal length of the lens combination. |
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Answer» Two thin lenses of power +3.5 D and -2.5 D are placed in contact. Find the focal length of the lens combination. |
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| 30. |
Difference between AC and DC? |
| Answer» Difference between AC and DC? | |
| 31. |
when potential difference of (25\pm1) V is applied accross a resistor the current throught is is (2.5\pm0.25) A.The resistor of the conductor is R=V/ |
| Answer» when potential difference of (25\pm1) V is applied accross a resistor the current throught is is (2.5\pm0.25) A.The resistor of the conductor is R=V/ | |
| 32. |
Determine the final result when 200 gm of water and 20 gm of ice at 0∘C are in a calorimeter having a water equivalent of 30 gm. 50 gm of steam is passed into it at 100∘C . Take latent heat of fusion 80 cal/gm and latent heat of vaporization as 540 cal/gm |
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Answer» Determine the final result when 200 gm of water and 20 gm of ice at 0∘C are in a calorimeter having a water equivalent of 30 gm. 50 gm of steam is passed into it at 100∘C . Take latent heat of fusion 80 cal/gm and latent heat of vaporization as 540 cal/gm |
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| 33. |
Define specific heat. |
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Answer» Define specific heat. |
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| 34. |
A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 ms1. The final velocity acquired by the person and the average force exerted on the person are |
| Answer» A person holding a rifle (mass of person and rifle together is 100 kg) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 ms1. The final velocity acquired by the person and the average force exerted on the person are | |
| 35. |
The wavelength of the particle is inversely proportional to the velocity of the particle. Then why d'Broglie's equation is not significant for the particles which have less speed |
| Answer» The wavelength of the particle is inversely proportional to the velocity of the particle. Then why d'Broglie's equation is not significant for the particles which have less speed | |
| 36. |
A fish is looking at a 1.0 m high plant at the edge of a pond. Will the plant appear to the fish shorter or taller than its actual height? Draw a ray diagram to support your answer. |
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Answer» A fish is looking at a 1.0 m high plant at the edge of a pond. Will the plant appear to the fish shorter or taller than its actual height? Draw a ray diagram to support your answer. |
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| 37. |
The number of unpaired electrons in carbon atom in excited state is _____A. 1B. 2C. 3D. 4 |
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Answer» The number of unpaired electrons in carbon atom in excited state is _____ A. 1 B. 2 C. 3 D. 4 |
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| 38. |
calculate number of electrons in Fe having n+ l+M=2 |
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Answer» calculate number of electrons in Fe having n+ l+M=2 |
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| 39. |
Transition between three energy levels in a particular atom gives rise to three spectral lines of wavelengths, in increasing magnitudes as λ1, λ2 and λ3. Which one of the following equations correctly relates λ1,λ2 and λ3? |
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Answer» Transition between three energy levels in a particular atom gives rise to three spectral lines of wavelengths, in increasing magnitudes as λ1, λ2 and λ3. Which one of the following equations correctly relates λ1,λ2 and λ3? |
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| 40. |
An electric bulb works on which of the following principles: |
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Answer» An electric bulb works on which of the following principles: |
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| 41. |
A boat of mass 80 kg is floating on still water. A dog ofmass 20kg on the boat is at a distance of 10m from the shore. The dog moves on the boat by a distance of 2m towards the shore. The distance of the dog from the shoreis now |
| Answer» A boat of mass 80 kg is floating on still water. A dog ofmass 20kg on the boat is at a distance of 10m from the shore. The dog moves on the boat by a distance of 2m towards the shore. The distance of the dog from the shoreis now | |
| 42. |
What is the coefficient of self inductance of a solenoid, when the magnetic flux through it is 2×10−2 Wb and the current in it is 0.01 A? |
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Answer» What is the coefficient of self inductance of a solenoid, when the magnetic flux through it is 2×10−2 Wb and the current in it is 0.01 A? |
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| 43. |
when a 30v battery is connected across an electric circuit for a minute,it consumes 4.5kj of energy.find the resistance. |
| Answer» when a 30v battery is connected across an electric circuit for a minute,it consumes 4.5kj of energy.find the resistance. | |
| 44. |
A conductor is connected across the source of 200 V and the current in the conductor is 5 amp. The length and area of cross section of the conductor is 10 meter and 1 mm2. Calculate the resistivity of the conductor. |
| Answer» A conductor is connected across the source of 200 V and the current in the conductor is 5 amp. The length and area of cross section of the conductor is 10 meter and 1 mm2. Calculate the resistivity of the conductor. | |
| 45. |
What is f centre |
| Answer» What is f centre | |
| 46. |
current in the diagram given below |
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Answer» current in the diagram given below |
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| 47. |
An object of height 6 cm is placed perpendicular to the principal axis of a concave lens of focal length 5 cm. Use lens formula to determine the position, size and nature of the image if the distance of the object from the lens is 10 cm. |
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Answer» An object of height 6 cm is placed perpendicular to the principal axis of a concave lens of focal length 5 cm. Use lens formula to determine the position, size and nature of the image if the distance of the object from the lens is 10 cm. |
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| 48. |
why does a silvered plano-convex lens behave as a concave mirror even though effective focal length comes out to be positive |
| Answer» why does a silvered plano-convex lens behave as a concave mirror even though effective focal length comes out to be positive | |
| 49. |
if J and E are current density and electric field respectively inside current carrying conductor,find correct relation.A-j= sigmaE,B- J× E,C-J.E>0 ,D-all of abo |
| Answer» if J and E are current density and electric field respectively inside current carrying conductor,find correct relation.A-j= sigmaE,B- J× E,C-J.E>0 ,D-all of abo | |
| 50. |
How is voltmeter connected in the circuit to measure potential difference between two points? |
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Answer» How is voltmeter connected in the circuit to measure potential difference between two points? |
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