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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. |
Complete the following sentence: The current is induced in a closed circuit only if there is ....... |
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Answer» Complete the following sentence: The current is induced in a closed circuit only if there is ....... |
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| 2. |
19.The value of 120 joule per second on a system that has 10 g ,100cm ,1000 second as base unit is |
| Answer» 19.The value of 120 joule per second on a system that has 10 g ,100cm ,1000 second as base unit is | |
| 3. |
Question 1State the universal law of gravitation. |
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Answer» Question 1 |
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| 4. |
Two similar circular loops of radius R,are lying concentrically with their planes at right angles to each other .The current flowing in them are I and I 3 respectively . The magnetic field at the centre of the coil is |
| Answer» Two similar circular loops of radius R,are lying concentrically with their planes at right angles to each other .The current flowing in them are I and I 3 respectively . The magnetic field at the centre of the coil is | |
| 5. |
An object is placed at some distance in front of a concave mirror of focal length 10 cm. The image is formed on the same side, but 10 cm farther from the mirror than the object is. Find out the magnification of the mirror.-1.618 |
Answer» An object is placed at some distance in front of a concave mirror of focal length 10 cm. The image is formed on the same side, but 10 cm farther from the mirror than the object is. Find out the magnification of the mirror.
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| 6. |
1. Tick the right answeri. Where did the mother tiger and her small tiger cub live?a. near a riverb. near a mountainc. near a forestd. near a seaii. What did the mother tiger hunt when the sky was dark?a. sheep and goatsb. fish and frogsc. deer and pigsd. donkeys and horsesiii. What did the tiger cub catch one night?a. a deerb. a frogc. a pigd. a cat2. What happened to the little tiger cub when he chased the frog? |
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Answer» 1. Tick the right answer i. Where did the mother tiger and her small tiger cub live? a. near a river b. near a mountain c. near a forest d. near a sea ii. What did the mother tiger hunt when the sky was dark? a. sheep and goats b. fish and frogs c. deer and pigs d. donkeys and horses iii. What did the tiger cub catch one night? a. a deer b. a frog c. a pig d. a cat 2. What happened to the little tiger cub when he chased the frog? |
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| 7. |
best conductor of electricity? In metals |
| Answer» best conductor of electricity? In metals | |
| 8. |
A current carrying solenoid, acting as a short bar magnet, produces a magnetic field around it. The distance of a point P at its perpendicular bisector is R from its centre and another point A at its axis is situated at 4R from its centre. Then find the ratio of magnetic field at A to the magnetic field at P |
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Answer» A current carrying solenoid, acting as a short bar magnet, produces a magnetic field around it. The distance of a point P at its perpendicular bisector is R from its centre and another point A at its axis is situated at 4R from its centre. Then find the ratio of magnetic field at A to the magnetic field at P |
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| 9. |
In the given figure, the galvanometer will not have a deflection if: |
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Answer» In the given figure, the galvanometer will not have a deflection if: |
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| 10. |
The concept of the electromagnetic induction |
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Answer» The concept of the electromagnetic induction |
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| 11. |
A charge of 1 uc is given to one plate of a parallel plate capacitor of capacitance 0.1 μ F and a charge of 2is given to the other plate. Find the potential difference developed between the plates. |
| Answer» A charge of 1 uc is given to one plate of a parallel plate capacitor of capacitance 0.1 μ F and a charge of 2is given to the other plate. Find the potential difference developed between the plates. | |
| 12. |
In the following diagram, Terminal voltage of the cell is 100V and RA = 15 Ω and RB = 10Ω. Calculate the total current given out by the battery when the switch is i) Open and ii) Closed. |
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Answer» In the following diagram, Terminal voltage of the cell is 100V and RA = 15 Ω and RB = 10Ω. Calculate the total current given out by the battery when the switch is i) Open and ii) Closed.
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| 13. |
Which colour is strongly scattered by the molecules of air and other fine particles? |
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Answer» Which colour is strongly scattered by the molecules of air and other fine particles? |
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| 14. |
Can u plz explain different ways to induce current in coil |
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Answer» Can u plz explain different ways to induce current in coil |
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| 15. |
In the given mirror C - centre of the sphere to which the mirror is part of F - focus of the mirror P - pole of mirror A - point on mirror D - point on principal axis. If a ray of light starts from C and is incident on A from which point will the reflected ray pass through |
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Answer» In the given mirror C - centre of the sphere to which the mirror is part of F - focus of the mirror P - pole of mirror A - point on mirror D - point on principal axis.
If a ray of light starts from C and is incident on A from which point will the reflected ray pass through |
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| 16. |
1c charge is acquired by removing an electron and -1 by adding an electron then why -1c charge is not greater |
| Answer» 1c charge is acquired by removing an electron and -1 by adding an electron then why -1c charge is not greater | |
| 17. |
If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is:Charge on each electron is 1.6×10−19C |
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Answer» If one ampere of current flows through a conductor, then the number of electrons flowing across any cross-section of the conductor in 4 seconds is: |
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| 18. |
13. If (10 ki power x is equal to 64) what is the value of (10 ki power x upon 2 + 1) ? Options are -- a.18 b.42 c.80 d.81 |
| Answer» 13. If (10 ki power x is equal to 64) what is the value of (10 ki power x upon 2 + 1) ? Options are -- a.18 b.42 c.80 d.81 | |
| 19. |
Infinite number of masses, each of mass m, are placed along a straight line at distances r, 2r, 4r, 8r etc. from a reference point O. The gravitational field at O will be |
| Answer» Infinite number of masses, each of mass m, are placed along a straight line at distances r, 2r, 4r, 8r etc. from a reference point O. The gravitational field at O will be | |
| 20. |
A photon of energy hν and momentum hν/c collides with an electron at rest. After the collision, the scattered electron and the scattered photon each make an angle of 45∘ with the initial direction of motion. The ratio of frequency of scattered and incident photon is : (correct answer + 1, wrong answer - 0.25) |
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Answer» A photon of energy hν and momentum hν/c collides with an electron at rest. After the collision, the scattered electron and the scattered photon each make an angle of 45∘ with the initial direction of motion. The ratio of frequency of scattered and incident photon is : |
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| 21. |
What is the usefulness of latent heat of vaporization? |
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Answer» What is the usefulness of latent heat of vaporization? |
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| 22. |
What is the term used to describe a resource that will surely get exhausted with the passage of time? (3 words) __ |
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Answer» What is the term used to describe a resource that will surely get exhausted with the passage of time? (3 words) |
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| 23. |
29. Explanation of ohm's law? With its prove |
| Answer» 29. Explanation of ohm's law? With its prove | |
| 24. |
What is the cause of lateral of lateral inversion? Why is it that the image is flipped only horizontally but not vertically? |
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Answer» What is the cause of lateral of lateral inversion? Why is it that the image is flipped only horizontally but not vertically? |
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| 25. |
what force is applied by the body on the earth in counter to mg force (applied by earth on the body? whether mg is gravitational force? earth exerts normal reaction on the body whether body exerts normal reaction (in addition to mg) on earth? what will be the fbd of earth |
| Answer» what force is applied by the body on the earth in counter to mg force (applied by earth on the body? whether mg is gravitational force? earth exerts normal reaction on the body whether body exerts normal reaction (in addition to mg) on earth? what will be the fbd of earth | |
| 26. |
In an electric field electric potential V(x) only depends on X axis and V(x)=ax-bx^3 , where a,b are constant .Along X axis in which position electric intensity will be zero ? |
| Answer» In an electric field electric potential V(x) only depends on X axis and V(x)=ax-bx^3 , where a,b are constant .Along X axis in which position electric intensity will be zero ? | |
| 27. |
Which term describes development that is suitable at a long term level without causing depletion of resources? (2 words) __ |
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Answer» Which term describes development that is suitable at a long term level without causing depletion of resources? (2 words) |
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| 28. |
A light is incident at 74 degree on an equilateral prism and deviation angle of 55 is obtained. How much the angle ofincidence should be reduced so that same derivation angle is obtaine (1)33degree (2) 27degree (3)19degree (4)51de |
| Answer» A light is incident at 74 degree on an equilateral prism and deviation angle of 55 is obtained. How much the angle ofincidence should be reduced so that same derivation angle is obtaine (1)33degree (2) 27degree (3)19degree (4)51de | |
| 29. |
Multiple choice questions (i) Which of these statements is not a valid reason for the depletion of flora and fauna? (a) Agricultural expansion (b) Large scale developmental projects (c) Grazing and fuel wood collection (d) Rapid industrialisation and urbanisation (ii) Which of the following conservation strategies do not directly involve community participation? (a) Joint forest management (b) Beej Bachao Andolan (c) Chipko Movement (d) Demarcation of Wildlife sanctuaries |
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Answer» Multiple choice questions (i) Which of these statements is not a valid reason for the depletion of flora and fauna? (a) Agricultural expansion (b) Large scale developmental projects (c) Grazing and fuel wood collection (d) Rapid industrialisation and urbanisation (ii) Which of the following conservation strategies do not directly involve community participation? (a) Joint forest management (b) Beej Bachao Andolan (c) Chipko Movement (d) Demarcation of Wildlife sanctuaries |
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| 30. |
Question 16A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason. |
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Answer» Question 16 A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason. |
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| 31. |
UhMagnetic field produced due to the current flowing through the conductor wire is directly proportional to and inversely proportional to . a) length of wire ; electric current b) distance; electric current C) electric current; distance d) electric current; length of wire |
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Answer» UhMagnetic field produced due to the current flowing through the conductor wire is directly proportional to and inversely proportional to . a) length of wire ; electric current b) distance; electric current C) electric current; distance d) electric current; length of wire |
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| 32. |
Electra has trouble finding the correct Nernst equation for the cell Zn(s)|Zn2+||Cu2+|Cu(s) at 25∘C Can you help her? |
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Answer» Electra has trouble finding the correct Nernst equation for the cell Zn(s)|Zn2+||Cu2+|Cu(s) at 25∘C |
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| 33. |
The parallel rays from the top of a distant tree are incident on a concave mirror forming its image on a screen.The diagram which shows the image of the tree on the screen correctly is:(1) A(2) B(3) C(4) D |
Answer» The parallel rays from the top of a distant tree are incident on a concave mirror forming its image on a screen. The diagram which shows the image of the tree on the screen correctly is: (1) A (2) B (3) C (4) D |
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| 34. |
A concave lens of focal length 20cm and double convex lens of focal length 30cm are placed 15cm apart on their common axis if an object is placed at distance x in front of concave lens then value of x so that image is formed at infinity is |
| Answer» A concave lens of focal length 20cm and double convex lens of focal length 30cm are placed 15cm apart on their common axis if an object is placed at distance x in front of concave lens then value of x so that image is formed at infinity is | |
| 35. |
Power losses in transmission lines occur due to heating. This is calculated using the formula : ___ |
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Answer» Power losses in transmission lines occur due to heating. This is calculated using the formula : |
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| 36. |
Which form of energy is possessed by wind? |
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Answer» Which form of energy is possessed by wind? |
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| 37. |
What is the condition for a pair of lines ax2 + 2hxy + by2 + 2gx +2fy + c = 0 to be perpendicular to each other ? |
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Answer» What is the condition for a pair of lines ax2 + 2hxy + by2 + 2gx +2fy + c = 0 to be perpendicular to each other ? |
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| 38. |
If the object is at the focus of the concave mirror, the size of the image formed is |
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Answer» If the object is at the focus of the concave mirror, the size of the image formed is |
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| 39. |
ntIF V = vsin omega tn ntfind the average velocity over one half cycle?n |
| Answer» ntIF V = vsin omega tn ntfind the average velocity over one half cycle?n | |
| 40. |
A plane mirror is placed at the bottom of a tank containing a liquid of refractive index μ. P is a small object at a height h above the mirror. An observer O vertically above P above the liquid level sees P and its image in the mirror. The apparent distance between these two will be: |
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Answer» A plane mirror is placed at the bottom of a tank containing a liquid of refractive index μ. P is a small object at a height h above the mirror. An observer O vertically above P above the liquid level sees P and its image in the mirror. The apparent distance between these two will be: |
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| 41. |
25.A conducting square metal frame of frame of side L (< r) is placed inside solenoid such that its plane is perpendicular to the axis of solenoid. The solenoid have n turns per unit length. If a current I = Iosinwt flows through the solenoid, then find the magnitude of emf induced in frame. |
| Answer» 25.A conducting square metal frame of frame of side L (< r) is placed inside solenoid such that its plane is perpendicular to the axis of solenoid. The solenoid have n turns per unit length. If a current I = Iosinwt flows through the solenoid, then find the magnitude of emf induced in frame. | |
| 42. |
26.Water ( with refractive index 4/3) in a tank is 18 cm deep.Oil of refractive index 7/4 lies on water making a convex surface of radius of curvature R=6 cm.Consider Oil to act as a thin lens.An object Sender is placed 24 cm above water surface.The location of image is at x cm above the bottom of the tank.Then x is |
| Answer» 26.Water ( with refractive index 4/3) in a tank is 18 cm deep.Oil of refractive index 7/4 lies on water making a convex surface of radius of curvature R=6 cm.Consider Oil to act as a thin lens.An object Sender is placed 24 cm above water surface.The location of image is at x cm above the bottom of the tank.Then x is | |
| 43. |
(E)8.If an object is projected from surface of earth withspeed v 6gR , then interstellar speed of object(g= acceleration due to gravity at surface of earth,R Radius of earth)(1) 2gR(2) gR(3)2gR(4) 5gRi 110005 Ph 011-47623456 |
| Answer» (E)8.If an object is projected from surface of earth withspeed v 6gR , then interstellar speed of object(g= acceleration due to gravity at surface of earth,R Radius of earth)(1) 2gR(2) gR(3)2gR(4) 5gRi 110005 Ph 011-47623456 | |
| 44. |
70. A torch bulb is rated 6V and 750mA . Calculate the energy consumed by the bulb in 4 hours |
| Answer» 70. A torch bulb is rated 6V and 750mA . Calculate the energy consumed by the bulb in 4 hours | |
| 45. |
Two pillars of equal heights stand on either side of a road which is 100 m wide. At a point on the road between the pillars, the angles of elevation of the tops of the pillars are 60∘ and 30∘. Find the height of each pillar and position of the point on the road. [Take √3=1.732] [3 MARKS] |
| Answer» Two pillars of equal heights stand on either side of a road which is 100 m wide. At a point on the road between the pillars, the angles of elevation of the tops of the pillars are 60∘ and 30∘. Find the height of each pillar and position of the point on the road. [Take √3=1.732] [3 MARKS] | |
| 46. |
Two bodies A and B have masses in the ratio 9 : 4 and K.E in the ratio 36 : 25. Calculate ratio of their velocities. |
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Answer» Two bodies A and B have masses in the ratio 9 : 4 and K.E in the ratio 36 : 25. Calculate ratio of their velocities. |
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| 47. |
31.A capacitor of 2muf is charged as shown, when the switch S is turned to position 2, the percentage of its stored energy dissipated is |
| Answer» 31.A capacitor of 2muf is charged as shown, when the switch S is turned to position 2, the percentage of its stored energy dissipated is | |
| 48. |
(ofA water cooler of storage capacity 120 litres cancool water at a constant rate of P watts. In aclosed circulation system (as shown schematicallyin the figure), the water from the cooter is used tocool an external device that generates constantly3 KW of heat (thermal load). The temperature ofwater fed into the device cannot exceed 30^° C andthe entire stored 120 litres of water is initialycooled to 10^° C. the entire system is thermnsulated. The 'mivhich the device can be operated forinimum value of P (in watts) for3 hours is (specific heat of water is 4.2 kj/kg /k |
| Answer» (ofA water cooler of storage capacity 120 litres cancool water at a constant rate of P watts. In aclosed circulation system (as shown schematicallyin the figure), the water from the cooter is used tocool an external device that generates constantly3 KW of heat (thermal load). The temperature ofwater fed into the device cannot exceed 30^° C andthe entire stored 120 litres of water is initialycooled to 10^° C. the entire system is thermnsulated. The 'mivhich the device can be operated forinimum value of P (in watts) for3 hours is (specific heat of water is 4.2 kj/kg /k | |
| 49. |
What is the value of escape velocity of the Earth? |
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Answer» What is the value of escape velocity of the Earth? |
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| 50. |
prove that focal length of combination of two convex lens is always smaller than focal length of both lens. |
| Answer» prove that focal length of combination of two convex lens is always smaller than focal length of both lens. | |
