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MCQOPTIONS
This section includes 760 Mcqs, each offering curated multiple-choice questions to sharpen your Grade9 knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The resultant of forces 10 N along x-axis, 6 N along y-axis and 4 N along negative x-axis is |
| A. | 8.5 N making angle 45° with x-axis |
| B. | 8.5 N making angle 90° with x-axis |
| C. | 8.3 N making angle 30° with x-axis |
| D. | 8 N making angle 45° with x-axis |
| Answer» B. 8.5 N making angle 90° with x-axis | |
| 52. |
A block of weight 12 N is hanging through a string. Its tension in the string will be |
| A. | 10 N |
| B. | 11 N |
| C. | 12 N |
| D. | 0 N |
| Answer» D. 0 N | |
| 53. |
Moment arm is the |
| A. | parallel distance |
| B. | perpendicular distance |
| C. | normal distance |
| D. | resultant force |
| Answer» C. normal distance | |
| 54. |
Two unlike parallel forces of the same magnitude but not along the same line forms a |
| A. | couple |
| B. | inertia |
| C. | gravity |
| D. | friction |
| Answer» B. inertia | |
| 55. |
A thermometric liquid's freezing point should be |
| A. | same |
| B. | high |
| C. | low |
| D. | constant |
| Answer» D. constant | |
| 56. |
Specified heat of dry soil is |
| A. | 900 -1 K-1 |
| B. | 810 -1 K-1 |
| C. | 760 -1 K-1 |
| D. | 589 -1 K-1 |
| Answer» C. 760 -1 K-1 | |
| 57. |
To measure temperature especially in ovens and furnaces, we use |
| A. | laser thermometers |
| B. | alcohol thermometers |
| C. | mercury-in-glass thermometers |
| D. | bimetal thermometers |
| Answer» E. | |
| 58. |
The temperature of water in a breaker is 40 °C. Its value in Fahrenheit scale is |
| A. | 110 °F |
| B. | 104 °F |
| C. | 130 °F |
| D. | 116 °F |
| Answer» C. 130 °F | |
| 59. |
When the volume of solid changes with the change in temperature then it is called |
| A. | volume thermal contraction |
| B. | double volume |
| C. | volume thermal expansion |
| D. | volume constant |
| Answer» D. volume constant | |
| 60. |
If the length of wire is 1 m and cross-sectional area 5×10-5 m&sup2, when the wire stretched through 1 mm by a force of 10,000 N. The Young's modulus of the wire would be |
| A. | 2×105 Nm-2 |
| B. | 2×109 Nm-2 |
| C. | 2×108 Nm-2 |
| D. | 2×1011 Nm-2 |
| Answer» E. | |
| 61. |
The density of metal spoon when its weight in air is 0.48 N and in water is 0.42 N is |
| A. | 1000 kg m-3 |
| B. | 4000 kg m-3 |
| C. | 6000 kg m-3 |
| D. | 8000 kg m-3 |
| Answer» E. | |
| 62. |
If stress produces a change in the length of an object then the strain is termed as |
| A. | zero strain |
| B. | constant strain |
| C. | former strain |
| D. | tensile strain |
| Answer» E. | |
| 63. |
The instruments that measure atmospheric pressure are called |
| A. | beam balance |
| B. | thermometers |
| C. | barometers |
| D. | screw gauge |
| Answer» D. screw gauge | |
| 64. |
During cold chilly nights, the atmospheric pressure is |
| A. | decreased |
| B. | remains constant |
| C. | becomes zero |
| D. | increased |
| Answer» E. | |
| 65. |
The force due to which everybody of the universe attracts every other body |
| A. | force of gravitation |
| B. | force of limiting friction |
| C. | force of inertia |
| D. | force of mechanics |
| Answer» B. force of limiting friction | |
| 66. |
The gravitational pull of the Earth acting on the body whether the body is in contact with the Earth or not, such force is known as |
| A. | force of inertia |
| B. | force of limiting friction |
| C. | force of inertia |
| D. | field force |
| Answer» E. | |
| 67. |
The value of gravitation on moon's surface is 1.6 ms-1. The weight of a 100 kg body on the moon's surface will be |
| A. | 80 N |
| B. | 100 Ns |
| C. | 120 N |
| D. | 160 N |
| Answer» E. | |
| 68. |
2 lead spheres having a mass of 1000 kg each are placed with their centers 1 m apart. The gravitational force with which they attract to each other will be |
| A. | 6.673 x105 |
| B. | 66.73 x105 |
| C. | 6673 x10-5 |
| D. | 6.673 x10-5 |
| Answer» E. | |
| 69. |
The gravitational field is directed |
| A. | towards the earth |
| B. | away from earth |
| C. | has no direction |
| D. | in a specific direction making angle with earth |
| Answer» B. away from earth | |
| 70. |
The gravitational force of attraction between the satellite and the Earth provides the necessary |
| A. | centrifugal force |
| B. | centripetal force |
| C. | dynamic force |
| D. | translatory force |
| Answer» C. dynamic force | |
| 71. |
Everybody in the universe attracts every other body with the force which is directly proportional to the product of their masses and inversely proportional to the square of distance between their centers, this statement is known as |
| A. | law of friction |
| B. | law of gravitation |
| C. | law of motion |
| D. | law of momentum |
| Answer» C. law of motion | |
| 72. |
The orbital speed of a low orbit satellite is |
| A. | 8000 ms-1 |
| B. | zero |
| C. | 800 ms-1 |
| D. | 80 ms-1 |
| Answer» B. zero | |
| 73. |
Orbital velocity(vo) is equal to |
| A. | √[gh(R + h)] |
| B. | √[gh(R - h)] |
| C. | √[gh ⁄ (R - h)] |
| D. | √[gh ⁄ (R + h)] |
| Answer» B. √[gh(R - h)] | |
| 74. |
The height of an object or place above the sea level is known as |
| A. | magnitude |
| B. | volume |
| C. | altitude |
| D. | area |
| Answer» D. area | |
| 75. |
To measure the time interval of an event, we use |
| A. | screw gauge |
| B. | physical balance |
| C. | Vernier calipers |
| D. | stop watch |
| Answer» E. | |
| 76. |
The study of the production, properties of the iconic state of matter is called |
| A. | atomic physics |
| B. | plasma physics |
| C. | mechanics |
| D. | nuclear physics |
| Answer» C. mechanics | |
| 77. |
The quantities based on which other quantities are expressed are called |
| A. | prefixes |
| B. | base quantities |
| C. | derived quantities |
| D. | quartile quantities |
| Answer» C. derived quantities | |
| 78. |
Non-zero digits are always |
| A. | significant |
| B. | non-significant |
| C. | worthless |
| D. | none of above |
| Answer» B. non-significant | |
| 79. |
The number 0.0000548 can be represented in scientific notation as |
| A. | 5.48 |
| B. | 548 |
| C. | 5.48 * 10-5 |
| D. | 54.8 |
| Answer» D. 54.8 | |
| 80. |
The potential energy is given by |
| A. | w * h |
| B. | f * s |
| C. | mv |
| D. | ma |
| Answer» B. f * s | |
| 81. |
In nuclear power plants, we get energy as a result of |
| A. | molecular reaction |
| B. | potential reaction |
| C. | nuclear reaction |
| D. | fission reaction |
| Answer» E. | |
| 82. |
1 joule is equal to |
| A. | 1 N × 1 m |
| B. | 1 N + 1 m |
| C. | 1 N - 1 m |
| D. | 1 G9 × 1 m |
| Answer» B. 1 N + 1 m | |
| 83. |
When a body vibrates, it produces |
| A. | sound |
| B. | water |
| C. | heat |
| D. | electricity |
| Answer» B. water | |
| 84. |
The ratio of required output to input is called |
| A. | efficiency |
| B. | deficiency |
| C. | loss of energy |
| D. | gain of energy |
| Answer» B. deficiency | |
| 85. |
If a body covers equal distances in equal intervals of time however short the interval maybe, then it has |
| A. | uniform velocity |
| B. | uniform speed |
| C. | uniform acceleration |
| D. | non-uniform velocity |
| Answer» C. uniform acceleration | |
| 86. |
The total length of the path is named |
| A. | displacement |
| B. | distance |
| C. | length |
| D. | all of above |
| Answer» C. length | |
| 87. |
Distance covered ⁄ time taken is equal to |
| A. | speed |
| B. | velocity |
| C. | displacement |
| D. | position |
| Answer» B. velocity | |
| 88. |
The motion of a butterfly is an example of |
| A. | vibratory motion |
| B. | circular motion |
| C. | linear motion |
| D. | random motion |
| Answer» E. | |
| 89. |
A quantity described by magnitude and direction both are called |
| A. | scalar |
| B. | vector |
| C. | unit |
| D. | all of above |
| Answer» C. unit | |
| 90. |
If we convert 110 °F into Celsius scale of temperature, we get |
| A. | 43.3 °C |
| B. | 0 °C |
| C. | 150 °C |
| D. | 60.5 °C |
| Answer» B. 0 °C | |
| 91. |
Wires on electric poles are given some sag on order to prevent |
| A. | expansion in winters |
| B. | contraction in winters |
| C. | touching with each other |
| D. | from coming in way of air planes |
| Answer» C. touching with each other | |
| 92. |
The coefficient of linear thermal expansion of a substance is denoted by |
| A. | α |
| B. | β |
| C. | π |
| D. | ω |
| Answer» B. β | |
| 93. |
Bridges with rollers below one of their ends allow movements due to |
| A. | expansion only |
| B. | contraction only |
| C. | suspension |
| D. | expansion and contraction |
| Answer» E. | |
| 94. |
On Celsius scale, the interval between the lower and upper fixed points is divided into |
| A. | 100 equal parts |
| B. | 180 equal parts |
| C. | 50 equal parts |
| D. | 90 equal parts |
| Answer» B. 180 equal parts | |
| 95. |
A straight line parallel to time-axis on a distance-time graph tells that the object is |
| A. | at rest |
| B. | in motion |
| C. | moving with constant speed |
| D. | moving with variable speed |
| Answer» D. moving with variable speed | |
| 96. |
A ball is thrown vertically upward. Its velocity at the highest point is |
| A. | zero |
| B. | 10 ms−1 |
| C. | 15 ms−1 |
| D. | 20 ms−1 |
| Answer» B. 10 ms−1 | |
| 97. |
(Final velocity - initial velocity) is called |
| A. | position |
| B. | acceleration |
| C. | change in velocity |
| D. | displacement |
| Answer» D. displacement | |
| 98. |
A passenger John is sitting in a moving car, as per an observer outside the car, he is at |
| A. | position |
| B. | rest |
| C. | motion |
| D. | displacement |
| Answer» D. displacement | |
| 99. |
A cyclist completes half round of a circle track of radius 420 meters in 3 minutes. Its velocity will be |
| A. | 4.67 ms−1 |
| B. | 5.33 ms−1 |
| C. | 2.8 ms−1 |
| D. | 3.5 ms−1 |
| Answer» B. 5.33 ms−1 | |
| 100. |
The maximum value of friction is known as the |
| A. | initial friction |
| B. | force of limiting friction |
| C. | fixed friction |
| D. | inertia |
| Answer» C. fixed friction | |