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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. |
Three heater coils h1, h2, h3, rated ( 1000W,100V) (1500W, 100V ) ( 2000W, 100V,) individually take a time interval of 12 min, 6 min, 4 min, respectively to generate the same quantity of heatQ when connected to a 200 V source. Noe these three coils are connected in parallel and this parallel combination is connected to a 50 V source. The time taken by this parallel combination of colis to generate the same quantity of heat Q is |
| Answer» Three heater coils h1, h2, h3, rated ( 1000W,100V) (1500W, 100V ) ( 2000W, 100V,) individually take a time interval of 12 min, 6 min, 4 min, respectively to generate the same quantity of heatQ when connected to a 200 V source. Noe these three coils are connected in parallel and this parallel combination is connected to a 50 V source. The time taken by this parallel combination of colis to generate the same quantity of heat Q is | |
| 2. |
Which of the following is used to check whether a body is charged or not? |
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Answer» Which of the following is used to check whether a body is charged or not? |
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| 3. |
Name the following diagrams and explain the concept behind them. |
Answer» Name the following diagrams and explain the concept behind them.
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| 4. |
Deutron and alpha partilcleare placedin an electric fieldtheforce acting on them are F1F2 and the acceleration are a1and a2 resp. then? 1. F1=F2 2.F1>F2 3. a1=a2 4. a1 not equls to a |
| Answer» Deutron and alpha partilcleare placedin an electric fieldtheforce acting on them are F1F2 and the acceleration are a1and a2 resp. then? 1. F1=F2 2.F1>F2 3. a1=a2 4. a1 not equls to a | |
| 5. |
what will be the increment in heat energy radiated when the temp of hot body is raised by 5% |
| Answer» what will be the increment in heat energy radiated when the temp of hot body is raised by 5% | |
| 6. |
Name the device used these days in place of electric fuses in electrical circuits. |
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Answer» Name the device used these days in place of electric fuses in electrical circuits. |
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| 7. |
The wire which is connected to the earth and has a black insulation cover is called as: |
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Answer» The wire which is connected to the earth and has a black insulation cover is called as: |
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| 8. |
Isotopes differ in___. |
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Answer» Isotopes differ in___. |
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| 9. |
Study the given ray diagrams and select the correct statement from the following : (a) Device X is a concave mirror and device Y is a convex lens, whose focal lengths are 20 cm and 25 cm respectively. (b) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 10 cm and 25 cm respectively. (c) Device X is a concave lens and device Y is a convex mirror, whose focal lengths are 20 cm and 25 cm respectively. (d) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively. |
Answer» Study the given ray diagrams and select the correct statement from the following : (a) Device X is a concave mirror and device Y is a convex lens, whose focal lengths are 20 cm and 25 cm respectively. (b) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 10 cm and 25 cm respectively. (c) Device X is a concave lens and device Y is a convex mirror, whose focal lengths are 20 cm and 25 cm respectively. (d) Device X is a convex lens and device Y is a concave mirror, whose focal lengths are 20 cm and 25 cm respectively. |
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| 10. |
A machine has a velocity ratio of 4. It is used to raise a load of 200 N by 4 m using an effort 20 kgf. Find the work done on the machine. Take g = 10 m/s2 . |
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Answer» A machine has a velocity ratio of 4. It is used to raise a load of 200 N by 4 m using an effort 20 kgf. Find the work done on the machine. Take g = 10 m/s2 . |
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| 11. |
One joule is defined as the work done in |
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Answer» One joule is defined as the work done in |
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| 12. |
An image formed by a plane mirror is of the same color as the object. True or false? |
| Answer» An image formed by a plane mirror is of the same color as the object. True or false? | |
| 13. |
What is meant by ocean thermal energy ? Explain how ocean thermal energy can be used to generate electricity ? |
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Answer» What is meant by ocean thermal energy ? Explain how ocean thermal energy can be used to generate electricity ? |
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| 14. |
The given figure shows an electromagnet What will be the polarity at the end X |
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Answer» The given figure shows an electromagnet
What will be the polarity at the end X |
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| 15. |
Usually three insulated wires of different colours ar used in an electrical appliance. Name the three colours |
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Answer» Usually three insulated wires of different colours ar used in an electrical appliance. Name the three colours |
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| 16. |
Why is the electric power from the generating station transmitted at a high voltage? |
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Answer» Why is the electric power from the generating station transmitted at a high voltage? |
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| 17. |
1.Figure shows the path of an electron in a region of uniform magnetic field . The path consists of two straight sections each between a pair of unifrmly charged plates and two half circles.Option are 1) plate 1 of pair A is at lower potential than plate2 of same pair 2) plate 1 of pair B is at lower potential than plate 2 of same pair 3) direction of the magnetic field is into the page 4 4)plate 1 of pair A is at hogher potential than plate 2 of the same pair |
| Answer» 1.Figure shows the path of an electron in a region of uniform magnetic field . The path consists of two straight sections each between a pair of unifrmly charged plates and two half circles.Option are 1) plate 1 of pair A is at lower potential than plate2 of same pair 2) plate 1 of pair B is at lower potential than plate 2 of same pair 3) direction of the magnetic field is into the page 4 4)plate 1 of pair A is at hogher potential than plate 2 of the same pair | |
| 18. |
The Laplace transform of the function sin22t is |
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Answer» The Laplace transform of the function sin22t is |
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| 19. |
Prove that in series combination of electric appliances, the reciprocal of total power consumption is equal to the sum of the reciprocals of the powers of individual appliances |
| Answer» Prove that in series combination of electric appliances, the reciprocal of total power consumption is equal to the sum of the reciprocals of the powers of individual appliances | |
| 20. |
The boiling point of a liquid____by the addition of impurities to it. |
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Answer» The boiling point of a liquid____by the addition of impurities to it. |
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| 21. |
Study the following scenarios and identify what type of inertia tends to resist the change. 1. When the bus suddenly starts, the passenger on the bus tends to fall backwards. 2. When a passenger jumps out of moving bus, he falls down. 3. A cyclist riding on a level road does not come to rest immediately even he stops pedalling. |
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Answer» Study the following scenarios and identify what type of inertia tends to resist the change. 1. When the bus suddenly starts, the passenger on the bus tends to fall backwards. 2. When a passenger jumps out of moving bus, he falls down. 3. A cyclist riding on a level road does not come to rest immediately even he stops pedalling. |
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| 22. |
Which property of light does not change when it enters from rarer medium to denser medium. Why? |
| Answer» Which property of light does not change when it enters from rarer medium to denser medium. Why? | |
| 23. |
The atomic numbers of Al, Na and Be respectively are: |
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Answer» The atomic numbers of Al, Na and Be respectively are: |
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| 24. |
1.Why g is maximum at earth's surface |
| Answer» 1.Why g is maximum at earth's surface | |
| 25. |
Hiw does heating reduces a compound? |
| Answer» Hiw does heating reduces a compound? | |
| 26. |
Four students A, B, C and D performed an experiment to determine the focal length of a convex lens by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams:Which diagram describes the correct position of image of the candle?(1) A(2) B(3) C(4) D |
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Answer» Four students A, B, C and D performed an experiment to determine the focal length of a convex lens by using a lighted candle kept at a considerable distance as the object. They represented the position of image by drawing the following diagrams:  Which diagram describes the correct position of image of the candle? (1) A (2) B (3) C (4) D |
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| 27. |
A student connects a coil of insulated wire to a galvanometer. What would be seen if a bar magnet with its north pole towards one face of the coil is:(a) moved quickly towards it?(b) moved quickly away from the coil?(c) placed near the face of the coil?Name the phenomenon involved. |
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Answer» A student connects a coil of insulated wire to a galvanometer. What would be seen if a bar magnet with its north pole towards one face of the coil is: (a) moved quickly towards it? (b) moved quickly away from the coil? (c) placed near the face of the coil? Name the phenomenon involved. |
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| 28. |
The radiations present in sunlight which make a solar cooker work are : (a) visible light rays (b) ultraviolet rays (c) cosmic rays (d) infrared rays |
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Answer» The radiations present in sunlight which make a solar cooker work are : |
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| 29. |
an isolated particle of mass m moving in horizontal plane [x-y] along the x axis at a certain height above the ground . it suddenly explodes into fragments of masses m/4 and 3m/4 . an instant later smaller fragment is at y=+15 cm . the larger fragment at this instant is at |
| Answer» an isolated particle of mass m moving in horizontal plane [x-y] along the x axis at a certain height above the ground . it suddenly explodes into fragments of masses m/4 and 3m/4 . an instant later smaller fragment is at y=+15 cm . the larger fragment at this instant is at | |
| 30. |
The potential energy of an energy of an object of mass m moving in my plane in a conservative Field is given by U=ax+by,where x and y are position coordinates of an object. Find magnitude of its acceleration |
| Answer» The potential energy of an energy of an object of mass m moving in my plane in a conservative Field is given by U=ax+by,where x and y are position coordinates of an object. Find magnitude of its acceleration | |
| 31. |
Harish rolled a small steel ball from one edge of the glass bowl as shown. Consider that there is no friction between the surface of the ball and the bowl, what will happen? |
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Answer» Harish rolled a small steel ball from one edge of the glass bowl as shown. Consider that there is no friction between the surface of the ball and the bowl, what will happen? |
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| 32. |
The radius of curvature of the face of a plano-convex lens silvered from the plane surface is 12cm and its refractive index is 1.5. At what distance from the lens the parallel rays incident on the convex face will converge? |
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Answer» The radius of curvature of the face of a plano-convex lens silvered from the plane surface is 12cm and its refractive index is 1.5. At what distance from the lens the parallel rays incident on the convex face will converge? |
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| 33. |
10. The ratio of the energy required to raise a satellite elupto a height h above the earth of radius R to thatthe kinetic energy of the satellite into that orbit is |
| Answer» 10. The ratio of the energy required to raise a satellite elupto a height h above the earth of radius R to thatthe kinetic energy of the satellite into that orbit is | |
| 34. |
A wire of a given material having length l and area of cross-sectional A has a resistance of 4 Ω. What would be the resistance of another wire of the same material having length l2 and area of cross-section 2A? |
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Answer» A wire of a given material having length l and area of cross-sectional A has a resistance of 4 Ω. What would be the resistance of another wire of the same material having length l2 and area of cross-section 2A? |
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| 35. |
the energy required to charge a parallel plate capacitor of plate seperatio d and plate area of cross section A such that unform electric field b/w thee plate E,i |
| Answer» the energy required to charge a parallel plate capacitor of plate seperatio d and plate area of cross section A such that unform electric field b/w thee plate E,i | |
| 36. |
if the angle of a triangular prism is A and the refractive index of the material is u , then under what conditions will there will be no emergent ray (in terms of A and u)1. A =2sin-(1/u)2 A 2sin-(1/u)4. sin-(1/u)< A <2sin-(1/u) |
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Answer» if the angle of a triangular prism is A and the refractive index of the material is u , then under what conditions will there will be no emergent ray (in terms of A and u) 1. A =2sin-(1/u) 2 A 4. sin-(1/u)< A <2sin-(1/u) |
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| 37. |
A body weights 50g in air and 40g in water .How much woukd it weigh in a liqyud of specifuc gravity 1.5 |
| Answer» A body weights 50g in air and 40g in water .How much woukd it weigh in a liqyud of specifuc gravity 1.5 | |
| 38. |
What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 kmhr−1 to 20 kmhr−1? |
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Answer» What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 kmhr−1 to 20 kmhr−1? |
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| 39. |
Is refractive index and optical density the same? |
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Answer» Is refractive index and optical density the same? |
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| 40. |
What is the difference between cathode ray and anode Ray |
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Answer» What is the difference between cathode ray and anode Ray |
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| 41. |
In the given diagram of a DC motor, the direction of flow of electrons in the left arm is: |
Answer» In the given diagram of a DC motor, the direction of flow of electrons in the left arm is: |
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| 42. |
7.A string wrapped on a pulley of moment of inertiaT. Other end of the string is connected to block ofmass 'm' as shown. If 'm' is released from restthen kinetic energy of block when it descends by'h', is14m(1) mgh(2) Greater than mghmgh(4)2(3) Less than mgh |
| Answer» 7.A string wrapped on a pulley of moment of inertiaT. Other end of the string is connected to block ofmass 'm' as shown. If 'm' is released from restthen kinetic energy of block when it descends by'h', is14m(1) mgh(2) Greater than mghmgh(4)2(3) Less than mgh | |
| 43. |
113.What is the equivalent resistance between A and B as shown in figure ? |
| Answer» 113.What is the equivalent resistance between A and B as shown in figure ? | |
| 44. |
66.Find the equivalent inductance of following circuit .if inductor has inductance L0. |
| Answer» 66.Find the equivalent inductance of following circuit .if inductor has inductance L0. | |
| 45. |
If the refractive index of the crown glass for red, yellow and violet colours are 1.514,1.517 and 1.531 respectively then, the dispersive power of the crown glass will be : |
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Answer» If the refractive index of the crown glass for red, yellow and violet colours are 1.514,1.517 and 1.531 respectively then, the dispersive power of the crown glass will be : |
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| 46. |
Two point charges q1=2μC and q2=1μC are placed at distances b=1 cm and a=2 cm from the origin of y and x axes as shown in figure. The electric field vector at point P(a,b) will subtend an angle (θ) with the x− axis given by tanθ=x. Find value of x (Give integer value) : |
Answer» Two point charges q1=2μC and q2=1μC are placed at distances b=1 cm and a=2 cm from the origin of y and x axes as shown in figure. The electric field vector at point P(a,b) will subtend an angle (θ) with the x− axis given by tanθ=x. Find value of x (Give integer value) : |
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| 47. |
Faraday's first law |
| Answer» Faraday's first law | |
| 48. |
The angle of incidence of a light ray on a rectangular glass slab is 45°. Which of the following cases correctly shows the path of the emergent ray? |
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Answer» The angle of incidence of a light ray on a rectangular glass slab is 45°. Which of the following cases correctly shows the path of the emergent ray? |
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| 49. |
Why centripetal acceleration is given by v²/r in non uniform circular motion though velocity is not constant? |
| Answer» Why centripetal acceleration is given by v²/r in non uniform circular motion though velocity is not constant? | |
| 50. |
An ideal gas heat engine operates in Carnot cycle between 227 C and 177 C. It absorbs 6*10^4 cals of heat at higher temperature. Amount of heat converted to work is |
| Answer» An ideal gas heat engine operates in Carnot cycle between 227 C and 177 C. It absorbs 6*10^4 cals of heat at higher temperature. Amount of heat converted to work is | |
