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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. |
The energy required for an appliance to run is 100 J s−1. What is the power consumed by it in W, if it operates at 220 V? |
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Answer» The energy required for an appliance to run is 100 J s−1. What is the power consumed by it in W, if it operates at 220 V? |
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| 2. |
The phenomenon of electromagnetic induction is(a) the process of charging a body(b) the process of generating magnetic field due to a current passing through a coil(c) producing induced current in a coil due to relative motion between a magnet and the coil(d) the process of rotating a coil of an electric motor |
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Answer» The phenomenon of electromagnetic induction is (a) the process of charging a body (b) the process of generating magnetic field due to a current passing through a coil (c) producing induced current in a coil due to relative motion between a magnet and the coil (d) the process of rotating a coil of an electric motor |
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| 3. |
68. The reduction potential of hydrogen electrode setup in water at 25 degree Celsius and partial pressure 1 ATM will be |
| Answer» 68. The reduction potential of hydrogen electrode setup in water at 25 degree Celsius and partial pressure 1 ATM will be | |
| 4. |
Ice is floating on water in a beaker when icecompletely melts then level of water in beaker (1 ) Increases (2) Decreases (3) Remains the same (4) First increases then decreases |
| Answer» Ice is floating on water in a beaker when icecompletely melts then level of water in beaker (1 ) Increases (2) Decreases (3) Remains the same (4) First increases then decreases | |
| 5. |
43.The position of point from wire B where net magnetic filed is zero due to following current distribution is :(b) |
| Answer» 43.The position of point from wire B where net magnetic filed is zero due to following current distribution is :(b) | |
| 6. |
Q 51/75 Calculate the weight of carbon which is burnt with excessof oxygen to form 22.4 L of CO2 at NTP |
| Answer» Q 51/75 Calculate the weight of carbon which is burnt with excessof oxygen to form 22.4 L of CO2 at NTP | |
| 7. |
In Activity 13.7 (page: 230), how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased: (ii) a stronger horse-shoe magnet is used: and (iii) length of the rod AB is increased? |
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Answer» In Activity 13.7 (page: 230), how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased: (ii) a stronger horse-shoe magnet is used: and (iii) length of the rod AB is increased? |
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| 8. |
A point is said to have a high potential when there is a higher deficiency of ___ at that point. |
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Answer» A point is said to have a high potential when there is a higher deficiency of ___ at that point. |
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| 9. |
three tuning forks of frequencies 200,203,and 207 Hz are sounded together.Find out the beat frequenc |
| Answer» three tuning forks of frequencies 200,203,and 207 Hz are sounded together.Find out the beat frequenc | |
| 10. |
Smith weighing 30 kg carries a load of 10 kg and travels a distance of 100 m in a straight line. Saloni weighing 40 kg goes up 100 m by climbing steps. The work done by Smith and Saloni of them respectively will be |
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Answer» Smith weighing 30 kg carries a load of 10 kg and travels a distance of 100 m in a straight line. Saloni weighing 40 kg goes up 100 m by climbing steps. The work done by Smith and Saloni of them respectively will be |
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| 11. |
What do you understand by thermalequilibrium? Give an example. |
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Answer» What do you understand by thermal equilibrium? Give an example. |
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| 12. |
Draw a diagram to show the magnetic field lines around a bar magnet. |
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Answer» Draw a diagram to show the magnetic field lines around a bar magnet. |
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| 13. |
Can we use the same fuse in a geyser and a television set? Explain. |
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Answer» Can we use the same fuse in a geyser and a television set? Explain. |
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| 14. |
DC motor works on the principle of ___ on a current carrying conductor due to magnetic field. |
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Answer» DC motor works on the principle of |
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| 15. |
What is the value of latent heat? |
| Answer» What is the value of latent heat? | |
| 16. |
Give some example of scattering of light that we come across in day-to-day life. |
| Answer» Give some example of scattering of light that we come across in day-to-day life. | |
| 17. |
Power voltage rating of an electric bulb is 100 W 200 V, current drawn by it will be? |
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Answer» Power voltage rating of an electric bulb is 100 W 200 V, current drawn by it will be? |
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| 18. |
116.What is Critical angle for Glass-Air interface if a Ray of Light which is incident in Air at Angle of Incidence 45^° on glass surface is Deviated through 15^° ? |
| Answer» 116.What is Critical angle for Glass-Air interface if a Ray of Light which is incident in Air at Angle of Incidence 45^° on glass surface is Deviated through 15^° ? | |
| 19. |
An 8 ohm resistance wire is cut into two parts of same length. Calculate the new resistance and resistivity? |
| Answer» An 8 ohm resistance wire is cut into two parts of same length. Calculate the new resistance and resistivity? | |
| 20. |
If one mole of carbon atoms weighsgrams. |
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Answer» If one mole of carbon atoms weighs |
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| 21. |
What is the name given to a cylindrical coil whose diameter is less in comparison to its length? |
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Answer» What is the name given to a cylindrical coil whose diameter is less in comparison to its length? |
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| 22. |
Question 11 Show how you would connect three resistors, each of resistance 6Ω, so that the combination has a resistance of(i) 9Ω? |
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Answer» Question 11 |
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| 23. |
Suppose you are inside the water in a swimming pool. Your friend is standing on the edge. Do you find your friend taller or shorter than his actual height? Why? |
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Answer» Suppose you are inside the water in a swimming pool. Your friend is standing on the edge. Do you find your friend taller or shorter than his actual height? Why? |
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| 24. |
Knowledge of Z helps us to calculate: |
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Answer» Knowledge of Z helps us to calculate: |
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| 25. |
13.When two conversing lenses of same focal length f are placed in contact , then the focal length of the combination is (1) f (2) 2f (3) f/2 (4) 3f |
| Answer» 13.When two conversing lenses of same focal length f are placed in contact , then the focal length of the combination is (1) f (2) 2f (3) f/2 (4) 3f | |
| 26. |
The specific conductivity of N/10 KCl solution at 20 degree Celsius is 0.0212 ohm^-1 cm^-1 and the resistance of the cell containing this solution at 20 degree Celsius is 55 ohm . The cell constant is |
| Answer» The specific conductivity of N/10 KCl solution at 20 degree Celsius is 0.0212 ohm^-1 cm^-1 and the resistance of the cell containing this solution at 20 degree Celsius is 55 ohm . The cell constant is | |
| 27. |
75. A coil of self inductance 50H is joined to the terminals of battery of emf 2V through a resistance of 10ohm and a steady current is flowing through the circuit.If the battery is now dissconnected then time in which the current will decay to 1/e of its steady value is |
| Answer» 75. A coil of self inductance 50H is joined to the terminals of battery of emf 2V through a resistance of 10ohm and a steady current is flowing through the circuit.If the battery is now dissconnected then time in which the current will decay to 1/e of its steady value is | |
| 28. |
a block of mass 5kg is at rest on a rough inclined surface. if angle of inclination of plane is 60 degree, then force applied by it on the block is |
| Answer» a block of mass 5kg is at rest on a rough inclined surface. if angle of inclination of plane is 60 degree, then force applied by it on the block is | |
| 29. |
The GMR of four symmetrically spaced sub conductors having radius 2 cm is ______ cm. 22.9 |
Answer» The GMR of four symmetrically spaced sub conductors having radius 2 cm is ______ cm. 
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| 30. |
An ideal transformer has 50 turns in its primary winding and 25 turns in its secondary winding. If the current in the secondary winding is 4 A, what will be the current in the primary winding, when a 200 V alternating voltage is applied across the primary? |
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Answer» An ideal transformer has 50 turns in its primary winding and 25 turns in its secondary winding. If the current in the secondary winding is 4 A, what will be the current in the primary winding, when a 200 V alternating voltage is applied across the primary? |
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| 31. |
Is strong nuclear force attractive/repulsive/attractive and repulsive? |
| Answer» Is strong nuclear force attractive/repulsive/attractive and repulsive? | |
| 32. |
Find the potential difference required to flow a current of 200 mA in a wire of resistance 20 Ω. |
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Answer» Find the potential difference required to flow a current of 200 mA in a wire of resistance 20 Ω. |
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| 33. |
A radioactive substance is oxidized. |
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Answer» A radioactive substance is oxidized. |
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| 34. |
A double concave thin lens made out of glass 1.5) have radii of curvature 500 cm. This lens is used to rectify the defect in vision of a person. The far point of the person will be at |
| Answer» A double concave thin lens made out of glass 1.5) have radii of curvature 500 cm. This lens is used to rectify the defect in vision of a person. The far point of the person will be at | |
| 35. |
Which of the following rays do not get deflected by an electric or magnetic field? |
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Answer» Which of the following rays do not get deflected by an electric or magnetic field? |
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| 36. |
If one mole of gas doubles its volume at temperature T isothermally then work done by the gas is |
| Answer» If one mole of gas doubles its volume at temperature T isothermally then work done by the gas is | |
| 37. |
Two electric bulbs, rated at (25 W,220 V) and (100 W,220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P1 and P2 respectively, then : |
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Answer» Two electric bulbs, rated at (25 W,220 V) and (100 W,220 V), are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs draw powers P1 and P2 respectively, then : |
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| 38. |
186 2 bar magnet of magnetic moment m and 3m fixed with perpendicular released inside the uniform magnetic field.if combined system produces SHM it's time period is T. If the 3m is removed find the new time period of SHM |
| Answer» 186 2 bar magnet of magnetic moment m and 3m fixed with perpendicular released inside the uniform magnetic field.if combined system produces SHM it's time period is T. If the 3m is removed find the new time period of SHM | |
| 39. |
A current i=1.5A is flowing through a long solenoid of diameter 3.2cm ’ having 220 turns per cm. At its centre; a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero and then increases again to 1.5A in reverse direction in 25ms. What is the magnitude of emf induced in the coil while the current in the coil is changing?? |
| Answer» A current i=1.5A is flowing through a long solenoid of diameter 3.2cm ’ having 220 turns per cm. At its centre; a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero and then increases again to 1.5A in reverse direction in 25ms. What is the magnitude of emf induced in the coil while the current in the coil is changing?? | |
| 40. |
A block whose mass is 500g is fastened to a spring . The spring has spring constant 100N/m . The block is pulled to a distance of x=10 cm from its equilibrium position state of x=0 from rest at t=0. What is kinetic energy of block at x=5cm? |
| Answer» A block whose mass is 500g is fastened to a spring . The spring has spring constant 100N/m . The block is pulled to a distance of x=10 cm from its equilibrium position state of x=0 from rest at t=0. What is kinetic energy of block at x=5cm? | |
| 41. |
Consider the following circuits:On plugging the key, the voltmeter/ammeter is likely to be damaged:(1) in circuit A(2) in circuit B(3) in circuit C(4) in circuit D |
Answer» Consider the following circuits: On plugging the key, the voltmeter/ammeter is likely to be damaged: (1) in circuit A (2) in circuit B (3) in circuit C (4) in circuit D |
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| 42. |
Convex lens of focal length 15 cm has an object kept at distance 45 cm from it. If height of object is 15 mm, determine position and height of image. |
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Answer» Convex lens of focal length 15 cm has an object kept at distance 45 cm from it. If height of object is 15 mm, determine position and height of image. |
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| 43. |
A rod of length L and cross-section area A lies along the x-axis between x = 0 and x = L. The material obeys Ohm's law and its resistivity varies along the rod according to ρ(x)=ρ0e−x/L. The total resistance of the rod is |
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Answer» A rod of length L and cross-section area A lies along the x-axis between x = 0 and x = L. The material obeys Ohm's law and its resistivity varies along the rod according to ρ(x)=ρ0e−x/L. The total resistance of the rod is |
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| 44. |
When light travels from rarer to denser medium,speed decreases, and when it comes out from denser medium speed increases...we know that if a body changes its speed or acceleration.. force needs to be applied...so which force makes it to speed up or slow down..while going through denser to rarer...which force acts on it to increase the speed??? |
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Answer» When light travels from rarer to denser medium,speed decreases, and when it comes out from denser medium speed increases...we know that if a body changes its speed or acceleration.. force needs to be applied...so which force makes it to speed up or slow down..while going through denser to rarer...which force acts on it to increase the speed??? |
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| 45. |
Why dv/dt = Velocity of image wrt to Lens? and Same for du/dt = Velocity of object wrt lens in case of image object velocity relation proof. |
| Answer» Why dv/dt = Velocity of image wrt to Lens? and Same for du/dt = Velocity of object wrt lens in case of image object velocity relation proof. | |
| 46. |
21. A current of 4A was passed for 1.5 hr through a solution of CuSO_4 with 3.2gm weight. Calculate the current efficiency |
| Answer» 21. A current of 4A was passed for 1.5 hr through a solution of CuSO_4 with 3.2gm weight. Calculate the current efficiency | |
| 47. |
What is meant by electric current? Name and define its S.I. unit |
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Answer» What is meant by electric current? Name and define its S.I. unit |
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| 48. |
By what other name is the unit joule/coulomb called? |
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Answer» By what other name is the unit joule/coulomb called? |
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| 49. |
77.the emf of a cell is 2v and its internal resistance is 2 ohm . resistance of a 8ohm is joined to battery in parallel this connected in in secondary circuit of potentiometer if 1v standard cell balances for 100 cm of potentiometer wire the balancing point of above cell |
| Answer» 77.the emf of a cell is 2v and its internal resistance is 2 ohm . resistance of a 8ohm is joined to battery in parallel this connected in in secondary circuit of potentiometer if 1v standard cell balances for 100 cm of potentiometer wire the balancing point of above cell | |
| 50. |
Which of the following can be produced during the nuclear fission as well as nuclear fusion reactions ? (a) protons (b) deutrons (c) electrons (d) neutrons |
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Answer» Which of the following can be produced during the nuclear fission as well as nuclear fusion reactions ? (a) protons (b) deutrons (c) electrons (d) neutrons |
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