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Physics Quiz 12 (60 MCQs)

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1. The units of capacitance are
2. When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called
3. Physics, aside from being a natural science, is also an experimental science. Experiment usually involves the use of ..... by which it generally uses numbers in describing the results of that particular experiment.
4. A car parked on a hill starts to coast down the hill, accelerating from rest at a constant rate of 0.45 m/s2. How fast will the car be moving after 7.0 s?
5. When a ray of light enters from denser medium to rare medium it bends
6. Darth Vader lost his control of the "force" so he had no choice but to push Luke Skywalker with a horizontal applied force of 55 N. If he was able to do a 275-J work on Luke, how far will Luke be after the push?
7. What happens to the gravitational force if both of the masses of the two objects interacting gravitationally are doubled?
8. Which of the following affects the launched of the projectile motion?
9. Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
10. It is a state in which heat transfer between two thermal conductors can no longer happen after reaching equal temperatures.
11. What happens to the force between two charged objects if you triple the magnitude of one charge?
12. -capability of an electric field to permeate through a vacuum.
13. What is known as the moment of force?
14. If tight scissors have an efficiency of 50%, half of your work is wasted due to
15. How much wood do you need to a form a triangular garden frame if one side of the frame has a length of 11 ft, and the other two sides are 2 feet longer than the first side?
16. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at p
17. Impulse is the product of ..... and the time interval during which the force acts.
18. After a bowling ball has fallen for 1 second, approximately how fast is it going, vertically?
19. How to add vectors graphically?
20. A runway dog walks 0.64 km due N. He then runs due W to a hot dog stand. If the magnitude of the dog's total displacement vector is 0.91 km, what is the magnitude of the dog's displacement vector in the due west direction?
21. A coin was thrown vertically upwards and it rose to a length of 10 metres. What was the time taken by the body to reach the highest point?
22. What does q measure?
23. Einstein got the Nobel prize for?
24. At what point is the projectile's vertical velocity equal to zero?
25. What is 78.5 rounded to one significant figure?
26. What is the unit for electrostatic charge?
27. Out of the following, which is not emitted by radioactive substance?
28. An attractive force exists between which two particles?
29. A 931-g object is attached to a spring with spring constant of 587 N/m and is undergoing simple harmonic motion. What is the object's horizontal displacement if the spring force is 50 N?
30. A policeman traveling 19.5 m/s spots a speeder ahead, so he accelerates his vehicle at a steady rate of 1.81 m/s2 for 3.2 s, at which time he catches up with the speeder. What distance does the police car cover in that time?
31. $ V=\ VmSin\omega t$ is the wave equation for
32. If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this?
33. A hacky sack is thrown up into the air with an initial velocity 3 m/s. What is the hang time of the hacky sack if it returns to the same point from which it was thrown?
34. In the expression $ \frac{A}{B \cdot C}$, A has 5 significant figures, B has 2 significant figures, and C has 3 significant figures. How many significant figures does the quotient have?
35. What will be the effect on gravitational acceleration if the earth suddenly stops its rotation?
36. What material partiallyopposes a capacitor's electric field but can increase capacitance and preventthe capacitor's plates from touching?
37. A cyclist rides 300 m up a slope in 50 s. She then rides down the slope in 25 s. What is her average speed for the whole journey?
38. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
39. After some rather exhausting counting (and a rather tall tale), a physics teacher determines that a very small sample of an object contains 8.25749 x 1017 protons and 5.26 x 1014 electrons; the charge on this object is ..... Coulombs.
40. UNIT OF FORCE IS
41. A device can produce sound with a frequency range of 20 Hz-20 kHz(20 000 Hz). What is the most appropriate for the device?
42. If we have more oxygen in air what will happen?
43. What is the correct formula to find the resultant force?
44. At what temperature a body will not radiate any heat energy?
45. Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be
46. Light is a form of
47. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
48. Which of the following is equivalent to half a meter?
49. How much work input is required to lower (not drop) a 120 pound weight from the top of a 3 foot table to the floor
50. Ohmic conductor among the following is .....
51. Only one part of moon can be seen from earth because.....
52. Blisters are formed more rapidly by the steam of boiling water in comparision to boiling water itself because .....
53. Which will weigh the least?
54. Wood is an example of
55. What law describes how acceleration, mass and net force are related?
56. Determine the quantity and type of charge on an object that has 3.62 x 1012 more protons than electrons.
57. A weight-lifter raises a 2000 N weight through a vertical height of 2.0 m in 0.80 s.What useful power does he develop in doing this?
58. Which statement is correct about a bottle of water?
59. What happens to the force between two charged objects when you double the distance between them?
60. Capacitors which all are connected to the same source of potential.
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