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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. |
Name two factors on which the heat energy liberated by a body on cooling depends. |
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Answer» Name two factors on which the heat energy liberated by a body on cooling depends. |
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| 2. |
9. Assertion:Both methane and tetrachloride thane non polar Reason: C-Cl bond is polar bond. |
| Answer» 9. Assertion:Both methane and tetrachloride thane non polar Reason: C-Cl bond is polar bond. | |
| 3. |
A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is n and the cross-sectional area of the coil is A. When the coil turns through 180∘ about its diameter, the charge flowing through the coil is Q. The total resistance of the circuit is R. What is the magnitude of the magnetic induction |
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Answer» A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is n and the cross-sectional area of the coil is A. When the coil turns through 180∘ about its diameter, the charge flowing through the coil is Q. The total resistance of the circuit is R. What is the magnitude of the magnetic induction |
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| 4. |
Explain why the balloon attached to the bottle mouth inflates when the bottle is kept in the hot water as shown below. |
Answer» Explain why the balloon attached to the bottle mouth inflates when the bottle is kept in the hot water as shown below. |
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| 5. |
the focal length of a thin lens in vaccum is f. If the material of the lens has μ= 3/2, its focal length when immersed in water of refractive index 4/3 will b |
| Answer» the focal length of a thin lens in vaccum is f. If the material of the lens has μ= 3/2, its focal length when immersed in water of refractive index 4/3 will b | |
| 6. |
State the condition for a object to be in 1. stable equilibrium2. Unstable equilibrium3. neutral equilibrium |
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Answer» State the condition for a object to be in 1. stable equilibrium 2. Unstable equilibrium 3. neutral equilibrium |
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| 7. |
Decrease in potential energy of a ball of mass 20 kg which falls from a height of 50 cm isa) 968 Jb) 98 Jc) 1980 Jd) None of these |
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Answer» Decrease in potential energy of a ball of mass 20 kg which falls from a height of 50 cm is a) 968 J b) 98 J c) 1980 J d) None of these |
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| 8. |
Question 9 A battery of 9 V is connected in series with resistors of 0.2Ω,0.3Ω,0.4Ω,0.5Ω and 12Ω, respectively. How much current would flow through the 12Ω resistors? |
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Answer» Question 9 A battery of 9 V is connected in series with resistors of 0.2Ω,0.3Ω,0.4Ω,0.5Ω and 12Ω, respectively. How much current would flow through the 12Ω resistors? |
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| 9. |
An object of size 5 cm is kept at a distance of 25 cm from the optical centre of a converging lens of focal length 10 cm. Calculate the distance of image from the length and the size of the image? |
| Answer» An object of size 5 cm is kept at a distance of 25 cm from the optical centre of a converging lens of focal length 10 cm. Calculate the distance of image from the length and the size of the image? | |
| 10. |
2. Does the melting point of chlorides of group 2 metals decrease from BeCl2 to BaCl2? |
| Answer» 2. Does the melting point of chlorides of group 2 metals decrease from BeCl2 to BaCl2? | |
| 11. |
Find the potential difference between A and B (VA−VB) for the given circuit |
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Answer» Find the potential difference between A and B (VA−VB) for the given circuit |
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| 12. |
Calculate the frequency of an EM wave with a wavelength of 4000 A0. |
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Answer» Calculate the frequency of an EM wave with a wavelength of 4000 A0. |
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| 13. |
A rocket is fired from the earth's surface to the moon's surface. The distance between the centre's of earthand the moon is r and the mass of the earth is 81 times the mass of the moon. The gravitational force on the rocket will be zero, when its distance from the moon is |
| Answer» A rocket is fired from the earth's surface to the moon's surface. The distance between the centre's of earthand the moon is r and the mass of the earth is 81 times the mass of the moon. The gravitational force on the rocket will be zero, when its distance from the moon is | |
| 14. |
Give example of each class of lever in a human body. |
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Answer» Give example of each class of lever in a human body. |
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| 15. |
An ant is standing 20 cm from a concave lens. Its image is obtained at 10 cm from the lens on the same side. What is the power of the lens?-5 |
Answer» An ant is standing 20 cm from a concave lens. Its image is obtained at 10 cm from the lens on the same side. What is the power of the lens?
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| 16. |
The focal length of a convex lens is 20 cm. If an object is kept at a distance of 100 cm from the lens, find out the distance of the image formed from the lens. |
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Answer» The focal length of a convex lens is 20 cm. If an object is kept at a distance of 100 cm from the lens, find out the distance of the image formed from the lens. |
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| 17. |
A ball moving with a momentum of 15kgm/s, strikes against a wall at an angle of 30° and is deflected back with the same momentum at the same angle. Calculate the impulse. |
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Answer» A ball moving with a momentum of 15kgm/s, strikes against a wall at an angle of 30° and is deflected back with the same momentum at the same angle. Calculate the impulse. |
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| 18. |
11.The mutual inductance of two coils of radii a and b if the plane of coils are perpendicular to each other |
| Answer» 11.The mutual inductance of two coils of radii a and b if the plane of coils are perpendicular to each other | |
| 19. |
an achromatic convergent doublet of two lenses in contact has a power + 2 d the convex lens has a power + 5D the ratio of dispersive power of the convergent and divergent lense is |
| Answer» an achromatic convergent doublet of two lenses in contact has a power + 2 d the convex lens has a power + 5D the ratio of dispersive power of the convergent and divergent lense is | |
| 20. |
Three resistors are connected to a 12 V battery as shown in the figure given below: The current through the 8 ohm resistor is: |
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Answer» Three resistors are connected to a 12 V battery as shown in the figure given below:
The current through the 8 ohm resistor is: |
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| 21. |
78.The de-Broglie wavelength of an electron travelling with 10% of velocity of light is equal to 1) 242.4 pm 2) 24.2 pm 3) 2.42 pm 4) 0.2424 pm Q2) the number of photons of light of wavelength 7000A equivalent to 1 J are 1)3.52×10 -18 2) 3.52×10 18 3) 50000 4) 100000 |
| Answer» 78.The de-Broglie wavelength of an electron travelling with 10% of velocity of light is equal to 1) 242.4 pm 2) 24.2 pm 3) 2.42 pm 4) 0.2424 pm Q2) the number of photons of light of wavelength 7000A equivalent to 1 J are 1)3.52×10 -18 2) 3.52×10 18 3) 50000 4) 100000 | |
| 22. |
The main circuit board in the computer system unit is called __________. |
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Answer» The main circuit board in the computer system unit is called __________. |
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| 23. |
Name the spherical mirror which can produce a real and diminished image of an object. |
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Answer» Name the spherical mirror which can produce a real and diminished image of an object. |
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| 24. |
ntA proton is fixed at origin.Another proton is released from rest, from a point at distance r, from origin.Taking charge of portion as e and mass as m , find the speed of the protonn nt1)at a distance 2r from originn nt2) a large distance from the origin.n |
| Answer» ntA proton is fixed at origin.Another proton is released from rest, from a point at distance r, from origin.Taking charge of portion as e and mass as m , find the speed of the protonn nt1)at a distance 2r from originn nt2) a large distance from the origin.n | |
| 25. |
The value of m if 2y3 + my2 + 11y + m + 3 is exactly divisible by 2y - 1 is ________ |
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Answer» The value of m if 2y3 + my2 + 11y + m + 3 is exactly divisible by 2y - 1 is ________ |
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| 26. |
A radioactive nucleus decays according to the following reaction.Xα→ X1β−−→X2α→X3γ→X4If Z=72 A=180 for the element X, the mass number and atomic number of X4 will be, respectively, |
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Answer» A radioactive nucleus decays according to the following reaction. |
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| 27. |
why are the sign convention of positive and negative terminal used in chemistry and physics opposite for electrochemical cell |
| Answer» why are the sign convention of positive and negative terminal used in chemistry and physics opposite for electrochemical cell | |
| 28. |
The LPG used for cooking consists of mainly two gases, Propane and Butane in the ratio- |
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Answer» The LPG used for cooking consists of mainly two gases, Propane and Butane in the ratio- |
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| 29. |
nttwo loops are concentric and current flows in clockwise direction in outer loop and increases with time. what is direction of current in inner loopn ntn |
| Answer» nttwo loops are concentric and current flows in clockwise direction in outer loop and increases with time. what is direction of current in inner loopn ntn | |
| 30. |
Why are the danger signals coloured red? |
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Answer» Why are the danger signals coloured red? |
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| 31. |
If VA and VB denote the potentials of<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->A and B, then the equivalent resistance between <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->A and B in the given electric circuit is - |
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Answer» If VA and VB denote the potentials of |
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| 32. |
In the experiment to trace the path of a ray of light through a parallel sided glass slab, a student measured the angles of refraction for three different angles of incidence. He will find that:(1) angle of refraction is always equal to the angle of incidence(2) angle of refraction is always smaller than the angle of incidence(3) angle of refraction is always greater than the angle of incidence(4) angle of refraction can be smaller or greater than the angle of incidence depending on the refractive index of glass slab |
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Answer» In the experiment to trace the path of a ray of light through a parallel sided glass slab, a student measured the angles of refraction for three different angles of incidence. He will find that: (1) angle of refraction is always equal to the angle of incidence (2) angle of refraction is always smaller than the angle of incidence (3) angle of refraction is always greater than the angle of incidence (4) angle of refraction can be smaller or greater than the angle of incidence depending on the refractive index of glass slab |
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| 33. |
Two long thin charged rods with charge density λ each are placed parallel to each other at adistance d apart. The force per unit length exertedon one rod by the other will be where k=1/4π Eo |
| Answer» Two long thin charged rods with charge density λ each are placed parallel to each other at adistance d apart. The force per unit length exertedon one rod by the other will be where k=1/4π Eo | |
| 34. |
79 A solution of copper sulphate electrolysed for 20 minutes with a current of 1.5A . Calculate the mass of copper deposited at cathode?? |
| Answer» 79 A solution of copper sulphate electrolysed for 20 minutes with a current of 1.5A . Calculate the mass of copper deposited at cathode?? | |
| 35. |
A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. Find the ratio of the magnetic field at a/2 and 2a ? |
| Answer» A long straight wire of radius a carries a steady current I. The current is uniformly distributed across its cross-section. Find the ratio of the magnetic field at a/2 and 2a ? | |
| 36. |
As you go down in a well, your weight: |
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Answer» As you go down in a well, your weight: |
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| 37. |
A force acts on a 3 gm particle such that the position of the particle as a function of time is given by x=3t-4t^{2^{}}+t^3, where x is in metres and t is in seconds. The work done during the first 4 seconds in mJ is________ |
| Answer» A force acts on a 3 gm particle such that the position of the particle as a function of time is given by x=3t-4t^{2^{}}+t^3, where x is in metres and t is in seconds. The work done during the first 4 seconds in mJ is________ | |
| 38. |
A long horizontal wire ‘A’ is rigidly fixed and an another wire B’ which is placed directly below and parallel to wire ‘A’. Wire B’ remains suspended in air due to magnetic attraction. If direction of current is reversed in any one wire then due to gravity Instantaneous acceleration of free wire B’ (where g Is acceleration due to gravity)(1) g, in downward direction(2) g, In upward direction(3) 2g, in downward direction(4) 2g, in upward direction |
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Answer» A long horizontal wire ‘A’ is rigidly fixed and an another wire B’ which is placed directly below and parallel to wire ‘A’. Wire B’ remains suspended in air due to magnetic attraction. If direction of current is reversed in any one wire then due to gravity Instantaneous acceleration of free wire B’ (where g Is acceleration due to gravity) (1) g, in downward direction (2) g, In upward direction (3) 2g, in downward direction (4) 2g, in upward direction |
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| 39. |
In an electric cell while in use, the change in energy is from: (a) electrical to mechanical (b) electrical to chemical (c) chemical to mechanical (d) chemical to electrical |
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Answer» In an electric cell while in use, the change in energy is from: (a) electrical to mechanical (b) electrical to chemical (c) chemical to mechanical (d) chemical to electrical |
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| 40. |
Why are thermal power plants setup near oil fields? |
| Answer» Why are thermal power plants setup near oil fields? | |
| 41. |
The major problem in harnessing nuclear energy is how to: |
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Answer» The major problem in harnessing nuclear energy is how to: |
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| 42. |
is it possible to generate emf without rotating coil in ac generator |
| Answer» is it possible to generate emf without rotating coil in ac generator | |
| 43. |
In the vapour compression cycle shown in the figure, the evaporating and condensing temperature are 260 K and 310 K, respectively. the compressor takes in liquid-vapour mixture (state 1) and isentropically compresses it to a dry saturated vapour condition (state 2). the specific heat of the liquid refrigerant is 4.8 kJ/kg−K may be treated as constant. The enthalpy of evaporation for the refrigerator at 310 K is 1054 kJ/kg.The difference between the enthalpies at state points 1 and 0 (in kJ/kg) is |
Answer» In the vapour compression cycle shown in the figure, the evaporating and condensing temperature are 260 K and 310 K, respectively. the compressor takes in liquid-vapour mixture (state 1) and isentropically compresses it to a dry saturated vapour condition (state 2). the specific heat of the liquid refrigerant is 4.8 kJ/kg−K may be treated as constant. The enthalpy of evaporation for the refrigerator at 310 K is 1054 kJ/kg. The difference between the enthalpies at state points 1 and 0 (in kJ/kg) is |
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| 44. |
how to find charge on fe2 fe co zn |
| Answer» how to find charge on fe2 fe co zn | |
| 45. |
A ray of light is incident on a transparent glass slab of refractive index 1.62 from the air with refractive index 1. If the reflected and refracted rays are mutually perpendicular, what is the angle of incidence? |
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Answer» A ray of light is incident on a transparent glass slab of refractive index 1.62 from the air with refractive index 1. If the reflected and refracted rays are mutually perpendicular, what is the angle of incidence? |
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| 46. |
State the rules(1) Fleming’s right hand rule(2) Right hand thumb rule |
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Answer» State the rules (1) Fleming’s right hand rule (2) Right hand thumb rule |
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| 47. |
In Fleming’s right hand rule |
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Answer» In Fleming’s right hand rule |
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| 48. |
A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end close to the pole is 20 cm away from the mirror. The length of the image is |
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Answer» A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its end close to the pole is 20 cm away from the mirror. The length of the image is |
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| 49. |
If a bulb and the coil are connected in series with a DC source and iron core put in the coil then the glowing of bulb. 1 )decreases 2) increases 3 )no change 4)zero |
| Answer» If a bulb and the coil are connected in series with a DC source and iron core put in the coil then the glowing of bulb. 1 )decreases 2) increases 3 )no change 4)zero | |
| 50. |
What is the effective resistance between the points P and Q in the circuit shown below? |
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Answer» What is the effective resistance between the points P and Q in the circuit shown below? |
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