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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. Water is used in car radiator because of its

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2. Brightness of bulb depends on voltage or current?

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

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

 

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6. A periscope works by the principle of

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

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

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

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10. An optically plane surface reflects a beam of light

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11. Optical fibres are based on the phenomenon of

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

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

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15. 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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16. Shaving mirror is

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

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18. Absolute Zero is defined as

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

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

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21. A fresh egg when placed in salt water will

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22. The phenomenon which causes mirage is

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

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

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

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

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

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29. Sources of geothermal power are

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

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

 

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32. A good conductor while carrying current is

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

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34. A periscope works on the principle of

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

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

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

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

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

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40. A rear-view mirror for driving is

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41. When a ship enters the sea from a river

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

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

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

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

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47. A balloon filled with hydrogen will

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

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49. A mirage occurs because of

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50. 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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51. Convex mirror is generally used in ________

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

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53. What is the SI unit of temperature?

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

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

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

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

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

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

 

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

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

 

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

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63. Buoyancy depends on

 

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

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

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

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67. 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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68. Which one of the following is an ohmic conductor?

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

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

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

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73. The reflector of a search light is a :

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

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

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76. Q = mcdT refers to

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

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

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79. 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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80. In total internal reflection, the light travel from

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

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

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

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

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

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86. Heat stored in water vapour is

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

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

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89. Clouds float in the atmosphere because of their

 

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

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

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92. 0°K is equivalent to

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

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

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

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

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

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

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99. Which of the following produces more severe burns ?

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100. A hydrogen balloon floats up because of

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