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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. |
What do fossils tell us about the process of evolution? |
| Answer» What do fossils tell us about the process of evolution? | |
| 2. |
While discovering electrons, Thomson didn't notice anode rays which were positively charged.Why? |
| Answer» While discovering electrons, Thomson didn't notice anode rays which were positively charged.Why? | |
| 3. |
Question 2Electric current is to be passed from one body to another. For this purpose, the two bodies must be joined by(a) cotton thread(b) plastic string(c) copper wire(d) rubber band |
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Answer» Question 2 Electric current is to be passed from one body to another. For this purpose, the two bodies must be joined by |
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| 4. |
what is the difference between the direction of magnetic field and the direction of magnetic field lines |
| Answer» what is the difference between the direction of magnetic field and the direction of magnetic field lines | |
| 5. |
Question 13 A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate (i) the maximum height to which it rises. (ii) the total time it takes to return to the surface of the earth. |
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Answer» Question 13 A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate (i) the maximum height to which it rises. (ii) the total time it takes to return to the surface of the earth. |
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| 6. |
The current sensitivity of a moving coil galvanometer increases by 20% when its resistance is doubled. Calculate, by what factor does the voltage sensitivity change?(1) Becomes 3/5 times(2) Becomes 2/5 times(3) No change(4) Decreases by a factor of7/ |
| Answer» The current sensitivity of a moving coil galvanometer increases by 20% when its resistance is doubled. Calculate, by what factor does the voltage sensitivity change?(1) Becomes 3/5 times(2) Becomes 2/5 times(3) No change(4) Decreases by a factor of7/ | |
| 7. |
Heat energy flows from one body to another if there is a difference in ________ between the two bodies. |
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Answer» Heat energy flows from one body to another if there is a difference in ________ between the two bodies. |
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| 8. |
What is the work done by the moon when it revolves around the Earth |
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Answer» What is the work done by the moon when it revolves around the Earth |
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| 9. |
Convey 16 nA current to S.I Unit |
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Answer» Convey 16 nA current to S.I Unit |
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| 10. |
What are magnets? |
| Answer» What are magnets? | |
| 11. |
What are the ways by which the magnetic field of a solenoid can be made stronger? |
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Answer» What are the ways by which the magnetic field of a solenoid can be made stronger? |
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| 12. |
Examples of a simple harmonic motion : |
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Answer» Examples of a simple harmonic motion : |
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| 13. |
A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x−direction. At a particular point in space and time, →E=6.3 ^j Vm−1. The corresponding magnetic field →B, at that point will be: |
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Answer» A plane electromagnetic wave of frequency 50 MHz travels in free space along the positive x−direction. At a particular point in space and time, →E=6.3 ^j Vm−1. The corresponding magnetic field →B, at that point will be: |
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| 14. |
94. Prove that centre of mass of 2 particles divides a line joining the particle in the inverse ratio of their masses.Can center of mass of a body lie outside the body? |
| Answer» 94. Prove that centre of mass of 2 particles divides a line joining the particle in the inverse ratio of their masses.Can center of mass of a body lie outside the body? | |
| 15. |
Question 19 Groundwater will not be depleted due to (a) afforestation (b) thermal power plants (c) loss of forest and decreased rainfall (d) cropping of high water demanding crops |
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Answer» Question 19 |
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| 16. |
An electrochemical cell is to be made using Al electrode(E^°= 1.66V) and Cu electrode(E^°=0.34V). Which of these will be used as c athode and why? |
| Answer» An electrochemical cell is to be made using Al electrode(E^°= 1.66V) and Cu electrode(E^°=0.34V). Which of these will be used as c athode and why? | |
| 17. |
two blocks connected by inextensible string a force of 10 N is applied on the bigger block at 60 degree with horizontal then the tension in the string connecting the two masses is |
| Answer» two blocks connected by inextensible string a force of 10 N is applied on the bigger block at 60 degree with horizontal then the tension in the string connecting the two masses is | |
| 18. |
An ideal gas expands against a constant external pressure of 2 atm from 20l to 40l and absorbs 10kJ of heat from the surrounding what is the change in the internal energy of the system |
| Answer» An ideal gas expands against a constant external pressure of 2 atm from 20l to 40l and absorbs 10kJ of heat from the surrounding what is the change in the internal energy of the system | |
| 19. |
In a popular daredevil trick to complete a vertical loop on a motorcycle, the rider falls off the track because of the less speed before reaching the top of the loop. Determine the minimum speed necessary for a rider to successfully go around a vertical loop of the radius 15 meters. |
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Answer» In a popular daredevil trick to complete a vertical loop on a motorcycle, the rider falls off the track because of the less speed before reaching the top of the loop. Determine the minimum speed necessary for a rider to successfully go around a vertical loop of the radius 15 meters. |
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| 20. |
A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is λ (C/m), the electric field vector at y = – a on y-axis is |
| Answer» A very long thin charged rod is placed along x-axis with its midpoint at the origin. The charge per unit length of the rod is λ (C/m), the electric field vector at y = – a on y-axis is | |
| 21. |
The length of a conductor is increased to 36% of the original length , find the change percent in his restistance. |
| Answer» The length of a conductor is increased to 36% of the original length , find the change percent in his restistance. | |
| 22. |
What is the most fundamental property of a wave? |
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Answer» What is the most fundamental property of a wave?
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| 23. |
27. Number of atoms in 1ml of ammonia gas at STP is? |
| Answer» 27. Number of atoms in 1ml of ammonia gas at STP is? | |
| 24. |
Please exexpla how switch is a safety measure. |
| Answer» Please exexpla how switch is a safety measure. | |
| 25. |
A motor that pumps up water to a tank requires 10kW power. Its operating voltage is 220V. The only available resistor has a resistance of 11Ω. We know that we must use n such resistors in series and p such series resistor combinations in parallel. The values of n and p are respectively |
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Answer» A motor that pumps up water to a tank requires 10kW power. Its operating voltage is 220V. The only available resistor has a resistance of 11Ω. We know that we must use n such resistors in series and p such series resistor combinations in parallel. The values of n and p are respectively |
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| 26. |
Based on your reading of the passage say whether the following statements are True or False:(a) EVs have the potential to flourish in India(b) EVs degrade with time(c) EVs can create health hazards(d) EVs cannot drive fast because they have only two pedals(e) Solar power will not last for a very long time in our country(f) Establishing Solar Power generating units is too expensive |
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Answer» Based on your reading of the passage say whether the following statements are True or False: (a) EVs have the potential to flourish in India (b) EVs degrade with time (c) EVs can create health hazards (d) EVs cannot drive fast because they have only two pedals (e) Solar power will not last for a very long time in our country (f) Establishing Solar Power generating units is too expensive |
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| 27. |
How much work is required to carry a 6 μC charge from the negative terminal of a 9 V cell to the positive terminal? |
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Answer» How much work is required to carry a 6 μC charge from the negative terminal of a 9 V cell to the positive terminal? |
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| 28. |
100 g of water is heated from 30∘C to 50∘C. Ignoring the slight expansion of the water, the change in its internal energy is (in kJ) (specific heat of water is 4184 J/kg/K) |
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Answer» 100 g of water is heated from 30∘C to 50∘C. Ignoring the slight expansion of the water, the change in its internal energy is (in kJ) (specific heat of water is 4184 J/kg/K) |
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| 29. |
Why there are only two cases for the image formation by convex mirrors ? |
| Answer» Why there are only two cases for the image formation by convex mirrors ? | |
| 30. |
The highest refractive index is of : (a) Glass (b) Water (c) Diamond (d) Ruby. |
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Answer» The highest refractive index is of : (a) Glass (b) Water (c) Diamond (d) Ruby. |
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| 31. |
25.At what angle of incidence will the light reflected from glass of refractive index 1.5 be completely polarized? |
| Answer» 25.At what angle of incidence will the light reflected from glass of refractive index 1.5 be completely polarized? | |
| 32. |
The charge on a hole is considered as - |
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Answer» The charge on a hole is considered as - |
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| 33. |
Heat is supplied at constant pressure to a polyatomic gas . The fraction of heat which goes to work done by the gas |
| Answer» Heat is supplied at constant pressure to a polyatomic gas . The fraction of heat which goes to work done by the gas | |
| 34. |
The equal resistors connected in series across a source of emf together dissipate 5W of power. Of the same resistors are connected in parallel across the same source of emf , the power dissipated will be? |
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Answer» The equal resistors connected in series across a source of emf together dissipate 5W of power. Of the same resistors are connected in parallel across the same source of emf , the power dissipated will be? |
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| 35. |
The fission reaction of U235 takes place with the release of |
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Answer» The fission reaction of U235 takes place with the release of |
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| 36. |
Question 1State Fleming's left-hand rule. |
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Answer» Question 1 |
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| 37. |
{ Q. }36 > A series LCR circuit is connected to an ac source }}{ of voltage }V and angular frequency }ω . When only the capacitor }} is removed, the current lags behind the voltage by the phase }{ angle }φ and only inductor is removed, the current leads the }} voltage by the same phase angle. Find the current flowing and } the average power dissipated in LCR circuit. |
| Answer» { Q. }36 > A series LCR circuit is connected to an ac source }}{ of voltage }V and angular frequency }ω . When only the capacitor }} is removed, the current lags behind the voltage by the phase }{ angle }φ and only inductor is removed, the current leads the }} voltage by the same phase angle. Find the current flowing and } the average power dissipated in LCR circuit. | |
| 38. |
if the earth were suddenly contract to 1/nth of its present radius without any change in its mass,the duration of new day will be |
| Answer» if the earth were suddenly contract to 1/nth of its present radius without any change in its mass,the duration of new day will be | |
| 39. |
How many images of a person are formed who is in a room whose two adjacent walls and ceiling are plane mirror ?Option A) 4Option B) 5Option C) 6Option D) 7 |
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Answer» How many images of a person are formed who is in a room whose two adjacent walls and ceiling are plane mirror ? Option A) 4 Option B) 5 Option C) 6 Option D) 7 |
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| 40. |
46.Prove Angle I + angle r = angle a + angle d where a is angle of prism and d is angle of deviation |
| Answer» 46.Prove Angle I + angle r = angle a + angle d where a is angle of prism and d is angle of deviation | |
| 41. |
In the circuit shown below, the transistor has very large β. Some measurements have been made for this circuit . The results are indicated in the figure. The value of voltage V2 = ___V.-2 |
Answer» In the circuit shown below, the transistor has very large β. Some measurements have been made for this circuit . The results are indicated in the figure. The value of voltage V2 = ___V.
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| 42. |
Ionisation energy of He+ is 19.6×10-18J atom-1. The energy of the first stationary state(n=1) of Li2+is: |
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Answer» Ionisation energy of He+ is 19.6×10-18 |
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| 43. |
Name two parts of the eye which refract light rays (or bend light rays) . |
| Answer» Name two parts of the eye which refract light rays (or bend light rays) . | |
| 44. |
1. What is equivalent mass, gram equivalents and normality? |
| Answer» 1. What is equivalent mass, gram equivalents and normality? | |
| 45. |
Which one of the following is not renewable energy technology ? (a) solar cells (b) windmills (c) nuclear power (d) tidal power |
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Answer» Which one of the following is not renewable energy technology ? |
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| 46. |
Which causes the bulb to glow , gas or elecorons or something |
| Answer» Which causes the bulb to glow , gas or elecorons or something | |
| 47. |
45 The wavelength of limiting line of Lyman series in He+ ion would be |
| Answer» 45 The wavelength of limiting line of Lyman series in He+ ion would be | |
| 48. |
a wire of fixed length is wound on a solenoid of length l and radius r . its self inductance is found to be L . now if same wire is wound on a solenoid of length l/2 and radius r/2 , then self inductance will be |
| Answer» a wire of fixed length is wound on a solenoid of length l and radius r . its self inductance is found to be L . now if same wire is wound on a solenoid of length l/2 and radius r/2 , then self inductance will be | |
| 49. |
AN OBJECT IS IN A GLASS MEDIUM.THE REFRACTION TAKE PLACE AT THE CONCAVE BOUNDARY BETWEEN GLASS ANF AIR THE OBJECT DISTANCE IS GREATER THAN 5/2R FOR IMAGE TO BE REAL. THE REFRACTOVE INDEX OF GLASS |
| Answer» AN OBJECT IS IN A GLASS MEDIUM.THE REFRACTION TAKE PLACE AT THE CONCAVE BOUNDARY BETWEEN GLASS ANF AIR THE OBJECT DISTANCE IS GREATER THAN 5/2R FOR IMAGE TO BE REAL. THE REFRACTOVE INDEX OF GLASS | |
| 50. |
The sun delivers 10^3 W/m^2 of electromagnectic flux to earths surface.The total power that is incident on a roof of diamension 8m×20m will be? and radiation force on roof will be and solar energy incident on the roof in 1hour will |
| Answer» The sun delivers 10^3 W/m^2 of electromagnectic flux to earths surface.The total power that is incident on a roof of diamension 8m×20m will be? and radiation force on roof will be and solar energy incident on the roof in 1hour will | |