Saved Bookmarks
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. |
in the definition of calorimetry why particularaly 14.5-15-5 degree celsius is the number specified? |
|
Answer» in the definition of calorimetry why particularaly 14.5-15-5 degree celsius is the number specified? |
|
| 2. |
considering a system of three point masses of mass 1 kg, 3 kg and 4 kg. If 1 kg and 4 kg mass are displaced by (i+2j)m and (2i +j) m respectively. The displacement that must be givento the 3 kg mass such that the location of centre ofmass remains unchanged is |
| Answer» considering a system of three point masses of mass 1 kg, 3 kg and 4 kg. If 1 kg and 4 kg mass are displaced by (i+2j)m and (2i +j) m respectively. The displacement that must be givento the 3 kg mass such that the location of centre ofmass remains unchanged is | |
| 3. |
The maximum angle of refraction when a light ray is refracted from glass (μ=1.5) to air is |
|
Answer» The maximum angle of refraction when a light ray is refracted from glass (μ=1.5) to air is |
|
| 4. |
Suppose u r in an empty room which contain only UV light. Will u be able to see the wall. What is the range of wavelenght of light we can see. |
|
Answer» Suppose u r in an empty room which contain only UV light. Will u be able to see the wall. What is the range of wavelenght of light we can see. |
|
| 5. |
At what height above the earth's surface,the value of g is same as that at a depth of 100km |
| Answer» At what height above the earth's surface,the value of g is same as that at a depth of 100km | |
| 6. |
The forbidden energy band gap in conductors, semiconductors and insulators is EG1,EG2 and EG3 respectively. The relation among them is |
|
Answer» The forbidden energy band gap in conductors, semiconductors and insulators is EG1,EG2 and EG3 respectively. The relation among them is |
|
| 7. |
Refractive index of diamond is 2.42 and that of glass is 1.5. Calculate the sine of critical angle for the diamond-glass surface. |
|
Answer» Refractive index of diamond is 2.42 and that of glass is 1.5. Calculate the sine of critical angle for the diamond-glass surface. |
|
| 8. |
which is the second focus of concave lens? |
| Answer» which is the second focus of concave lens? | |
| 9. |
Is it true that there exists particles faster than light (like tachyon) ? If yes, then how exactly does it work ? |
|
Answer» Is it true that there exists particles faster than light (like tachyon) ? If yes, then how exactly does it work ? |
|
| 10. |
Choose the correct pair of a function with it's fundamental period. |
|
Answer» Choose the correct pair of a function with it's fundamental period. |
|
| 11. |
Choose the correct pair based on the position of the object and the image formed by a convex lens. At infinity |
Answer» Choose the correct pair based on the position of the object and the image formed by a convex lens.
|
|
| 12. |
Question 3How much energy is given to each coulomb of charge passing through a 6 V battery? |
|
Answer» Question 3 |
|
| 13. |
A coolie X carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head moves the same distance on a frictionless horizontal platform. Who does more work? Explain the reason. |
|
Answer» A coolie X carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head moves the same distance on a frictionless horizontal platform. Who does more work? Explain the reason. |
|
| 14. |
Rakesh wanted to do the prism experiment. He took a prism and passed monochromatic light through it. Which phenomenon would he observe? |
|
Answer» Rakesh wanted to do the prism experiment. He took a prism and passed monochromatic light through it. Which phenomenon would he observe? |
|
| 15. |
An object is said to be in a state of free fall when |
|
Answer» An object is said to be in a state of free fall when |
|
| 16. |
What will be the colour of sky if there is no atmosphere on the earth? |
|
Answer» What will be the colour of sky if there is no atmosphere on the earth? |
|
| 17. |
46. In a rocket, fuel burns at the rate of 2 kg/s. This fuel ejected from the rocket with a velocity of 80 km/s. What is the Force exerted on the rocket? |
| Answer» 46. In a rocket, fuel burns at the rate of 2 kg/s. This fuel ejected from the rocket with a velocity of 80 km/s. What is the Force exerted on the rocket? | |
| 18. |
1. Four bulbs, each of rating (100 W, 220 V) andconnected in parallel across a voltage supply of220 V, are operated for five hours daily. If all the bulbsare replaced by LEDS of rating (8 W, 220 V), howmany units of electrical energy will be saved everymonth (30 days)?(1) 55.2 units(2) 60 units(3) 4.8 units(4) 32 units |
|
Answer» 1. Four bulbs, each of rating (100 W, 220 V) and connected in parallel across a voltage supply of 220 V, are operated for five hours daily. If all the bulbs are replaced by LEDS of rating (8 W, 220 V), how many units of electrical energy will be saved every month (30 days)? (1) 55.2 units (2) 60 units (3) 4.8 units (4) 32 units |
|
| 19. |
A body of mass m is moved to a height equal to the radius of the earth R. The increase in its potential energy is: |
|
Answer» A body of mass m is moved to a height equal to the radius of the earth R. The increase in its potential energy is: |
|
| 20. |
Complete the following table: |
|
Answer» Complete the following table:
|
|
| 21. |
can the charge on a body be 2*10-19 |
| Answer» can the charge on a body be 2*10-19 | |
| 22. |
48 The magnetic force between two poles is 80 units.The separation between the poles is doubled.What is the force between them? |
| Answer» 48 The magnetic force between two poles is 80 units.The separation between the poles is doubled.What is the force between them? | |
| 23. |
What should be the gear ratio of a car while ascending a hill? |
|
Answer» What should be the gear ratio of a car while ascending a hill? |
|
| 24. |
You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer. |
|
Answer» You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer. |
|
| 25. |
the internal resistance of a 2.1V cell which gives a current of 0.2 A through a resistance of 10ohm is? |
| Answer» the internal resistance of a 2.1V cell which gives a current of 0.2 A through a resistance of 10ohm is? | |
| 26. |
he radius of a circular loop is 0.4 m and the current is 12 A. What is the magnitude of magnetic field at the centre of the loop ? \lbrack Given μ0 = 4 ×10–7 Tm/A\rbrack |
| Answer» he radius of a circular loop is 0.4 m and the current is 12 A. What is the magnitude of magnetic field at the centre of the loop ? \lbrack Given μ0 = 4 ×10–7 Tm/A\rbrack | |
| 27. |
A100 W bulb B1two 60 W bulbB2 and B3 are connected to a 250 Vsource as shown in the figure. Now W1, W2 and W3are the output powers of the bulbs B1, B2 and B3respectively. Then |
|
Answer» A
|
|
| 28. |
Which of the following describes the movement of a snake? |
|
Answer» Which of the following describes the movement of a snake? |
|
| 29. |
A symmetrical bi-concave thin lens is cut into two identical halves and arranged as shown.What will be the effective focal length of the arrangement ?[Given, μ= refracting index of material and R= radius of curvature] |
|
Answer» A symmetrical bi-concave thin lens is cut into two identical halves and arranged as shown. |
|
| 30. |
What would happen to the image of an object if half of the portion of a lens is covered with a black paper? |
|
Answer» What would happen to the image of an object if half of the portion of a lens is covered with a black paper? |
|
| 31. |
'Colours are the creation of human eye'. Justify. |
| Answer» 'Colours are the creation of human eye'. Justify. | |
| 32. |
Write the seven prominent colours present in white light in the order of increasing wavelength |
|
Answer» Write the seven prominent colours present in white light in the order of increasing wavelength |
|
| 33. |
In A.2 you will read about alternate sources of energy. Before doing so find out how much you already know about renewable sources of energy.Complete column A, to indicate whether you think each statement is True (), False(X), or whether you do not know (?) After reading the passage, complete column B in the same way. statements (A) (B) (a) Solar energy is a powerful source of energy (b) Electric battery operated cars are more powerful than those run on fossil fuels (c) EV stands for electric vehicles (d) Driving an electric vehicle is stressful (e) Solar power can be the next source of pollution in the world (f) India is one of the countries with a great potential for generation and use of solar energy (g) Using alternate sources of energy can help India save a lot of money spent in foreign exchange |
||||||||||||||||||||||||||||||||
|
Answer» In A.2 you will read about alternate sources of energy. Before doing so find out how much you already know about renewable sources of energy. Complete column A, to indicate whether you think each statement is True (
|
|||||||||||||||||||||||||||||||||
| 34. |
169. Dimensions of resistance in an electrical circuits in terms of the dimension of mass M ,of length L.of time To and current I , would be |
| Answer» 169. Dimensions of resistance in an electrical circuits in terms of the dimension of mass M ,of length L.of time To and current I , would be | |
| 35. |
An AC voltage of 30 V, 50 Hz passes through an ideal inductor of 1 henry. The average power dissipated per cycle in inductor is |
| Answer» An AC voltage of 30 V, 50 Hz passes through an ideal inductor of 1 henry. The average power dissipated per cycle in inductor is | |
| 36. |
A battery of emf E and internal resistance r is connected to a resistor of resistance r1 and Q joules of heat is produced in a certain time t. When the same battery is connected to another resistor of resistance r2 the same quantity of heat is produced in the same time t the value of r is |
|
Answer» A battery of emf E and internal resistance r is connected to a resistor of resistance r1 and Q joules of heat is produced in a certain time t. When the same battery is connected to another resistor of resistance r2 the same quantity of heat is produced in the same time t the value of r is |
|
| 37. |
What are the disadvantages of using fossil fuels? Give two instances where solar cells are exclusively used as source of energy. |
|
Answer» What are the disadvantages of using fossil fuels? Give two instances where solar cells are exclusively used as source of energy. |
|
| 38. |
A stepper motor has a step angle of 2.5∘.Calculate the number of steps required for the shaft to make 25 revolutions. |
|
Answer» A stepper motor has a step angle of 2.5∘.Calculate the number of steps required for the shaft to make 25 revolutions. |
|
| 39. |
A part of a prism has been shown in the figure. If the angle of incidence at the surface I of the prism is 45∘, then the light ray is incident on the surface II at an angle of |
|
Answer» A part of a prism has been shown in the figure. If the angle of incidence at the surface I of the prism is 45∘, then the light ray is incident on the surface II at an angle of |
|
| 40. |
Mention any two ways in which cow dung can be utilised as a fuel. Out of two which is better? Justify. (2 marks) Ans. Cow dung can be used by burning cowdung itself or by burning biogas produced from it. Biogas is more efficient as it's thermal efficiency is higher than that of cow dung. It doesnt contain moisture while cow dung has a lot. (I got only 1 out of 2 marks) What should I add? |
|
Answer» Mention any two ways in which cow dung can be utilised as a fuel. Out of two which is better? Justify. (2 marks) Ans. Cow dung can be used by burning cowdung itself or by burning biogas produced from it. Biogas is more efficient as it's thermal efficiency is higher than that of cow dung. It doesnt contain moisture while cow dung has a lot. (I got only 1 out of 2 marks) What should I add? |
|
| 41. |
Two spheres of radii R and 2R are charged so that both of these have same surface charge density σ the pheres are located away from each other and are connected by a thin conducting wire find the new charge density on the two spheres. |
| Answer» Two spheres of radii R and 2R are charged so that both of these have same surface charge density σ the pheres are located away from each other and are connected by a thin conducting wire find the new charge density on the two spheres. | |
| 42. |
A boy weighs 600N on earth. What would be his weight on the moon?( g = 10msec2) |
|
Answer» A boy weighs 600N on earth. What would be his weight on the moon?( g = 10msec2) |
|
| 43. |
What energy conversion does take place during the working of a d.c. motor? |
|
Answer» What energy conversion does take place during the working of a d.c. motor? |
|
| 44. |
Heat is being supplied at a constant rate to the sphere of ice, which is melting at the rate of 0.1 g/s. It melts completely in 100 s. The rate of rise of temperature thereafter will be-[Take L=80 cal/g] |
|
Answer» Heat is being supplied at a constant rate to the sphere of ice, which is melting at the rate of 0.1 g/s. It melts completely in 100 s. The rate of rise of temperature thereafter will be- |
|
| 45. |
In figure (i), a lens of focal length 10 cm is shown. It is cut into two parts and placed as shown in figure (ii).An object AB of height 1 cm is placed at a distance of 7.5 cm from combination in figure (ii). The height of the image will be |
|
Answer» In figure (i), a lens of focal length 10 cm is shown. It is cut into two parts and placed as shown in figure (ii). |
|
| 46. |
In the shown circuit, a charged capacitor is connected with neutral capacitor and a resistor. Find total heat loss in the resistance R after the switch is closed.दर्शाए गए परिपथ में, एक आवेशित संधारित्र को उदासीन संधारित्र तथा एक प्रतिरोधक के साथ संयोजित किया जाता है। स्विच को बंद करने के बाद प्रतिरोध R में कुल ऊष्मा हानि ज्ञात कीजिए। |
|
Answer» In the shown circuit, a charged capacitor is connected with neutral capacitor and a resistor. Find total heat loss in the resistance R after the switch is closed. |
|
| 47. |
The source of energy of the sun is : (a) conversion of hydrogen gas into helium (b) conversion of carbon fuel into carbon dioxide (c) burning of hydrogen gas present in the sun (d) disintegration of uranium into barium and krypton |
|
Answer» The source of energy of the sun is : |
|
| 48. |
Question 35Find out the following in the electric circuit given in the figure.(a) Effective resistance of two 8 Ω resistors in the combination(b) Current flowing through 4 Ω resistors(c) Potential difference across 4 Ω resistances(d) Power dissipated in 4 Ω resistors(e) Difference in ammeter readings, if any |
|
Answer» Question 35 Find out the following in the electric circuit given in the figure. (a) Effective resistance of two 8 Ω resistors in the combination (b) Current flowing through 4 Ω resistors (c) Potential difference across 4 Ω resistances (d) Power dissipated in 4 Ω resistors (e) Difference in ammeter readings, if any  |
|
| 49. |
What is the difference between refractive index and absolute refractive index? Explain with an illustration. |
|
Answer» What is the difference between refractive index and absolute refractive index? Explain with an illustration. |
|
| 50. |
Diverging incident rays corresponds to real object |
| Answer» Diverging incident rays corresponds to real object | |
), False(X), or whether you do not know (?) After reading the passage, complete column B in the same way.
