MCQOPTIONS
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MCQOPTIONS
This section includes 563 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to |
| A. | reflection |
| B. | refraction |
| C. | forced vibrations |
| D. | damped vibrations |
| Answer» D. damped vibrations | |
| 52. |
Sound energy passing per second through a unit area held perpendicular is called - |
| A. | Intensity |
| B. | Frequency |
| C. | Amplitude |
| D. | Quality |
| Answer» B. Frequency | |
| 53. |
Velocity of the sound is minimum in - |
| A. | Steel |
| B. | Vacuum |
| C. | Water |
| D. | Air |
| Answer» C. Water | |
| 54. |
Speed of sound in air is unaffected by change in : |
| A. | Pressure |
| B. | Humidity |
| C. | Temperature |
| D. | Volume |
| Answer» B. Humidity | |
| 55. |
Which of the following waves cannot be polarized? |
| A. | Radio |
| B. | Ultra violet |
| C. | Infrared |
| D. | Ultrasonic |
| Answer» E. | |
| 56. |
Which of these waves can be polarized? |
| A. | Sound waves in air |
| B. | Longitudinal waves on a string |
| C. | Transverse waves on a string |
| D. | Light waves |
| Answer» E. | |
| 57. |
An amplifier is said to suffer from distortion when its output is - |
| A. | low |
| B. | different from input |
| C. | noisy |
| D. | larger than its input |
| Answer» D. larger than its input | |
| 58. |
If in a motion, the axis of the rotation does not pass through the object, then the motion is called - |
| A. | Spin motion |
| B. | Oscillatory motion |
| C. | Translatory motion |
| D. | Orbital motion |
| Answer» E. | |
| 59. |
Which waves cannot be transmitted through vacuum - |
| A. | Light |
| B. | Heat |
| C. | Sound |
| D. | Electromagnetic |
| Answer» D. Electromagnetic | |
| 60. |
These waves cannot be trans-mitted through vacuum |
| A. | Light |
| B. | Sound |
| C. | Heat |
| D. | Electromagnetic |
| Answer» C. Heat | |
| 61. |
For a ray of light to suffer total internal reflection it has to pass from |
| A. | glass to water |
| B. | water to glass |
| C. | air to water |
| D. | air to glass |
| Answer» D. air to glass | |
| 62. |
Which of the following is used to split white light into different colors? |
| A. | Glass slab |
| B. | Convex lens |
| C. | Concave lens |
| D. | Prism |
| Answer» E. | |
| 63. |
Nuclear reactors used to produce electricity are based on |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | Cold fusion |
| D. | Superconductivity |
| Answer» B. Nuclear fusion | |
| 64. |
Energy that is produced commercially from coal is called |
| A. | Light energy |
| B. | Kinetic energy |
| C. | Thermal energy |
| D. | Potential energy |
| Answer» D. Potential energy | |
| 65. |
Which one of the following is not a function of the liver? |
| A. | Regulation of blood sugar |
| B. | Enzyme activation |
| C. | Detoxiation |
| D. | Reproduction |
| Answer» E. | |
| 66. |
Automatic wrist watches get energy from - |
| A. | twist in spring |
| B. | liquid crystal |
| C. | kinetic energy |
| D. | movement of our hands |
| Answer» B. liquid crystal | |
| 67. |
Which among the following is not a characteristic of transition metals? |
| A. | Tendency to gain electrons |
| B. | Low electro negativity |
| C. | Low ionization energy |
| D. | Malleability |
| Answer» B. Low electro negativity | |
| 68. |
The source of the Sun's energy is the process of |
| A. | Photoelectric emission |
| B. | Nuclear fission |
| C. | Nuclear fusion |
| D. | Thermionic emission |
| Answer» D. Thermionic emission | |
| 69. |
A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be - |
| A. | a parabola |
| B. | a horizontal straight line |
| C. | a vertical straight line |
| D. | a circle |
| Answer» B. a horizontal straight line | |
| 70. |
Which of the following is a nonrenewable source of energy? |
| A. | Biogas |
| B. | Solar |
| C. | Wind |
| D. | Coal |
| Answer» E. | |
| 71. |
The term Isoneph' indicates the lines of equal |
| A. | cloudiness |
| B. | salinity |
| C. | rainfall |
| D. | pressure |
| Answer» B. salinity | |
| 72. |
The type of mirrors used in the headlamp of cars is |
| A. | Parabolic concave |
| B. | Plane |
| C. | Spherical convex |
| D. | Cylindrical concave |
| Answer» B. Plane | |
| 73. |
The filament of electric bulb is made up of : |
| A. | Copper |
| B. | Nichrome |
| C. | Lead |
| D. | Tungsten |
| Answer» E. | |
| 74. |
The rate of transfer of charges through a circuit is called? |
| A. | Potential Difference |
| B. | Resistance |
| C. | Current |
| D. | Energy |
| Answer» D. Energy | |
| 75. |
If lift is going up with acceleration, the apparent weight of a body is - |
| A. | may be more or less than true weight |
| B. | equal to the true weight |
| C. | less than the true weight |
| D. | more than the true weight |
| Answer» E. | |
| 76. |
Electricians use rubber gloves while working because - |
| A. | rubber is an insulator |
| B. | rubber is a good conductor |
| C. | wearing rubber gloves is mandatory |
| D. | rubber makes work easy |
| Answer» B. rubber is a good conductor | |
| 77. |
Mud houses are cooler in summers and wanner in winters as compared to brick houses because |
| A. | mud is a good conductor |
| B. | mud is a bad conductor |
| C. | mud is a poor insulator |
| D. | evaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters |
| Answer» C. mud is a poor insulator | |
| 78. |
An Athlets runs before long jump to get advantage on |
| A. | Inertia of motion |
| B. | Frictional force |
| C. | Moment of a force |
| D. | Principle of moments |
| Answer» B. Frictional force | |
| 79. |
In sunlight, a rose appears red. In green light, the same rose appears |
| A. | red |
| B. | black |
| C. | green |
| D. | yellow |
| Answer» C. green | |
| 80. |
Speed of sound in air depends on the - |
| A. | Chemical conditions |
| B. | Physical conditions |
| C. | Pitch |
| D. | None of these |
| Answer» C. Pitch | |
| 81. |
Longitudinal waves and Transverse waves are types of - |
| A. | Mechanical waves |
| B. | Non-Mechanical waves |
| C. | Both of above |
| D. | None of Above |
| Answer» B. Non-Mechanical waves | |
| 82. |
Lognitudinal waves and Transverse waves are types of - |
| A. | Mechanical waves |
| B. | Non-Mechanical waves |
| C. | Both of above |
| D. | None of Above |
| Answer» B. Non-Mechanical waves | |
| 83. |
Sound waves in air are . |
| A. | transverse |
| B. | longitudinal |
| C. | electromagnetic |
| D. | polarised |
| Answer» C. electromagnetic | |
| 84. |
Sound and light waves both . |
| A. | have similar wavelength |
| B. | obey the laws of reflection |
| C. | travel as longitudinal waves |
| D. | travel through vacuum |
| Answer» C. travel as longitudinal waves | |
| 85. |
Least audible sound for most of the human ear is |
| A. | 10.0 bar |
| B. | 0.0002 bar |
| C. | 0.005 bar |
| D. | 5.0 bar |
| Answer» C. 0.005 bar | |
| 86. |
Ultrasonic waves are produced by making use of - |
| A. | ferro magnetic material |
| B. | ferri magnetic material |
| C. | piezo electric material |
| D. | pyro electrical material |
| Answer» D. pyro electrical material | |
| 87. |
A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear |
| A. | Black |
| B. | White |
| C. | Grey |
| D. | Opaque |
| Answer» C. Grey | |
| 88. |
"Tice splitting of different colours of light in a prism is : |
| A. | Reflection of light |
| B. | Dispersion light |
| C. | Diffraction light |
| D. | Refraction of light |
| Answer» C. Diffraction light | |
| 89. |
Gas thermometers are more sensitive than the liquid thermometers because of the gases - |
| A. | have low specific heat |
| B. | have high specific heat |
| C. | have large coefficient of expansion |
| D. | are lighter |
| Answer» B. have high specific heat | |
| 90. |
Alcohol is more volatile than water because is lower than water. |
| A. | its boiling point |
| B. | its density |
| C. | its viscosity |
| D. | its surface tension |
| Answer» B. its density | |
| 91. |
The redness in atmosphere at Sunrise and Sunset is due to |
| A. | Refraction of light |
| B. | Reflection of light |
| C. | Dispersion of light |
| D. | Scattering of light |
| Answer» E. | |
| 92. |
Steel is more elastic than rubber because it |
| A. | requires larger deforming force |
| B. | Is never deformed |
| C. | is deformed very easily |
| D. | is harder than rubber |
| Answer» D. is harder than rubber | |
| 93. |
Steam at 100 C causes more severe burns than water at 100 C because |
| A. | steam has no specific heat capacity |
| B. | steam has latent heat of vaporization |
| C. | water has no specific heat capacity |
| D. | water has latent heat of fusion |
| Answer» C. water has no specific heat capacity | |
| 94. |
What is the range of mercury thermometer? |
| A. | 0 degree Celsius to 350 degree Celsius |
| B. | -10 degree Celsius to 350 degree Celsius |
| C. | -20 degree Celsius to 350 degree Celsius |
| D. | -30 degree Celsius to 350 degree Celsius |
| Answer» E. | |
| 95. |
The atmospheric layer reflecting radio waves is called |
| A. | Ozonosphere |
| B. | Ionosphere |
| C. | Stratosphere |
| D. | Mesosphere |
| Answer» C. Stratosphere | |
| 96. |
In mirrors the back surface is coated with a thin layer of |
| A. | Mercury |
| B. | Silver |
| C. | Red oxide |
| D. | Silver nitrate |
| Answer» C. Red oxide | |
| 97. |
The layer of atmosphere used for radio- wave transmission is |
| A. | chromosphere |
| B. | troposphere |
| C. | ionosphere |
| D. | stratosphere |
| Answer» D. stratosphere | |
| 98. |
The stability of a pond ecosystem depends on - |
| A. | micro-organisms and fishes |
| B. | micro-organisms and zoo planktons |
| C. | fishes and reptiles |
| D. | producers and consumers |
| Answer» E. | |
| 99. |
The reason for a swimming pool to appear less deep than the actual depth is |
| A. | Refraction |
| B. | Light scattering |
| C. | Reflection |
| D. | Interference |
| Answer» B. Light scattering | |
| 100. |
Sun appears red in colour at sun-rise and sunset due to |
| A. | the fact that sun emits only red colour at that time |
| B. | red light having longer wave length scatters away |
| C. | that sun Comes out of the mountains |
| D. | that all other colours scatter away except red |
| Answer» E. | |