MCQOPTIONS
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MCQOPTIONS
This section includes 90 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which of the following is true about working of a photo diode? |
| A. | It is operated under reverse bias |
| B. | It is operated under forward bias |
| C. | Both a and b |
| D. | None |
| Answer» B. It is operated under forward bias | |
| 52. |
Which of the following is correct about mechanical waves? |
| A. | they require a medium to propagate |
| B. | they don’t require a medium to propagate |
| C. | may or may not require a medium to propagate |
| D. | None of the above |
| Answer» B. they don’t require a medium to propagate | |
| 53. |
Which of the following is the efficiency of a Carnot engine(a = Temperature of source, b=Temperature of sink)? |
| A. | 1 – b/a |
| B. | 1 – a/b |
| C. | 1 + b/a |
| D. | 1 + a/b |
| Answer» B. 1 – a/b | |
| 54. |
What is the relation between velocity and acceleration at the highest point of projectile path? |
| A. | both are at an angle of 45° to each other |
| B. | both are perpendicular to each other |
| C. | both are at an angle of 180° to each other |
| D. | None of the above |
| Answer» C. both are at an angle of 180° to each other | |
| 55. |
Two vectors are said to be equal if: |
| A. | they have equal magnitude and same direction |
| B. | they have equal magnitude and opposite direction |
| C. | they have equal magnitude and common initial point |
| D. | they have equal magnitude irrespective of the direction |
| Answer» B. they have equal magnitude and opposite direction | |
| 56. |
Which of the following states of matter has the weakest Intermolecular forces? |
| A. | Solids |
| B. | Liquids |
| C. | Gases |
| D. | It is same in solids, liquids and gases |
| Answer» D. It is same in solids, liquids and gases | |
| 57. |
What is the ratio of the change in collector current to the change in base current at a constant collector-emitter voltage, when the common emitter transistor is in active state, known as? |
| A. | Input resistance |
| B. | Output resistance |
| C. | Current amplification factor |
| D. | None of the above |
| Answer» D. None of the above | |
| 58. |
What is the wavelength range of Radio waves? |
| A. | between 400 nm and 800 nm |
| B. | between 1 nm and 10-3 nm |
| C. | more than 0.1 m |
| D. | None of the above |
| Answer» D. None of the above | |
| 59. |
What do we call the process in which no exchange of heat energy takes place between the gas and the surroundings? |
| A. | Adiabatic |
| B. | Isothermal |
| C. | Isochoric |
| D. | Isobaric |
| Answer» B. Isothermal | |
| 60. |
The magnitude of the resultant of two vectors is maximum in which of the following case? |
| A. | when vectors act in the same direction |
| B. | when vectors act in the opposite direction |
| C. | when vectors act at 90° to each other |
| D. | None of the above |
| Answer» B. when vectors act in the opposite direction | |
| 61. |
The motion of an object under free fall is an example of which of the following? |
| A. | uniform velocity |
| B. | uniform acceleration |
| C. | zero acceleration |
| D. | non-uniform acceleration |
| Answer» C. zero acceleration | |
| 62. |
What is the effect of increase in radius of orbit on the binding energy of a satellite? |
| A. | it increases |
| B. | it decreases |
| C. | It remains the same |
| D. | None of the above |
| Answer» C. It remains the same | |
| 63. |
What happens to the resistance of a p-n junction diode when forward biased? |
| A. | it becomes high |
| B. | No effect |
| C. | it becomes low |
| D. | it becomes zero |
| Answer» D. it becomes zero | |
| 64. |
What do we call the wave if the constituents of the medium oscillate perpendicular to the direction of wave propagation? |
| A. | Transverse wave |
| B. | Longitudinal wave |
| C. | Electromagnetic wave |
| D. | Matter wave |
| Answer» B. Longitudinal wave | |
| 65. |
Which of the following is correct about the rate of loss of heat of the body, as per the Newton’s law of cooling? |
| A. | It is directly proportional to the difference of body’s temperature and the surroundings |
| B. | It is inversely proportional to the difference of body’s temperature and the surroundings |
| C. | It is equal to the difference of body’s temperature and the surroundings |
| D. | None of the above |
| Answer» B. It is inversely proportional to the difference of body’s temperature and the surroundings | |
| 66. |
Which of the these physical quantities is a vector quantity? |
| A. | Temperature |
| B. | Speed |
| C. | Gravitational Intensity |
| D. | Work |
| Answer» D. Work | |
| 67. |
Which of the following units is NOT used for measuring length? |
| A. | Astronomical Unit |
| B. | Light year |
| C. | Par sec |
| D. | slug |
| Answer» E. | |
| 68. |
An orbital velocity of a satellite does not depend on which of the following? |
| A. | Radius of the planet |
| B. | Mass of the planet |
| C. | Radius of orbit |
| D. | Mass of the satellite |
| Answer» E. | |
| 69. |
What is meant by Atomic number of an atom? |
| A. | total number of protons |
| B. | total number of electrons in an uncharged atom |
| C. | Both a and b |
| D. | None |
| Answer» D. None | |
| 70. |
Which of these is NOT an example of Periodic motion? |
| A. | Revolution of earth around the sun |
| B. | Rotation of earth about its polar axis |
| C. | Motion of minute’s hand of a clock |
| D. | None of the above |
| Answer» E. | |
| 71. |
What do we call the temperature and pressure at which solid, liquid, and vapor phases of a particular substance coexist in equilibrium? |
| A. | Equilibrium point |
| B. | Triple point |
| C. | Normal point |
| D. | None of the above |
| Answer» C. Normal point | |
| 72. |
Power of lens is measured in which of the following units? |
| A. | metre |
| B. | dioptre |
| C. | lumen |
| D. | watt |
| Answer» C. lumen | |
| 73. |
Which of the following scientific discoveries was made by C.V Raman? |
| A. | Inelastic scattering of light by molecules |
| B. | Super Conductivity |
| C. | Controlled nuclear fission |
| D. | Cyclotron |
| Answer» B. Super Conductivity | |
| 74. |
In comparison to the gravitational force the earth exerts on the moon, the gravitational force the moon exerts on earth ________? |
| A. | will be greater |
| B. | will be lesser |
| C. | will be same |
| D. | None of the above |
| Answer» D. None of the above | |
| 75. |
What is Mass defect of a nucleus? |
| A. | difference between mass of a nucleus and its constituents |
| B. | sum of the mass of a nucleus and its constituents |
| C. | difference between mass of a neutron and mass of proton |
| D. | sum of mass of a neutron and mass of proton |
| Answer» B. sum of the mass of a nucleus and its constituents | |
| 76. |
In which of the following positions is the potential energy minimum in S.H.M? |
| A. | Extreme position |
| B. | Mean position |
| C. | can be at extreme or mean position |
| D. | None of the above |
| Answer» C. can be at extreme or mean position | |
| 77. |
What is the value of universal gas constant? |
| A. | 2.31 J mol-1 K–1 |
| B. | 4.31 J mol-1 K–1 |
| C. | 6.31 J mol-1 K–1 |
| D. | 8.31 J mol-1 K–1 |
| Answer» E. | |
| 78. |
Which of the following branch of Physics deal with study of Atomic Nuclei? |
| A. | Nuclear Physics |
| B. | Bio Physics |
| C. | Atomic Physics |
| D. | None of the above |
| Answer» B. Bio Physics | |
| 79. |
Which of the following is/are part of the Classical Physics? |
| A. | Optics |
| B. | Thermodynamics |
| C. | Both a and b |
| D. | None |
| Answer» D. None | |
| 80. |
The value of acceleration due to gravity is minimum on which of these planets? |
| A. | Mars |
| B. | Jupiter |
| C. | Mercury |
| D. | Neptune |
| Answer» D. Neptune | |
| 81. |
What is the relationship between the magnetisation of a paramagnetic material and the absolute temperature? |
| A. | they are directly proportional to each other |
| B. | they are inversely proportional to each other |
| C. | they are independent of each other |
| D. | None |
| Answer» C. they are independent of each other | |
| 82. |
Which of the following about S.H.M is correct? |
| A. | In S.H.M. acceleration is maximum at extreme position |
| B. | In S.H.M. velocity is minimum at extreme position |
| C. | Both a and b |
| D. | None of the above |
| Answer» D. None of the above | |
| 83. |
Which of the following sounds is produced by earthquakes before the main shock waves? |
| A. | low-frequency infrasound |
| B. | high-frequency ultrasound |
| C. | sounds between 200 Hz and 400 Hz |
| D. | None of the above |
| Answer» B. high-frequency ultrasound | |
| 84. |
Who was the first scientist to discover Electrons? |
| A. | Albert Einstein |
| B. | Isaac Newton |
| C. | J.C. Bose |
| D. | J.J Thompson |
| Answer» E. | |
| 85. |
“Svedberg Unit” is a unit of _________? |
| A. | Concentration |
| B. | Size |
| C. | Density |
| D. | Time |
| Answer» E. | |
| 86. |
On which of the following quantities, Work done does not depend? |
| A. | Force applied |
| B. | Displacement |
| C. | Time |
| D. | Depends on all of the above |
| Answer» D. Depends on all of the above | |
| 87. |
What do we call an arrangement of two unlike poles of equal strength separated by a small distance? |
| A. | Magnetic dipole |
| B. | Solenoid |
| C. | Toroid |
| D. | Electric dipole |
| Answer» B. Solenoid | |
| 88. |
When are the two particles said to be in same phase? |
| A. | if the phase difference between them is an even multiple of π |
| B. | if the path difference is an even multiple of (λ / 2) |
| C. | if the time interval is an even multiple of (T/ 2) |
| D. | All of the above |
| Answer» E. | |
| 89. |
What is supersonic speed? |
| A. | When the speed of any object exceeds the speed of sound |
| B. | When the speed of any object exceeds the speed of light |
| C. | When the speed of any object exceeds 10000 m/s |
| D. | None of the above |
| Answer» B. When the speed of any object exceeds the speed of light | |
| 90. |
What is the range of masses involved in the study of Physics? |
| A. | 10-19 kg to 1038 kg |
| B. | 10-30 kg to 1055kg |
| C. | 10-30 kg to 1030kg |
| D. | 10-19 kg to 1055 kg |
| Answer» C. 10-30 kg to 1030kg | |