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Physics – General – LS

Physics – Set 6

Dear ! This is Physics – Set 6  Quiz and it contains 100 questions.

Happy Learning!

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1. An egg sinks in soft water but floats in a concentrated solution of salt because

 

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2. Which of the following is not a form of Energy?

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3. A fresh egg when placed in salt water will

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4. If electric resistance is to be decreased, then the number of resistances should be connected in ________

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5. Which one of the following reflects back more sunlight as compared to other three?

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6. Convex mirror is generally used in ________

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7. When a ship enters the sea from a river what will be the effect?

 

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8. What is the reason for formation of Mirage in desert?

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9. In which one of the following the phenomenon of total internal reflection of light is used ?

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10. Optical fibres are based on the phenomenon of

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11. In mirrors the back surface is coated with a thin layer of :

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12. If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?

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13. How much mechanical work must be done to completely melt 1 gram of ice at 0°C ?

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14. Which one of the following reflects back more sunlight as compared to other three?

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15. The type of mirrors used in the headlamp of cars is

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16. In very cold countries alcohol is used as a thermometric liquid because

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17. Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly

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18. When a piece of stone is immersed in water, it displaces water of equal

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19. What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

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20. A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will

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21. A solid needle placed horizontally on the surface of the water floats due to

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22. Which type of mirror is used in the head lights of vehicles ?

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23. The device used for locating submerged objects under sea is.

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24. An optically plane surface reflects a beam of light

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25. Rear view mirror of car is convex or concave?

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26. A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.

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27. Which of the following is a good conductor of heat but a bad conductor of electricity ?

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28. Shaving mirror is

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29. A good conductor while carrying current is

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30. The phenomenon which causes mirage is

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31. At what temperature do the Fahrenheit and Celsius scales give the same reading?

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32. Which of the following is the second largest source of global energy?

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33. Convex mirrors are used as a rear view mirror in motor cycles because

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34. Buoyancy depends on

 

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35. A periscope works on the principle of

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36. When a ship enters the sea from a river

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37. Burns caused by steam are much severe than those caused by boiling water because

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38. At what temperature (in Fahrenheit) pure water freezes?

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39. When a ship enters the sea from a river what will be the effect?

 

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40. The angle between the ________ and the incident ray is called the angle of incidence.

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41. Brightness of bulb depends on voltage or current?

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42. Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

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43. Absolute Zero is defined as

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44. A gas thermometer is more sensitive than a liquid thermometer because a gas :

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45. The magnitude of buoyant force depends on the ________ of the fluid.

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46. Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

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47. The temperature of a liquid is 32° F. What is its temperature in Celsius scale?

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48. Clouds float in the atmosphere because of their

 

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49. The resistance of a conductor is inversely proportional to its:

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50. The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

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51. Which one of the following is an ohmic conductor?

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52. Water is not suitable as a calorimetric substance because it :

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53. A periscope works by the principle of

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54. The temperature which has the same reading on both Fahrenheit and Celsius scales is

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55. Which elements are malleable and good conductors of electricity?

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56. Purity of a metal can be determined with the help of

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57. It is easier for a man to swim in sea water, than in river water because

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58. Which of the following has got more heat capacity ?

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59. Sources of geothermal power are

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60. What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?

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61. Steam at 100°C causes more severe burns than water at 100°C because

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62. If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

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63. When a body is immersed in a liquid, the force acting on it is

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64. What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?

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65. A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

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66. Water cannot be used to extinguish fire caused by electric current, because

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67. Water is used in car radiator because of its

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68. When a steel ball is placed on the surface of mercury, it does not sink because

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69. To convert temperature from Celcius to Kelvin scale, you must ________ the given temperature.

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70. A balloon filled with hydrogen will

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71. The apparent weight of a man in a lift is less the real weight when :

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72. What is the SI unit of temperature?

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73. In total internal reflection, the light travel from

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74. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as

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75. Total internal reflection can not take place when light goes from :

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76. The snow on the mountains does not melt all at once when it is heated by the sun because:

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77. A convex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :

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78. A piece of wood is held under water. The upthrust on it will be:

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79. Q = mcdT refers to

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80. 0°K is equivalent to

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81. No current will flow between two charged bodies if they have the same

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82. The type of mirror used in automobiles to see the traffic on the rear side is

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83. Which of the following produces more severe burns ?

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84. A hydrogen balloon floats up because of

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85. When a number of resistors are connected in series in a circuit, the value of current:

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86. Which of the following represents a relation for ”heat lost = heat gained’?

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87. A mirage occurs because of

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88. Heat stored in water vapour is

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89. What is the principle of a ”Life Jacket”?

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90. Water pipes in hilly areas often burst on a cold frosty night, because

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91. Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.

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92. A boat will submerge when it displaces water equal to its own:

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93. A rear-view mirror for driving is

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94. Optical Fibre technology works on which of these principles of Physics?

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95. The reflector of a search light is a :

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96. On the Kelvin scale, the melting point of ice is

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97. At what temperature (in degree Celsius), the numerical values on Celsius and Fahrenheit scales become equal?

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98. Purity of a metal can be determined with the help of

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99. Which one of the following has the highest value of specific heat?

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100. After reflection from a plane mirror the word will look like.

 

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