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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. |
61.A; centripetal and centrifugal forces never cancel each other R; they are action reaction forces explain in DETAIL |
| Answer» 61.A; centripetal and centrifugal forces never cancel each other R; they are action reaction forces explain in DETAIL | |
| 2. |
What is the water cycle? |
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Answer» What is the water cycle? |
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| 3. |
what is the energy level of an atom in molecular state |
| Answer» what is the energy level of an atom in molecular state | |
| 4. |
consider the statements related to circular motion in usual notations A.in uniform circular motion \xrightarrow[ω]{},\xrightarrow[v]{}and \xrightarrow[a]{} are always mutually perpendicular B.in non-uniform circular motion \xrightarrow[ω]{},\xrightarrow[v]{}and \xrightarrow[a]{} are always mutually perpendicular 1)both A and B are true 2)both A and B are false 3)A is true but B is false 4)A is false but B\:is true |
| Answer» consider the statements related to circular motion in usual notations A.in uniform circular motion \xrightarrow[ω]{},\xrightarrow[v]{}and \xrightarrow[a]{} are always mutually perpendicular B.in non-uniform circular motion \xrightarrow[ω]{},\xrightarrow[v]{}and \xrightarrow[a]{} are always mutually perpendicular 1)both A and B are true 2)both A and B are false 3)A is true but B is false 4)A is false but B\:is true | |
| 5. |
The switch shown in the circuit is closed at t=0. The current drawn from the battery by the circuit at t=0 and t=∞ are in the ratio of- |
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Answer» The switch shown in the circuit is closed at t=0. The current drawn from the battery by the circuit at t=0 and t=∞ are in the ratio of- |
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| 6. |
Is a mirror essential for us? |
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Answer»
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| 7. |
Can a concave lens form an image of size two times that of the object ? Give reason. |
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Answer» Can a concave lens form an image of size two times that of the object ? Give reason. |
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| 8. |
As seen from above, the apparent depth of a liquid in a vessel is 15 cm, when its real depth is 20 cm. Find the refractive index of the liquid. |
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Answer» As seen from above, the apparent depth of a liquid in a vessel is 15 cm, when its real depth is 20 cm. Find the refractive index of the liquid. |
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| 9. |
under what condition will a thin lens have magnification -1 |
| Answer» under what condition will a thin lens have magnification -1 | |
| 10. |
Is it anyways possible by ohm's law that current/potential difference = constant . Please explain. If not then what is the result of current / potential difference |
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Answer» Is it anyways possible by ohm's law that current/potential difference = constant . Please explain. If not then what is the result of current / potential difference |
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| 11. |
The values of two resistors are R1 = (6 ± 0.3) kΩ and R2 = (10 ± 0.2) kΩ. The percentage error in the equivalent resistance when they are connected in parallel is |
| Answer» The values of two resistors are R1 = (6 ± 0.3) kΩ and R2 = (10 ± 0.2) kΩ. The percentage error in the equivalent resistance when they are connected in parallel is | |
| 12. |
An object travels around a circle of radius 6 m with speed 3π m/s. Find the distance and displacement after 3 s. |
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Answer» An object travels around a circle of radius 6 m with speed 3π m/s. Find the distance and displacement after 3 s. |
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| 13. |
23.what is the acceleration due to gravity at a distance 3r from the center of earth if gratational potential at distance r from the centre of earth is v ? ( Assume r>R , where R = radius of Earth) 1) v/9r 2)v/3r 3)v/4r 4)v/2r |
| Answer» 23.what is the acceleration due to gravity at a distance 3r from the center of earth if gratational potential at distance r from the centre of earth is v ? ( Assume r>R , where R = radius of Earth) 1) v/9r 2)v/3r 3)v/4r 4)v/2r | |
| 14. |
80.A disc arranged IN a vertical plane has two groves of same length directed along vertical chord AB and CD as shown IN figure. The same particle slide down along AB and CD. The ratio of time AB/CD is 1:2 1:root2 2:1 root2:1 |
| Answer» 80.A disc arranged IN a vertical plane has two groves of same length directed along vertical chord AB and CD as shown IN figure. The same particle slide down along AB and CD. The ratio of time AB/CD is 1:2 1:root2 2:1 root2:1 | |
| 15. |
Q. Using mirror formula show that An object placed between the pole and the focus of a concave mirror produces a virtual and enlarged image |
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Answer» Q. Using mirror formula show that An object placed between the pole and the focus of a concave mirror produces a virtual and enlarged image |
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| 16. |
A ball is projected vertically upwards with a certain initial speed. Another ball of the same mass is projected at an angle of sixty degree with vertical with same initial speed. At highest point of their journey what will be ratio of their potential energies? |
| Answer» A ball is projected vertically upwards with a certain initial speed. Another ball of the same mass is projected at an angle of sixty degree with vertical with same initial speed. At highest point of their journey what will be ratio of their potential energies? | |
| 17. |
11. a long straight conductor is bent in form of a right angle as shown it carries current i magnetic field at point (p,q) where p is greater than 0 and q is greater than 0 is |
| Answer» 11. a long straight conductor is bent in form of a right angle as shown it carries current i magnetic field at point (p,q) where p is greater than 0 and q is greater than 0 is | |
| 18. |
Q 11/30 The least angle of deviation for a glassprism is equal to its refracting angle. The refractiveindex of glass is 1.5. Then the angle of the prism is2cos14sin4-1SinCOS |
| Answer» Q 11/30 The least angle of deviation for a glassprism is equal to its refracting angle. The refractiveindex of glass is 1.5. Then the angle of the prism is2cos14sin4-1SinCOS | |
| 19. |
State two advantages and two disadvantages of producing hydro electricity. |
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Answer» State two advantages and two disadvantages of producing hydro electricity. |
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| 20. |
13. A vessel has 6temperature 400 K. A small hole is made in it sothat O, leaks out. How much O, leaks out if theg of oxygen at a pressure P and22pressure is P/2 and temperature 300 K?(2) 4 g(1) 5 g(4) 3 g(3) 2 g |
| Answer» 13. A vessel has 6temperature 400 K. A small hole is made in it sothat O, leaks out. How much O, leaks out if theg of oxygen at a pressure P and22pressure is P/2 and temperature 300 K?(2) 4 g(1) 5 g(4) 3 g(3) 2 g | |
| 21. |
The reduce mass of two particles having masses m and 2m is (1) 2m (2)3m (3) 2m/3 (4) m/2 |
| Answer» The reduce mass of two particles having masses m and 2m is (1) 2m (2)3m (3) 2m/3 (4) m/2 | |
| 22. |
There is an air-filled 1 pF parallel plate capacitor. When theplate separation is doubled and the space is Slled with wax,the capacitance increases to 2 pF. The dielectric constant ofwax is:(a) 2\lbrack Kerala (PM1j 2001\rbrack(d) 8(b) 4(c) 6 |
| Answer» There is an air-filled 1 pF parallel plate capacitor. When theplate separation is doubled and the space is Slled with wax,the capacitance increases to 2 pF. The dielectric constant ofwax is:(a) 2\lbrack Kerala (PM1j 2001\rbrack(d) 8(b) 4(c) 6 | |
| 23. |
An optician advises an old man to use lenses of power +3.5 D .What defect the old man is suffering from??? |
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Answer» An optician advises an old man to use lenses of power +3.5 D .What defect the old man is suffering from??? |
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| 24. |
When battery is changing the non electrostatic force of battery mechanism,will it bring the positive charge from negative to positive or positive to negative?why does potential of terminals increase while charging? |
| Answer» When battery is changing the non electrostatic force of battery mechanism,will it bring the positive charge from negative to positive or positive to negative?why does potential of terminals increase while charging? | |
| 25. |
67.A solenoid with length l and radius r has inductance as L .then same wire is used to make a solenoid of length l/2 and radius r/2 then self inductance will be |
| Answer» 67.A solenoid with length l and radius r has inductance as L .then same wire is used to make a solenoid of length l/2 and radius r/2 then self inductance will be | |
| 26. |
A body is launched up an inclined plane with inclination Alpha to horizontal. It is observed that the time of ascent is half of the time of descent along length of incline. The coefficient of friction between the body and the incline is xtanalpha find the value of x |
| Answer» A body is launched up an inclined plane with inclination Alpha to horizontal. It is observed that the time of ascent is half of the time of descent along length of incline. The coefficient of friction between the body and the incline is xtanalpha find the value of x | |
| 27. |
The half-life of 198Au is 3 days. If atomic weight of 198Au is 198 gm/mol, then the activity of 2 mg of 198Au is (in disintegrations/second) : |
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Answer» The half-life of 198Au is 3 days. If atomic weight of 198Au is 198 gm/mol, then the activity of 2 mg of 198Au is (in disintegrations/second) : |
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| 28. |
Define moment of couple. Write its S.I. unit. |
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Answer» Define moment of couple. Write its S.I. unit. |
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| 29. |
ntThe blades of a wind mill sweep out a circle of area A . If wind flows with velocity v perpendicular to blades of wind mill and its density is 'd' then mechanical power recieved by wind mill is ?n |
| Answer» ntThe blades of a wind mill sweep out a circle of area A . If wind flows with velocity v perpendicular to blades of wind mill and its density is 'd' then mechanical power recieved by wind mill is ?n | |
| 30. |
Explain flow of charges inside a wire. |
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Answer» Explain flow of charges inside a wire. |
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| 31. |
Question 18 (d)Explain:(d) How does the resistance of a wire vary with its area of cross-section? |
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Answer» Question 18 (d) Explain: (d) How does the resistance of a wire vary with its area of cross-section? |
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| 32. |
For the arrangement shown in the figure, the switch is closed at t=0. The time after which the current becomes 2.5 μA is given by (take ln 2 = 0.69) |
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Answer» For the arrangement shown in the figure, the switch is closed at t=0. The time after which the current becomes 2.5 μA is given by (take ln 2 = 0.69) |
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| 33. |
Define ohms law |
| Answer» Define ohms law | |
| 34. |
if 2 % of solar energy is captured by producers,which amount of fixed energy would be available for tertiary consumers |
| Answer» if 2 % of solar energy is captured by producers,which amount of fixed energy would be available for tertiary consumers | |
| 35. |
When an object of height 1 cm is kept at a distance of 4 cm from a concave mirror, its upright image of height 1.5 cm is formed at a distance of 6 cm behind the mirror. Calculate the focal length of the mirror(only magnitude) ___ |
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Answer» When an object of height 1 cm is kept at a distance of 4 cm from a concave mirror, its upright image of height 1.5 cm is formed at a distance of 6 cm behind the mirror. Calculate the focal length of the mirror(only magnitude) |
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| 36. |
30. 21 J of heat energy is supplied to a diatomic idealgas at constant pressure, then change in internalenergy of the gas is(1) 10 J(2) 12 J(3) 15 J(4) 18 J |
| Answer» 30. 21 J of heat energy is supplied to a diatomic idealgas at constant pressure, then change in internalenergy of the gas is(1) 10 J(2) 12 J(3) 15 J(4) 18 J | |
| 37. |
Name the devices or machines which convert:(i) Electrical energy into sound energy.(ii) Chemical energy into mechanical energy.(iii) Chemical energy into heat energy.(iv) Light energy into heat energy. |
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Answer» Name the devices or machines which convert: (i) Electrical energy into sound energy. (ii) Chemical energy into mechanical energy. (iii) Chemical energy into heat energy. (iv) Light energy into heat energy. |
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| 38. |
In which of the following ways can we reduce the water pollution in any river? |
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Answer» In which of the following ways can we reduce the water pollution in any river? |
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| 39. |
How to find the nearest and next nearest coordination number of BCC? |
| Answer» How to find the nearest and next nearest coordination number of BCC? | |
| 40. |
Why so3-2 produces with o2 on anode at electroelectrolysis of aqueous h2so4 ? |
| Answer» Why so3-2 produces with o2 on anode at electroelectrolysis of aqueous h2so4 ? | |
| 41. |
Which of the following statements is true? |
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Answer» Which of the following statements is true? |
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| 42. |
Calculate ^° (CH2ClOOH) if ^° values for HCl, KCl and CH2ClCOOK are respectively, 4.261, 1.499 and 1.132 ohm-¹ cm² mol-¹. |
| Answer» Calculate ^° (CH2ClOOH) if ^° values for HCl, KCl and CH2ClCOOK are respectively, 4.261, 1.499 and 1.132 ohm-¹ cm² mol-¹. | |
| 43. |
In a step down transformer ___. |
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Answer» In a step down transformer |
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| 44. |
For a certain organ pipe, three successive resonance frequencies observed are 425Hz ,595Hz and 765Hz. Taking the speed of sound to be 340m/s, find the length of the pipe (in meters). |
| Answer» For a certain organ pipe, three successive resonance frequencies observed are 425Hz ,595Hz and 765Hz. Taking the speed of sound to be 340m/s, find the length of the pipe (in meters). | |
| 45. |
Name of the bacteria that is present in human intestines whose presence in water indicates contamination by disease-causing micro-organisms. |
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Answer» Name of the bacteria that is present in human intestines whose presence in water indicates contamination by disease-causing micro-organisms. |
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| 46. |
Explain the difference:AC generator and DC generator. |
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Answer» Explain the difference: AC generator and DC generator. |
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| 47. |
the isotopic abundance of c-12 & C -14 is 98% & 2% respectively. what would be the no. of c-14 isotope in 12gC sample? |
| Answer» the isotopic abundance of c-12 & C -14 is 98% & 2% respectively. what would be the no. of c-14 isotope in 12gC sample? | |
| 48. |
Can electrons exist without atoms? |
| Answer» Can electrons exist without atoms? | |
| 49. |
Which of the following statements are correct about capacitor? |
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Answer» Which of the following statements are correct about capacitor? |
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| 50. |
Why clouds appear black during or before rain? |
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Answer» Why clouds appear black during or before rain? |
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