MCQOPTIONS
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MCQOPTIONS
This section includes 281 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Decibel is the unit of |
| A. | Speed of light |
| B. | Intensity of sound |
| C. | Intensity of heat |
| D. | None of these |
| Answer» C. Intensity of heat | |
| 52. |
A body is just floating in a liquid if the body is slightly pressed down and released it will |
| A. | Sink to the bottom |
| B. | Start oscillating |
| C. | Cone back to the same position immediately |
| D. | Come back to the same position slowly |
| Answer» B. Start oscillating | |
| 53. |
Number of basic S.I units is |
| A. | 4 |
| B. | 7 |
| C. | 6 |
| D. | 5 |
| Answer» C. 6 | |
| 54. |
Meniscus of mercury in a capillary is |
| A. | Concave |
| B. | Convex |
| C. | Plane |
| D. | Cylindrical |
| Answer» C. Plane | |
| 55. |
The velocity of flow of a liquid through an orifice at the bottom of a tank depends on the |
| A. | Area of the cross-section of the orifice |
| B. | Height of the liquid above the orifice |
| C. | Acceleration due to gravity |
| D. | Both (b) and (c) |
| Answer» E. | |
| 56. |
Insects can move on the surface of water without sinking due to |
| A. | Dynamic lift |
| B. | Viscosity of water |
| C. | Surface tension of water |
| D. | None of these |
| Answer» D. None of these | |
| 57. |
S.I. unit of magnetic flux is |
| A. | Weber - m |
| B. | Weber |
| C. | m |
| D. | m |
| Answer» C. m | |
| 58. |
An application of Bernoulli's equation for fluid flow is found in |
| A. | Dynamic lift of a n aeroplane |
| B. | Viscosity meter |
| C. | Capillary rise |
| D. | Hydraulic press |
| Answer» B. Viscosity meter | |
| 59. |
Two satellites are moving in the same circular orbit around the earth, they must have the same |
| A. | Mass |
| B. | Angular Momentum |
| C. | Kinetic Energy |
| D. | Speed |
| Answer» E. | |
| 60. |
Bernoulli's theorem is based on the conservation of |
| A. | Mass |
| B. | Momentum |
| C. | Energy |
| D. | All of these |
| Answer» D. All of these | |
| 61. |
Potential is measured in |
| A. | Watt |
| B. | Joule |
| C. | Coulomb |
| D. | Newton-second |
| Answer» D. Newton-second | |
| 62. |
unit of solid angle is |
| A. | Degree |
| B. | Radian |
| C. | Steradian |
| D. | Radian-second |
| Answer» D. Radian-second | |
| 63. |
Maxwell is the unit of |
| A. | Intensity of magnetization |
| B. | Permeability |
| C. | Magnetic flux |
| D. | Magnetic susceptibility |
| Answer» D. Magnetic susceptibility | |
| 64. |
The operating principle of a hydraulic press is |
| A. | Pascal's Principle |
| B. | Archimedes' principle |
| C. | Boyle's law |
| D. | Newton's law of gravitation |
| Answer» B. Archimedes' principle | |
| 65. |
SI unit of luminous intensity is |
| A. | Lumen |
| B. | Lux |
| C. | Candela |
| D. | Watt |
| Answer» D. Watt | |
| 66. |
The mass of a body on earth is 100 kg (acceleration due to gravity, ge=10m/s2). If acceleration due to gravity on the moon is ge/6, then the mass of the body on the moon is |
| A. | 100/ 6 kg |
| B. | 60 kg |
| C. | 100 kg |
| D. | 600 kg |
| Answer» D. 600 kg | |
| 67. |
Curie is the unit of |
| A. | Temperature |
| B. | Radio-activity |
| C. | Heat |
| D. | Energy |
| Answer» C. Heat | |
| 68. |
Ampere is the unit of |
| A. | Current electricity |
| B. | Magnetic field |
| C. | Electric charge |
| D. | Resistance |
| Answer» B. Magnetic field | |
| 69. |
What is the SI unit of pressure? |
| A. | Pascal |
| B. | Dyne |
| C. | Newton |
| D. | Joule |
| Answer» C. Newton | |
| 70. |
What is the SI unit of Young's modulus of elasticity? |
| A. | Dyne/cm |
| B. | Newton/m |
| C. | Newton/m |
| D. | m |
| E. | /s |
| Answer» D. m | |
| 71. |
A geostationary satellite has an orbital period of |
| A. | 2 hours |
| B. | 6 hours |
| C. | 12 hours |
| D. | 24 hours |
| Answer» E. | |
| 72. |
If the Kinetic Energy of a body is increased by 300%, its momentum will increase by |
| A. | 100% |
| B. | 150% |
| C. | 200% |
| D. | 400% |
| Answer» B. 150% | |
| 73. |
Viscosity is the property of liquids by virtue of which they |
| A. | Oppose the relative motion of its part |
| B. | Push neighbouring melecules |
| C. | Attract other molecules |
| D. | Become conducting |
| Answer» B. Push neighbouring melecules | |
| 74. |
Parasec is the unit of |
| A. | Distance |
| B. | Time |
| C. | Intensity of light |
| D. | Magnetic line |
| Answer» B. Time | |
| 75. |
With the rise of temperature, the surface tension of a liquid |
| A. | Increases |
| B. | Decreases |
| C. | Remains unchanged |
| D. | None of these |
| Answer» C. Remains unchanged | |
| 76. |
An oil drop is placed on the surface of water.It will |
| A. | Remain on the surface as a sphere |
| B. | Remain on the surface as a distorted drop |
| C. | Spread as a thin layer |
| D. | None of the above |
| Answer» D. None of the above | |
| 77. |
Water drops do not stick to the oily surface due to |
| A. | Lack of adhesive force |
| B. | Surface tension |
| C. | Cannot mix each other |
| D. | Water is lighter than oil |
| Answer» B. Surface tension | |
| 78. |
A car accelerates from rest with acceleration 1.2 m/s2. A bus moves with constant speed of 12 m/s in a parallel lane. How long does the car take from its start to meet the bus. |
| A. | 17 s |
| B. | 8 s |
| C. | 20 s |
| D. | 12 s |
| Answer» D. 12 s | |
| 79. |
Which of the following is a scalar quantity? |
| A. | Electric current |
| B. | Electric field |
| C. | Acceleration |
| D. | Linear momentum |
| Answer» B. Electric field | |
| 80. |
The equation v2 = u2 + 2 as, where the symbols have their usual meanings, follows from |
| A. | Newton's first law |
| B. | Newton's second law |
| C. | Newton's third law |
| D. | None of these |
| Answer» E. | |
| 81. |
The ratio of the inertial mass to gravitational mass is equal to |
| A. | 1 / 2 |
| B. | 1 |
| C. | 2 |
| D. | None of these |
| Answer» C. 2 | |
| 82. |
Newton's first law is also called as |
| A. | Law of moments |
| B. | Law of inertia |
| C. | Law of energy |
| D. | Law of momentum |
| Answer» C. Law of energy | |
| 83. |
The intensity of the earth's gravitational field is maximum at |
| A. | The equator |
| B. | The centre of the earth |
| C. | The pole |
| D. | None of these |
| Answer» D. None of these | |
| 84. |
'Dynamic lift' is related to |
| A. | Bernoulli's theorem |
| B. | Archimedes' principle |
| C. | Equation of continuity |
| D. | Pascal's law |
| Answer» B. Archimedes' principle | |
| 85. |
When the velocity of a body is doubled |
| A. | Its KE is doubled |
| B. | Its PE is doubled |
| C. | Its momentum is doubled |
| D. | Its acceleration is doubled |
| Answer» D. Its acceleration is doubled | |
| 86. |
The total energy of a particle vibrating in S.H.M. is proportional to the square of its |
| A. | Velocity |
| B. | Acceleration |
| C. | Amplitude |
| D. | None of these |
| Answer» D. None of these | |
| 87. |
If a bomb dropped from an aeroplane explodes in mid-air |
| A. | Its KE increases |
| B. | Its total energy decreases |
| C. | Its total energy decreases |
| D. | Its total momentum decreases |
| Answer» B. Its total energy decreases | |
| 88. |
Which of following is not a vector quantity? |
| A. | Speed |
| B. | Velocity |
| C. | Torque |
| D. | Displacement |
| Answer» B. Velocity | |
| 89. |
Unit of resistance is |
| A. | volt X ampere |
| B. | Volt |
| C. | |
| D. | volt / ampere |
| E. | ampere / volt |
| Answer» D. volt / ampere | |
| 90. |
Erg X Sec is the unit of |
| A. | Angular momentum |
| B. | Linear momentum |
| C. | Planck's constant |
| D. | Energy |
| Answer» D. Energy | |
| 91. |
Distance of stars are measured in |
| A. | Galactic unit |
| B. | Seller mile |
| C. | Cosmic kilometre |
| D. | Light year |
| Answer» E. | |
| 92. |
Which of the following is a scalar quantity? |
| A. | Displacement |
| B. | Electric field |
| C. | Acceleration |
| D. | Work |
| Answer» E. | |
| 93. |
Pick out the only vector quantity |
| A. | Pressure |
| B. | Impulse |
| C. | Gravitational potential |
| D. | Co-efficient of friction |
| Answer» C. Gravitational potential | |
| 94. |
Weightlessness experienced in spaceship is due to |
| A. | Absence of inertia |
| B. | Absence of gravity |
| C. | Absence of accelerating force |
| D. | Free fall of the spaceship |
| Answer» C. Absence of accelerating force | |
| 95. |
Pick out the only scalar quantity |
| A. | Power |
| B. | Electric fileld |
| C. | Magnetic momentum |
| D. | Average Velocity |
| Answer» B. Electric fileld | |
| 96. |
Which of the following physical quantities have the same dimensions? |
| A. | Momentum and impulse |
| B. | Power and young's modulus |
| C. | Energy and angular momentum |
| D. | Force constant and moment of inertia |
| Answer» B. Power and young's modulus | |
| 97. |
Masses of stars and galaxies are usually expressed in terms of |
| A. | Neutron mass |
| B. | Earth's mass |
| C. | Solar mass |
| D. | Lunar mass |
| Answer» D. Lunar mass | |
| 98. |
Surface tension depends on |
| A. | Nature of the liquid |
| B. | Temperature of the liquid |
| C. | Atmospheric pressure |
| D. | All of the above |
| Answer» E. | |
| 99. |
When some detergent is added to water, the surface tension |
| A. | Increases |
| B. | Decreases |
| C. | Remains unaffected |
| D. | None of these |
| Answer» E. | |
| 100. |
Fat can be separated from milk in a cream separator because of |
| A. | Cohesive force |
| B. | Gravitational force |
| C. | Centripetal force |
| D. | Centrifugal force |
| Answer» E. | |