MCQOPTIONS
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MCQOPTIONS
This section includes 754 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Work done by variable force is determine by dividing____________________? |
| A. | force into small interval |
| B. | displacement into small interval |
| C. | both force and displacement into small intervals |
| D. | force into small and displacement into large intervals |
| Answer» C. both force and displacement into small intervals | |
| 52. |
Work done on the body equals to the _____________________? |
| A. | change in its K.E always |
| B. | change in its P.E always |
| C. | change in its K.E and change in its P.E |
| D. | neither change in K.E and nor change in its P.E |
| Answer» D. neither change in K.E and nor change in its P.E | |
| 53. |
Work done will be maximum if the angle between the force F and displacement d is______________________? |
| A. | 45° |
| B. | 90° |
| C. | 180° |
| D. | 0° |
| Answer» E. | |
| 54. |
Work has the dimension as that of same as that of__________________? |
| A. | torque |
| B. | angular momentum |
| C. | linear momentum |
| D. | power |
| Answer» B. angular momentum | |
| 55. |
X-ray are________________? |
| A. | of unknown nature |
| B. | high energy electrons |
| C. | high energy photons |
| D. | radio isotopes |
| Answer» D. radio isotopes | |
| 56. |
X-rays are electromagnetic waves like________________? |
| A. | Light waves |
| B. | Heat waves |
| C. | Microwaves |
| D. | γ-rays |
| Answer» E. | |
| 57. |
X-rays are diffracted by a crystal but not by a diffraction grating because_____________? |
| A. | The ions in a crystal are well arranged |
| B. | The lines in a diffraction grating cannot reflect X-rays. |
| C. | The penetration power of X-rays is high in a diffraction grating |
| D. | The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal |
| Answer» E. | |
| 58. |
X-rays are similar in nature to_______________? |
| A. | Cathode rays |
| B. | Positive rays |
| C. | γ-rays |
| D. | Beta rays |
| Answer» D. Beta rays | |
| 59. |
Zero error of the instrument is a type of_________________? |
| A. | Random error |
| B. | Personal error |
| C. | Systematic error |
| D. | Classified error |
| Answer» D. Classified error | |
| 60. |
Which of the following radiations are suitable for the treatment of an infection in the interior of the body ? |
| A. | α-rays |
| B. | β-rays |
| C. | γ-rays |
| D. | X-rays |
| Answer» D. X-rays | |
| 61. |
Which of the following properties of molecules of a gas is same for all gases at particular temperature ? |
| A. | momentum |
| B. | mass |
| C. | velocity |
| D. | kinetic energy |
| Answer» E. | |
| 62. |
Which of the following pairs does not have identical dimensions ? |
| A. | Torque and energy |
| B. | Momentum and impulse |
| C. | Energy and work |
| D. | Mass and moment of inertia |
| Answer» E. | |
| 63. |
Which of the following pair has same direction always ? |
| A. | force, displacement |
| B. | force, velocity |
| C. | force, acceleration |
| D. | force, momentum |
| Answer» D. force, momentum | |
| 64. |
Which of the following is not derived quantity________? |
| A. | Time |
| B. | Density |
| C. | Volume |
| D. | Area |
| Answer» B. Density | |
| 65. |
Which of the following is not conservative force_________________? |
| A. | friction |
| B. | electric |
| C. | gravitational |
| D. | magnetic |
| Answer» B. electric | |
| 66. |
Which of the following is not an example of projectile motion? |
| A. | a gas filled ballon |
| B. | bullet fired from gun |
| C. | a football kicked |
| D. | a base ball shot |
| Answer» B. bullet fired from gun | |
| 67. |
Which of the following is not a correct representation method for prefixes______________? |
| A. | 1mm |
| B. | 10km |
| C. | 1000um |
| D. | Both A and B |
| Answer» D. Both A and B | |
| 68. |
Which of the following branch of Physics deals with the internal structure of earth? |
| A. | Biophysics |
| B. | Geophysics |
| C. | Plasma physics |
| D. | Atomic physics |
| Answer» C. Plasma physics | |
| 69. |
Which law of motion is also called law of inertia ? |
| A. | 1st law |
| B. | 2nd law |
| C. | 3rd law |
| D. | all 1st, 2nd and 3rd laws |
| Answer» B. 2nd law | |
| 70. |
Which is not optically active ? |
| A. | sugar |
| B. | tartaric acid |
| C. | water |
| D. | sodium chlorate |
| Answer» D. sodium chlorate | |
| 71. |
Which experiment shows that wavelength of light is smaller than that of sound___________________? |
| A. | Diffraction |
| B. | Polarization |
| C. | Interference |
| D. | Reflection |
| Answer» B. Polarization | |
| 72. |
Which equation is not dimensionally correct ? |
| A. | E=mc2 |
| B. | Vf=Vi+at |
| C. | S=Vt2 |
| D. | S=1/2at2 |
| Answer» D. S=1/2at2 | |
| 73. |
Which branch of science plays an important role in engineering? |
| A. | Biology |
| B. | Chemistry |
| C. | Physics |
| D. | All of these |
| Answer» D. All of these | |
| 74. |
Which branch of science plays an important role in the development of technology and engineering ? |
| A. | Chemistry |
| B. | Physics |
| C. | Geology |
| D. | Biology |
| Answer» C. Geology | |
| 75. |
When X-rays are passed through successive aluminum sheets what happens to their thickness ? |
| A. | increases |
| B. | it decreases |
| C. | it remains same |
| D. | sometimes increases and sometimes decreases |
| Answer» D. sometimes increases and sometimes decreases | |
| 76. |
When we excite some atoms by heat collision or electrical discharge they will________________? |
| A. | radiate electromagnetic energy with a continuous distribution of wavelength |
| B. | absorb particular wavelengths when white light is incident on them |
| C. | radiate electromagnetic energy of discrete characteristic wavelength |
| D. | emit either invisible or visible light |
| Answer» D. emit either invisible or visible light | |
| 77. |
When velocity time graph is a straight line parallel to time axis then__________________? |
| A. | acceleration is const |
| B. | acceleration is variable |
| C. | acceleration is zero |
| D. | velocity is zero |
| Answer» D. velocity is zero | |
| 78. |
When two protons are brought together_____________________? |
| A. | Kinetic energy increases |
| B. | P.E. between them increases |
| C. | P.E. between them decreases |
| D. | P.E. between tem does not change |
| Answer» C. P.E. between them decreases | |
| 79. |
When two identical traveling waves are superimposed, the velocity of the resultant wave__________________? |
| A. | decreases |
| B. | increases |
| C. | remains unchanged |
| D. | becomes zero |
| Answer» D. becomes zero | |
| 80. |
When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________? |
| A. | 5m/s, 1m/s |
| B. | 3m/s, 3m/s |
| C. | 6m/s, 1m/s |
| D. | 4m/s, 2m/s |
| Answer» B. 3m/s, 3m/s | |
| 81. |
When the speed of a moving body is doubled then___________________? |
| A. | its K.E is doubled |
| B. | its acceleration is doubled |
| C. | its P.E is doubled |
| D. | its momentum is doubled |
| Answer» E. | |
| 82. |
When the source of sound moves away form a stationary listener then ______________ occurs? |
| A. | an apparent increase in frequency |
| B. | an apparent decrease in frequency |
| C. | an apparent decrease in wavelength |
| D. | no apparent change in frequency |
| Answer» C. an apparent decrease in wavelength | |
| 83. |
When the coil of the galvanometer is in equilibrium then the deflecting couple is____________________? |
| A. | zero |
| B. | equal to the restoring couple |
| C. | greater than the restoring couple |
| D. | smaller than the restoring couple |
| Answer» C. greater than the restoring couple | |
| 84. |
When the body moves with terminal velocity the acceleration in the body become_____________? |
| A. | 0 |
| B. | Maximum |
| C. | Variable |
| D. | Infinite |
| Answer» B. Maximum | |
| 85. |
When the amplitude of a wave becomes double its energy become_________________? |
| A. | Double |
| B. | Four times |
| C. | One half |
| D. | None time |
| Answer» C. One half | |
| 86. |
When same current passes for same time through a thick and thin wire_________________? |
| A. | more heat is produced in thick wire |
| B. | more heat is produced in thin wire |
| C. | no heat is produced in wire |
| D. | less heat is produced in thick wire |
| Answer» C. no heat is produced in wire | |
| 87. |
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ? |
| A. | 5000 nm |
| B. | 5000A |
| C. | 500m |
| D. | 2000um |
| Answer» C. 500m | |
| 88. |
When light incident normally on thin film the path difference depends upon ________________? |
| A. | thickness of the film only |
| B. | nature of the film only |
| C. | angle of indidence only |
| D. | all thickness nature and angle of incidence |
| Answer» E. | |
| 89. |
When K.E energy of SHM is maximum its__________________? |
| A. | P.E is zero |
| B. | Acceleration is zero |
| C. | Restoring force is zero |
| D. | All P.E acceleration and restoring force are zero |
| Answer» E. | |
| 90. |
When fluid is incompressible then________________? |
| A. | The velocity of the fluid is constant |
| B. | The flow of the fluid is the straight line |
| C. | The density of the fluid is constant |
| D. | The volume of the fluid is constant |
| Answer» D. The volume of the fluid is constant | |
| 91. |
When crest of one wave falls over the trough of the other wave this phenomenon is known as________________? |
| A. | polarization |
| B. | constructive interference |
| C. | destructive interference |
| D. | diffraction |
| Answer» D. diffraction | |
| 92. |
When collision between the bodies in a system is inelastic in nature then for system ____________________? |
| A. | momentum changes but K.E remain conserve |
| B. | K.E changes but momentum remain conserve |
| C. | both momentum and K.E changes |
| D. | both momentum and K.E remain conserve |
| Answer» C. both momentum and K.E changes | |
| 93. |
When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to__________________? |
| A. | Centripetal force |
| B. | Gravitational force |
| C. | Their inertia |
| D. | Centrifugal force |
| Answer» E. | |
| 94. |
When body is in motion, ____________ always changes? |
| A. | its velocity |
| B. | its acceleration |
| C. | its position vector |
| D. | its momentum |
| Answer» D. its momentum | |
| 95. |
When arrow is released form its bow, its energy is transformed from _____________________? |
| A. | heat energy to K.E |
| B. | elastic P.E to K.E |
| C. | elemical energy to elastic P.E |
| D. | K.E to elastic P.E. |
| Answer» C. elemical energy to elastic P.E | |
| 96. |
When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is ___________________? |
| A. | a straight line parallel to the field |
| B. | a parabola in a plane perpendicular to the field |
| C. | a circle in a plane perpendicular to the field |
| D. | a straight line along its initial direction |
| Answer» D. a straight line along its initial direction | |
| 97. |
When A.C current passes through a capacitor then the current relationship will be_______________? |
| A. | The current lead voltage by phase angle is 90 degrees |
| B. | The voltage leads current by phase angle is 90 degrees |
| C. | The current lead voltage by phase angle is 45 degrees |
| D. | The voltage leads current by phase angle is 45 degrees |
| Answer» B. The voltage leads current by phase angle is 90 degrees | |
| 98. |
When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________? |
| A. | 2π |
| B. | π/2 |
| C. | π |
| D. | 20π |
| Answer» C. π | |
| 99. |
When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________? |
| A. | Same |
| B. | Different |
| C. | At L will be more than at C |
| D. | At L will be less than at C |
| Answer» B. Different | |
| 100. |
When a particle of charge q and mass m enters into a uniform magnetic field B moving with a velocity v perpendicular to the direction for the field it describes a circular path of radius___________________? |
| A. | R=qB/mV |
| B. | R=mV/qB |
| C. | R=qmV/B |
| D. | R=qmB/V |
| Answer» C. R=qmV/B | |