MDCAT XI Physics Vectors+ Fluid Dynamics Current Online Test-2

1. The maximum velocity at which the weight of the body is equal to upthrust force of fluid is called as :

2. The law which states that the  Drag force experienced by a small spherical body in a fluid is related to velocity of the body and viscosity of fluid is called as:

3. A drop of rain falling with the terminal velocity of 8.7m/s near the surface of earth what will be the radius of this drop if density of water is 1000kg/m³ and density of air is 1kg/m³:

4. If the mass of small spherical bob is doubled and radius is reduced to half then the drag force on the bob in a fluid will:

5. In a steady flow the velocity of fluid particles at any instant:

6. Unsteady flow of a fluid is characterized by which one of the following characteristics:

7. For an incomprehensible fluid the equation of continuity is :

8. Equation of continuity is the form of law of :

9. when the range of Reynolds number (Re)is 2300←Re←4000 then this type of flow of fluid is characterized as:

10. An ideal fluid is characterized with which one of the following properties:

11. According to the equation of continuity of the expression is  AV=X , Then what are the dimensions of X:

12. Following the Bernoulli's principle which one of the following relationship can be assumed:

13. Bernoulli's principle is the practical example of :

14. When a person is standing close to the railway track a fast train passes to him and pulls the person it is idealized condition assumed under the :

15. Flow of blood through blood vessels is the practical application of :

16. The dimensions of coefficient of viscosity are:

17. Venturi meter is an application of Bernoulli's principle which is used to measure the :

18. The effect of decrease in pressure with the increase of speed of fluid in a horizontal pipe is known as :

19. In which one of the following type of fluid flow the path of fluid particles cannot be tracked :

20. Which one of the following equation represents Stokes' law :

21. According to the equation of continuity,A1V1=A2V2 = constant,where the constant is equal to:

22. When the resultant of two forces of equal magnitude is also equal to the magnitude of forces ,then the angle between two forces can be equal to:

23. If A.B=A×B then the angle between them can be :

24. Which one of the following physical quantity is the result of cross product of the two vectors:

25. Assertion: Terminal velocity is attained when net force on the object is zero.

Reason: At terminal velocity, drag and upthrust cancel out the weight of the object.

26. A single vector having the same effect as all the original vectors taken together is called:

27. The resultant of two forces 30N and 40N acting at an angle 90 is equal to:

28. what is the mathematical value of unit vector is equal to:

29. A force of 10N is acting along x-axis it's component along y-axis is equal to:

30. pick the odd one from the followings:

31. Dot product of two non-zero vectors is zero, when the angle between them is equal to:

32. The minimum number of unequal forces whose resultant will be zero :

33. If A.B=1,A=2,B=1 then the angle between them is equal to:

34. The sum of magnitude of two forces is 16N .The resultant force is 8N and it's direction is perpendicular to the minimum force,then the forces are :

35. If |A|=|B|,then what is the angle between A+B and A-B is equal to:

36. When the two forces of magnitude F are multiplied such that the value of resultant force is also equal to F then what will be the angle between two forces :

37. When fluid is incomprehensible then:

38. Two water droplets have radius ratio 2:3 their terminal velocities will be:

39. Terminal velocity is :

40. Terminal velocity is given by the equation:

41. Terminal velocity of the body is directly proportional to the:

42. Stokes law is applicable to the :

43. When the body reaches to it's terminal velocity,then the acceleration of body becomes:

44. The acceleration of a falling body in a fluid depends upon :

45. Two forces of 12N and 6N are applied to a body simultaneously. The maximum magnitude of their resultant vector is equal to:

46. The magnitude of the resultant of two forces is 2F. If the magnitude of each force is F,then what will be the angle between these two forces :

47. If A=2i+j+2k then the magnitude of this vector is equal to:

48. If the scalar product of the two non-zero vectors A&B is zero,the magnitude of their vector product will be:

49. A fluid is going incomprehensible flow which represents that:

50. The resultant of two forces 5N and 10N cannot be: