Sunday, May 16, 2021

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Alternating Current

This is class note of Ac current

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Acoustic Phenomena


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Question Pressure

  1.  Sharp knife cuts more easily than a blunt one. Explain with reason.
  2. What is the effect on pressure when the area is increased by keeping the magnitude of the force constant ?
  3. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot why ?
  4. Prove that, p= F/A.
  5. If a man has mass 60 kilogram and the area of his one foot is 150 cm. What is pressure exerted by him on the ground when he stepped with one foot?
  6. Anupama has a mass of 30 kg and the surface area that her sandal occupies is 150 cm2. Then what will be the magnitude of pressure if she stands on one foot?
  7. What is meant by pressure? Write in which SI unit it is measured.
  8. Give any two examples, application of pressure in our daily life?
  9. Write two factors that affect the pressure.
  10. What is meant by one Pascal pressure?
  11. What is meant by pressure?
  12. What is the SI unit of pressure?
  13. What are the two aspect of or daily life where there is appliaction of pressure?
  14. What are the two factors that affect pressure?
  15. What is meant by one pascal pressure?
  16. What happens to pressure when surface area is increased but the force is kept constant?
  17. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot, why?
  18. It is easier to cut with sharp knifes than the blunt ones. Why?
  19. If we stand two ladies, one wearing pointed heel shoe and another with flat shoe, in a line. Explain which one will exert more pressure on the ground.
  20. What is lactometer?
  21. The base of a rectangular vessel measures 10 cm x 18 cm. Water is poured in it to the depth of 4 cm. What are the pressure and force on the base?
  22. A girl weight 30 kg and surface area of the heel of her shoe is 100 cm2. Find the pressure exerted on the ground if she stands on her single foot(Take g = 10m/s2).
  23. Sharp knife cuts more easily than a blunt one. Explain with reason.
  24. What is the effect on pressure when the area is increased by keeping the magnitude of the force constant ?
  25. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot why ?
  26. Prove that, p= F/A.
  27. If a man has mass 60 kilogram and the area of his one foot is 150 cm. What is pressure exerted by him on the ground when he stepped with one foot?
  28. Anupama has a mass of 30 kg and the surface area that her sandal occupies is 150 cm2. Then what will be the magnitude of pressure if she stands on one foot?
  29. What is meant by pressure? Write in which SI unit it is measured.
  30. Give any two examples, application of pressure in our daily life?
  31. Write two factors that affect the pressure.
  32. What is meant by one Pascal pressure?
  33. What is meant by pressure?
  34. What is the SI unit of pressure?
  35. What are the two aspect of or daily life where there is application of pressure?
  36. What are the two factors that affect pressure?
  37. What happens to pressure when surface area is increased but the force is kept constant?
  38. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot, why?
  39. It is easier to cut with sharp knifes than the blunt ones. Why?
  40. If we stand two ladies, one wearing pointed heel shoe and another with flat shoe, in a line. Explain which one will exert more pressure on the ground.
  41. What is lactometer?
  42. The base of a rectangular vessel measures 10 cm x 18 cm. Water is poured in it to the depth of 4 cm. What are the pressure and force on the base?
  43. A girl weight 30 kg and surface area of the heel of her shoe is 100 cm2. Find the pressure exerted on the ground if she stands on her single foot(Take g = 10m/s2).
  44. Sharp knife cuts more easily than a blunt one. Explain with reason.
  45. What is the effect on pressure when the area is increased by keeping the magnitude of the force constant ?
  46. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot why ?
  47. Prove that, p= F/A.
  48. If a man has mass 60 kilogram and the area of his one foot is 150 cm. What is pressure exerted by him on the ground when he stepped with one foot?
  49. Anupama has a mass of 30 kg and the surface area that her sandal occupies is 150 cm2. Then what will be the magnitude of pressure if she stands on one foot?
  50. What is meant by pressure? Write in which SI unit it is measured.
  51. Give any two examples, application of pressure in our daily life?
  52. Write two factors that affect the pressure.
  53. What is meant by one Pascal pressure?
  54. What is meant by pressure?
  55. What is the SI unit of pressure?
  56. What are the two aspect of or daily life where there is appliaction of pressure?
  57. What are the two factors that affect pressure?
  58. What is meant by one pascal pressure?
  59. What happens to pressure when surface area is increased but the force is kept constant?
  60. A man exerts more pressure under his foot when he stands with one foot than when he stands on two foot, why?
  61. It is easier to cut with sharp knifes than the blunt ones. Why?
  62. If we stand two ladies, one wearing pointed heel shoe and another with flat shoe, in a line. Explain which one will exert more pressure on the ground.
  63. What is lactometer?
  64. The base of a rectangular vessel measures 10 cm x 18 cm. Water is poured in it to the depth of 4 cm. What are the pressure and force on the base?
  65. A girl weight 30 kg and surface area of the heel of her shoe is 100 cm2. Find the pressure exerted on the ground if she stands on her single foot(Take g = 10m/s2).
  66. Study the diagram and answer the following questions,
    1. What is the weight of stone in air?
    2. How much upthrust is exerted by liquid on the stone?
    3. Calculate mass of the object.
  67. The weight of stone when immersed in water is 9N and weight of displaced water is 2N.  Answer the following questions:

    1. What reading will the spring balance will show when the stone is taken out from water?
    2. Name the principle verified by this experiment. Also state the principle.
  68.  A solid object weight 34N in air and 10N in water . What is the upthrust and weight of the liquid displaced ?
  69. State the law of floatation. 

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Force Question

  1.  Write down the relationship of gravitational force with the distance between two heavenly objects and their masses.
  2. What is gravitational constant?
  3. Calculate the gravitational force between two masses of 10 kg and 20 kg if they are at 10 meter distance.
  4. The earth having the mass 6 × 1024 kg revolves around the sun of mass 2 × 1030 kg in a circular orbit of radius 1.5 × 1011 m. Calculate the force of attraction between them (G = 6.67 × 10-11 Nm2/kg2 ).
  5. The mass of the earth is 6 × 1024 kg and its radius is 6400 km. What is the mass of a man weighing 977N in a spring balance?
  6. What will happen to the gravitational force of attraction between two bodies when the mass of each body is doubled and the distance between them is tripled?
  7. State Newton's law of Gravitation. Calculate the force with which the moon pulls every kilogram of water in our rivers given that the moon is 3 × 105 km away from Nepal and the mass of the moon is 7 × 1022 kg.
  8. What happens to the force between two objects, if the distance between the object is doubled?
  9. At what condition the value of gravitational force (F) becomes 6.67 × 10-11 N? Show by calculation.
  10. What is gravity?
  11. Write the differences between free fall and weightlessness?
  12. In which direction the force of gravity act?
  13. What's the scientific name of human being?
  14. why the gravity of jupiter is only two times greater that that of earth though it has extremly greater mass than earth
  15. What will be the effect on the gravitational field intensity of the earth if it is squeezed to the size of the moon? (Given: Radius of the earth = 63.8 × 105 m and radius of the moon = 1.7 × 106 m)
  16. A paratrooper lands safely when jumped from a great height, why?
  17. Why is the value of "g" greater in Terai region than the Himalayan region?
  18. Write three differences between acceleration due to gravity (g) and gravitational constant (G).
  19. It is difficult to lift a large stone on the surface of the earth but easy to lift small one, why?
  20. The value of "g" is more at poles than at the equator, why?
  21. If an iron ball and a feather are dropped simultaneously from the same height in vacuum which one will strike the ground first and why?
  22. A feather and a coin fall simultaneously on the surface of the moon, why?
  23. The probability of getting hurt is more when a man jumps from a significant height, why?
  24. If the mass of the moon is 7.2 × 1022 kg and radius 1.7 × 106 m, what will be acceleration due to gravity of the moon? What will be the weight of a man of 60 kg mass of the moon?
  25. The radius of the earth is 6.4 × 103 km height of the Mount Everest is 8848 m. If the value of "g" at the surface of the earth is 9.8m/s2, calculate the value of g at the top of Mount Everest. Also find the weight of the body of mass 25 kg on the top of the Mount Everest.
  26. The acceleration due to gravity on the earth is 9.8 m/s2. What do you meant by this statement?
  27. Prove that the acceleration due to gravity(g) is inversely proportional to the radius of the earth(R).
  28. The  mass  of the Jupiter is 1.9  x  1027 kg and its radius is 7.1 x 10 7m. What is the acceleration  due to gravity on the Jupiter?  Also, calculate the weight of a person having mass 60 kg in Jupiter.
  29. At what condition a coin and a feather fall together? What is the acceleration of the feather and the coin at that instant? Justify your answer.
  30. What is free fall?
  31. What is meant by weightlessness?
  32. What is the difference between fall of a parachute on the earth and that on the moon?
  33. In real life, objects do not fall freely. Give reason.
  34.   In the figure below, two identical metal balls A and B having equal masses are being dropped towards the surface of moon and earth. Analyse the given data and answer the following questions: 

    1.  If both the metal balls are released simultaneously, which one does strike the ground faster? Show with calculation.
    2. A person lifts 30kg on the surface of the earth. How much mass can he lift on the surface of the moon if he applies same magnitude of force?
  35.  A meteor is falling towards the Earth. If mass and radius of the earth are 6x1024 kg and 6.4x103 km respectively. Find the height of meteor from the earth's surface where its acceleration due to gravity becomes 4 m/s2. The weight of a body decreases in a coal mine, why?
  36. The gravitational force produced between any two objects kept 2.5x104 km apart is 580N. At what distance should they be kept so that the gravitational force becomes half.
  37. Clarify the statement, "acceleration due to gravity of the earth is 9.8 m/s2"
  38. How much time does a stone take to reach on the surface of the earth drop from the height 20 m and what will be its acceleration due to gravity after 3 seconds. (g = 10 m/s2)
  39. Atmosphere is present around the surface of earth but it is not present in the moon, why? The mass of Jupiter is 319 times mass of the earth and its radius is 11 times that of earth. Calculate the acceleration due to gravity on surface of Jupiter also calculate the mass of an object in Jupiter whose mass in Earth is 85kg.

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10 Science Video Class

  Video Class

SEE Class 10 complete Video Class
Force
Pressure 1
Pressure 2
Energy
Heat
Light
Electricity and magnetism 1
Electricity and Magnetism 2
Electricity and Magnetism 3
Classification of Elements
Chemical Reaction
Acid Base and Salt 1
Acid Base and Salt 2
Some Gases
Metals
Hydrocarbons
Materials used in Daily Life 1
Materials used in daily life 2
Invertebrates
Nervous and Glandular System
Circulatory System
Chromosome and Sex Determination
Asexual Reproduction 1
Asexual Reproduction 2
Heredity
Environment Pollution
History of Earth
Atmosphere
Universe
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WELCOME

Dear students, As your way of study has been transformed due to the necessity of time which may be due to the advancement of technology or due to the pandemic, we have experienced that students are facing serious problems regarding the learning resources. So this is an attempt to provide a complete resource platform for students. We need your valuable suggestions to make this blog really useful and meaningful.

 Dear students, 

As your way of study has been transformed due to the necessity of time which may be due to the advancement of technology or due to the pandemic, we have experienced that students are facing serious problems regarding the learning resources. So this is an attempt to provide a complete resource platform for students. We need your valuable suggestions to make this blog really useful and meaningful.

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