MCQOPTIONS
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MCQOPTIONS
This section includes 1292 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is |
| A. | F/25 |
| B. | 5F |
| C. | F/5 |
| D. | 25F |
| Answer» E. | |
| 52. |
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_x005F_x000D_ |
| A. | 2R |
| B. | R/2 |
| C. | 5R/4 |
| D. | 3R/4 |
| Answer» D. 3R/4 | |
| 53. |
Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? |
| A. | K1k2/k1+k2 |
| B. | 2k1k2/k1+k2 |
| C. | K1+k2/k1k2 |
| D. | None |
| Answer» C. K1+k2/k1k2 | |
| 54. |
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) |
| A. | the gold piece will weigh more |
| B. | the silver piece will weighmore |
| C. | both silver and gold pieces weigh equal |
| D. | weighing will depend on their masses |
| Answer» C. both silver and gold pieces weigh equal | |
| 55. |
Two identical resistors of 20 ohm each are connected in parallel. This combination, in turn, is connected to a 10 ohm resister. The equivalent resistance of the combination will be |
| A. | 30 ohm |
| B. | 10 ohm |
| C. | 5 ohm |
| D. | 20 ohm |
| Answer» B. 10 ohm | |
| 56. |
Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___. |
| A. | 30 ohm |
| B. | 5 ohm |
| C. | 15 ohm |
| D. | 10 ohm |
| Answer» D. 10 ohm | |
| 57. |
Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then |
| A. | the brighter bulb has smaller resistance |
| B. | the brighter bulb has larger resistance |
| C. | both the bulbs have the same resistance |
| D. | none of these |
| Answer» B. the brighter bulb has larger resistance | |
| 58. |
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse? |
| A. | 25 W |
| B. | Both |
| C. | 100 W |
| D. | Neither |
| Answer» B. Both | |
| 59. |
Two bodies A and B are of same mass and same amount of heat is given to both of them. If the temperature of A increases more than that of B because of heat addition, then_x005F_x000D_ |
| A. | the specific heat capacity of A is more than that of B |
| B. | the specific heat capacity of A is less than that of B |
| C. | both A and B have the same specific heat capacity but A has greater thermal conductivity |
| D. | both A and B the same specific heat capacity but B has greater thermal conductivity |
| Answer» C. both A and B have the same specific heat capacity but A has greater thermal conductivity | |
| 60. |
Two balls of steel having mass of 5 kg and 10kg each possess equal kinetic energy. Which ball is moving faster, if at all? |
| A. | Kinetic energy does not depend upon the speed of the body |
| B. | The 5 kg ball is moving faster |
| C. | Both the balls are moving at the same speed |
| D. | The 10 kg ball is moving faster |
| Answer» C. Both the balls are moving at the same speed | |
| 61. |
Total internal reflection can take place when light travels from |
| A. | Air to glass |
| B. | Air to water |
| C. | Water to glass |
| D. | Diamond to glass |
| Answer» E. | |
| 62. |
Transformer is a device to convert |
| A. | D.C. to A.C. |
| B. | Low voltage D.C. into high voltage D.C. |
| C. | Low voltage A.C. into high voltage A.C. |
| D. | Mechanical energy into Electrical energy |
| Answer» B. Low voltage D.C. into high voltage D.C. | |
| 63. |
'Torr' is a unit of _______._x005F_x000D_ |
| A. | force_x005F_x000D_ |
| B. | energy_x005F_x000D_ |
| C. | power_x005F_x000D_ |
| D. | pressure |
| Answer» E. | |
| 64. |
To resolve an object in an electron microscope, |
| A. | the wavelength of the electrons must be close to the diameter of the object |
| B. | the wavelength of the electrons must be greater than the diameter of the object. |
| C. | Both A & B |
| D. | None of the above |
| Answer» B. the wavelength of the electrons must be greater than the diameter of the object. | |
| 65. |
To produce deflection in a television picture tube: |
| A. | an electric field is used |
| B. | a magnetic field is used |
| C. | both electric and magnetic field are used |
| D. | none of the above |
| Answer» C. both electric and magnetic field are used | |
| 66. |
To hear a distinct echo the time interval between the original sound and the reflected sound must be at least |
| A. | 0.2 second |
| B. | 1 second |
| C. | 0.1 second |
| D. | 2 seconds |
| Answer» D. 2 seconds | |
| 67. |
To pinpoint a Criminal, Forensic Department uses the technique called? |
| A. | DNA Editing |
| B. | DNA Splicing |
| C. | DNA Fingerprinting |
| D. | DNA Amplification |
| Answer» D. DNA Amplification | |
| 68. |
To convert temperature from Celcius to Kelvin scale, you must ___ the given temperature. |
| A. | subtract 273 |
| B. | multiply 273 |
| C. | add 273 |
| D. | divide by 273 |
| Answer» D. divide by 273 | |
| 69. |
Time period of a seconds pendulum is |
| A. | 2 seconds |
| B. | 4 seconds |
| C. | 1 seconds |
| D. | 0 seconds |
| Answer» B. 4 seconds | |
| 70. |
Through which light cannot pass? |
| A. | Notebook paper |
| B. | Water |
| C. | Book |
| D. | Sun glasses |
| Answer» D. Sun glasses | |
| 71. |
_x005F_x000D_ Three resistors are arranged in a circuit as shown above. The battery has an unknown but constant emf ε and a negligible internal resistance._x005F_x000D_ Now, determine the equivalent resistance of the three resistors. |
| A. | 12 Ω |
| B. | 10 Ω |
| C. | 16 Ω |
| D. | 15 Ω |
| Answer» B. 10 Ω | |
| 72. |
Through which does light travel best? |
| A. | water |
| B. | air |
| C. | vacuum |
| D. | none |
| Answer» D. none | |
| 73. |
This is NOT a use of a concave mirror? |
| A. | As rear view mirrors |
| B. | In torches |
| C. | As shaving mirrors |
| D. | In headlights |
| Answer» B. In torches | |
| 74. |
Thermohaline circulation is mainly due to |
| A. | cold, dense ocean water sinking and warmer water replacing it |
| B. | winds causing circulation of ocean water |
| C. | warmer, less dense water sinking in the ocean and cold water replacing it |
| D. | warm water being added to the ocean due to industial waste |
| Answer» B. winds causing circulation of ocean water | |
| 75. |
The work done to increase the velocity of a car of 800 kg from 5 m/s to 10 m/s is_x005F_x000D_ Â _x005F_x000D_ |
| A. | 20 kJ |
| B. | 10 kJ |
| C. | 40 kJ |
| D. | 30 kJ |
| Answer» E. | |
| 76. |
The working of the quartz crystal in the watch is based on the |
| A. | Piezo - electric Effect |
| B. | Edison Effect |
| C. | Photoelectric Effect |
| D. | Johnson Effect |
| Answer» B. Edison Effect | |
| 77. |
The working principle of a washing machine is |
| A. | reverse osmosis |
| B. | diffusion |
| C. | centrifugation |
| D. | dialysis |
| Answer» D. dialysis | |
| 78. |
The work done by friction is not lost but is transferred as .......... energy._x005F_x000D_ |
| A. | chemical |
| B. | frictional |
| C. | nuclear |
| D. | heat |
| Answer» E. | |
| 79. |
The work done in one complete revolution of the moon around the earth is equal to |
| A. | centripetal force x radius of the orbit of the moon |
| B. | gravitational force x circumference of the orbit of the moon |
| C. | gravitational force x diameter of the orbit of the moon |
| D. | zero |
| Answer» E. | |
| 80. |
The wavelike properties of electrons are useful in |
| A. | Magnifying objects |
| B. | Lasers |
| C. | Weather reports |
| D. | All of the above |
| Answer» B. Lasers | |
| 81. |
The weight of a boy on the surface of the moon is 300 N. The weight of the same boy on the surface of the earth will be |
| A. | 300 N |
| B. | 50 N |
| C. | 1800 N |
| D. | 5 N |
| Answer» D. 5 N | |
| 82. |
The work done by centripetal force is ______. |
| A. | positive |
| B. | zero |
| C. | negative |
| D. | unity |
| Answer» C. negative | |
| 83. |
The washing machine works on the principle of ____________ |
| A. | Dialysis |
| B. | Diffusion |
| C. | Reverse osmosis |
| D. | Centrifugation |
| Answer» E. | |
| 84. |
The wavelength of a wave is the distance between |
| A. | Crest and Trough |
| B. | Crest and Crest |
| C. | Trough and Trough |
| D. | Both B & C |
| Answer» E. | |
| 85. |
The volume of air delivered by the compressor is called |
| A. | Compressor capacity |
| B. | Swept volume |
| C. | Free air delivery |
| D. | None of these |
| Answer» B. Swept volume | |
| 86. |
The velocity required to place a vehicle in orbit round the moon is _______ that required to place it in orbit round the earth |
| A. | less than |
| B. | Greater than |
| C. | equal to |
| D. | greater than or equal to |
| Answer» B. Greater than | |
| 87. |
The velocity of light in vacuum is |
| A. | 3 x 108 m/s |
| B. | 2 x 108 m/s |
| C. | 3 x 107 m/s |
| D. | 3 x 106 m/s |
| Answer» B. 2 x 108 m/s | |
| 88. |
The value of g on the moon is 1/6th of the value of g on the earth. If a man can jump 1.5 m high on the earth, on the moon, be can jump up to a height of |
| A. | 4.5 m |
| B. | 9 m |
| C. | 6 m |
| D. | 7.5 m |
| Answer» C. 6 m | |
| 89. |
The value of universal gravitation constant (G) was determined by |
| A. | Henry Cavendish |
| B. | Antoine L Lavoisier |
| C. | Isaac Newton |
| D. | John Dalton |
| Answer» B. Antoine L Lavoisier | |
| 90. |
The value of acceleration due to gravity (g) at a distance of 2R from the surface of earth, where R is the radius of earth is ______. |
| A. | g/3 |
| B. | g/4 |
| C. | g/9 |
| D. | g/2 |
| Answer» D. g/2 | |
| 91. |
The value of acceleration due to gravity (g) ____._x005F_x000D_ |
| A. | is greater at the poles than at the equator |
| B. | is lesser at the poles than at the equator |
| C. | is greater at the North pole than at the South pole |
| D. | is greater at the South pole than at the North pole |
| Answer» B. is lesser at the poles than at the equator | |
| 92. |
The unit of which physical quantity is not pascal? |
| A. | Moment of inertia |
| B. | Pressure |
| C. | Stress |
| D. | Young's modulus |
| Answer» B. Pressure | |
| 93. |
The unit of power used in industry is |
| A. | Joule |
| B. | Watts |
| C. | Horse power |
| D. | Kilowatts |
| Answer» D. Kilowatts | |
| 94. |
The unit of momentum is_x005F_x000D_ |
| A. | Kgms2 |
| B. | Kgms-1 |
| C. | Kgms |
| D. | Kgms-2 |
| Answer» C. Kgms | |
| 95. |
The time taken by a pendulum to complete one oscillation is called its? |
| A. | Maximum speed |
| B. | Average speed |
| C. | Time period |
| D. | Time interval |
| Answer» D. Time interval | |
| 96. |
The transport phenomenon occurs only in _____ state of a gas and is ______ |
| A. | Non-equilibrium, irreversible |
| B. | Non-equilibrium, reversible |
| C. | equilibrium, irreversible |
| D. | equilibrium, reversible |
| Answer» D. equilibrium, reversible | |
| 97. |
The unit for measuring electric power is the |
| A. | Steridian |
| B. | Watts |
| C. | Watts |
| D. | Volts |
| Answer» D. Volts | |
| 98. |
The unit of measurement of noise is |
| A. | Decibel |
| B. | Hertz |
| C. | Amplifier |
| D. | Acoustics |
| Answer» B. Hertz | |
| 99. |
The thrust exerted by a body on a surface = ?_x005F_x000D_ |
| A. | the volume of the body |
| B. | the density of the body |
| C. | the weight of the body |
| D. | the mass of the body |
| Answer» D. the mass of the body | |
| 100. |
The term photon refers to |
| A. | light ray |
| B. | sub atomic particle |
| C. | radiation |
| D. | None of the above |
| Answer» C. radiation | |