Class 11 Physics Online Test

1. All materials follow hooke’s law in its initial stages. True or False?

2. A simple pendulum,hanging from the ceiling, is released from an angle . What is the restoring force?

3. A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the magnitude of the final momentum of the system in Kg-m/s?

4. Which of the following is the correct formulation for the second law of motion?

5. Number of significant digits in 0.0028900 is ______

6. For an object experiencing weightlessness _____

7. The variables like pressure, volume, temperature of a thermodynamic system are microscopic. True or False?

8. For a satellite executing an elliptical orbit around a planet, its minimum potential energy is at the perigee.

9. What is the correct expression for Work?

10. Which of the following is the correct formula for finding distance (d) between two points (x₁, y₁) and (x₂, y₂)?

11. Mass is a ____

12. What is the full form of SI?

13. A ball of mass 100 g is moving with a velocity of 3 m/s towards east. A cube of mass 200 gram is moving towards west with a velocity of 7 m/s. If the collision is perfectly elastic, what is the final velocity of the ball in m/s?

14. In which category do potential and kinetic energy fall?

15. Three forces act on a body. Two of them are 7î - 13ĵN and 2î - 11ĵ. What is the value of the other force?

16. A dam produces electricity from the gravitational potential energy of the water stored in it. The same dam has 50 cubic km of water stored 50 meters above the ground. What is the work done by gravity relative to the ground? (Assume g = 10 m/s²)

17. Gravitational potential energy can be zero but gravitational potential can never be zero.

18. A car moves with zero initial velocity up to a velocity of 5 m/s with an acceleration of 10 m/s². The distance covered is ___

19. A satellite of mass “m” is in a circular orbit of radius 1.5R around the earth of radius R. How much energy is required to move it to an orbit of radius 2R?

20. Select the correct statement regarding the force on a particle in SHM.

21. What is the maximum number of unknowns that can be found through a simple dimensional equation?

22. A circular disc is rotating about a central axis perpendicular to its diameter with a speed of 5rad/s. If a constant force of 2N is applied tangentially on it, in how much time will it come to a stop? Radius of disc = 1m & mass = 1kg.

23. Fire is a form of _____

24. The velocity with which an object should be projected from the surface of the earth such that it reaches a maximum height equal to “n” time the radius of earth “R” is _____ (M = Mass of the earth)

25. A projectile has both change in kinetic and potential energy. Still the work done calculated between any two points is zero. This is due to _________

26. What is the net amount of energy per unit time being received by a body having a temperature of 40 °C in a surrounding of 60°C? (The surface area of body = 2m², σ = 5.67*10^-8W/ m²K⁴ & emissivity of 0.4).

27. Find work done by one mole of a gas in one cycle. V₁ = 1m³, V₂ = 4m³, V₃ = 6m³, V₄ =3m³. Temperature is given in °C.

28. What is the standard form for the resolution of a vector having magnitude ‘a’ and is inclined at an angle θ to the X axis?

29. What are the steps of the scientific method?

30. For the graph shown in the figure, what is the area under the curve AB called?

31. A closed container contains 0.6m³ of neon gas at 200K temperature and 1.3*10⁵Pa. Find the rise in temperature when 8360 J of heat is supplied to it. The molar heat capacity of neon at constant volume is 3.2calK^-1mol^-1. Assume the container doesn’t expand on heating.

32. The electromagnetic energy emitted by a perfect radiator corresponding to a temperature T and surface area A is?

33. A 10kg object is raised to a height of 20m. What is the magnitude of its potential energy? (Assume g = 10 m/s²)

34. A displacement function is given by: x = exp(sin2t). It is periodic. True or False?

35. What is the frequency with which forced periodic oscillations oscillate?

36. A pendulum of mass 2kg is given an energy of 200J then the maximum height it will reach is _____

37. A spring is fixed to the ground as shown below. A block of mass m is fixed to the spring. The spring is compressed by 5cm. Imagine that we can remove the spring suddenly and the block will fly off with the speed it has at that instant. The spring has to be removed at such a position that the distance travelled upwards by the block relative to that position is maximum. Find that position.

38. An object is travelling at a velocity of 10 m/s. It has a mass of 2 kg. It impacts a spring of spring constant “k” as shown in the figure. What is the compression of the spring?

39. What is the velocity for a body following the graph below at 10s?

40. The coefficient of a refrigerator can be greater than 1. True or False?

41. The product of an extensive and intensive variable is?

42. Three objects of mass 1 kg each are placed at corners of a right-angled triangle AOB as shown in the figure. Consider ‘O’ as the origin and OA = OB = 1m. Determine the position of the centre of mass of this system.

43. A rod having α = 1*10^-5per °C and length of 70cm has one of its end rigidly connected to another rod of length 1m and α= 0.5*10^-5per °C. Find the new length of the two joined rods when their temperature is increased by 30℃.

44. What is the unit of coefficient of area expansion?

45. The escape velocity at the event horizon of a black hole is 3x10⁸ m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?

46. Adding î + 77ĵ and 7î + ĵ gives ______

47. The stress corresponding to fracture point is called ______

48. Two springs in horizontal spring mass systems have spring constants in the ratio 2:3. By what ratio should they be extended from their mean positions so that they have the same value of maximum speed? The masses of blocks are the same in both cases.

49. A uniform free rectangular steel plate is heated from 273 to 373 kelvin. The initial area of the plate is 15 sq. cm. What is the shift of the centre of mass?

50. The elliptical orbits of planets were indicated by calculations of the orbit of which astronomical body?