MCQOPTIONS
Saved Bookmarks
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.
| 401. |
A simple method to find the center of gravity of a body is the usage of |
| A. | stop watch |
| B. | plumb line |
| C. | pendulum |
| D. | screw gauge |
| Answer» C. pendulum | |
| 402. |
If the force is applied at the center of mass then torque is |
| A. | maximum |
| B. | zero |
| C. | 1 |
| D. | infinity |
| Answer» C. 1 | |
| 403. |
If the sum of clockwise moments acting on a body is equal to the sum of anticlockwise moments acting on it, then the body is |
| A. | balanced |
| B. | unbalanced |
| C. | rigid |
| D. | flexible |
| Answer» B. unbalanced | |
| 404. |
The rate of heat flow is |
| A. | directly proportional to length |
| B. | inversely proportional to length |
| C. | not related to length |
| D. | none of above |
| Answer» B. inversely proportional to length | |
| 405. |
The mode of transfer of heat by vibrating atoms and free electrons in solids from hot to cold parts of a body is known as heat's |
| A. | radiation |
| B. | convection |
| C. | conduction |
| D. | fusion |
| Answer» D. fusion | |
| 406. |
Poor conductors of heat are |
| A. | liquids only |
| B. | gases only |
| C. | metals |
| D. | liquids and gases |
| Answer» E. | |
| 407. |
The rising currents of hot air are called |
| A. | air currents |
| B. | thermals |
| C. | radiation |
| D. | layers |
| Answer» C. radiation | |
| 408. |
A metal box having four faces of different nature is called |
| A. | Leslie triangle |
| B. | Leslie hexagon |
| C. | Leslie pentagon |
| D. | Leslie cube |
| Answer» E. | |
| 409. |
A nuclear power plant uses the energy released in nuclear reactor to generate electric power is called |
| A. | fission |
| B. | friction |
| C. | hydrogen |
| D. | mercury |
| Answer» B. friction | |
| 410. |
The water stored in damns is used for irrigation and also to generate |
| A. | heat energy |
| B. | electrical energy |
| C. | thermal energy |
| D. | chemical energy |
| Answer» C. thermal energy | |
| 411. |
The potential energy stored in a body of mass 50 kg when it raised to height of 3 m is |
| A. | 500 J |
| B. | 1000 J |
| C. | 1500 J |
| D. | 100 J |
| Answer» D. 100 J | |
| 412. |
If a pump can lift 80 kg of water through a vertical height of 20 meters in 25 seconds. Then the power of the pump is |
| A. | 350 watts |
| B. | 400 watts |
| C. | 640 watts |
| D. | 500 watts |
| Answer» D. 500 watts | |
| 413. |
An electric lamp produces |
| A. | light energy only |
| B. | heat energy only |
| C. | chemical energy |
| D. | light and heat energy |
| Answer» E. | |
| 414. |
If a body does change its position concerning its surroundings, it is said to be at |
| A. | distance |
| B. | position |
| C. | rest |
| D. | motion |
| Answer» E. | |
| 415. |
In a graph, in which time is taken along X-axis and speed is taken along Y-axis is called |
| A. | speed-time graph |
| B. | pi chart |
| C. | distance graph |
| D. | square graph |
| Answer» B. pi chart | |
| 416. |
The velocity with which a paratrooper comes to the ground is called |
| A. | average velocity |
| B. | variable velocity |
| C. | constant velocity |
| D. | terminal velocity |
| Answer» E. | |
| 417. |
If the object is at rest then the distance-time graph is |
| A. | straight lined |
| B. | variable |
| C. | constant |
| D. | zero |
| Answer» D. zero | |
| 418. |
A stone is dropped from the top of a building which is 180 meters high. If the stone hits the ground after 6 seconds, its final velocity will be |
| A. | 40 ms−1 |
| B. | 50 ms−1 |
| C. | 60 ms−1 |
| D. | 110 ms−1 |
| Answer» D. 110 ms−1 | |
| 419. |
The reference point is taken as |
| A. | origin |
| B. | anywhere on x-axis |
| C. | anywhere on y-axis |
| D. | in between two coordinates |
| Answer» B. anywhere on x-axis | |
| 420. |
The location of a place or a point with respect to some reference point(origin) is known as |
| A. | velocity |
| B. | rest |
| C. | displacement |
| D. | position |
| Answer» E. | |
| 421. |
If a body doesn't change its position with respect to its surroundings then its in state of |
| A. | motion |
| B. | rest |
| C. | equilibrium |
| D. | weightlessness |
| Answer» C. equilibrium | |
| 422. |
The study of motion of an object without discussing the cause of motion is known as |
| A. | kinematics |
| B. | dynamics |
| C. | trinamics |
| D. | friction |
| Answer» B. dynamics | |
| 423. |
A bus accelerates at 1 ms−2 from an initial velocity of 4 ms−1 for 10s. The distance moved in that time will be |
| A. | 90 meter |
| B. | 25 meter |
| C. | 60 meter |
| D. | 72 meter |
| Answer» B. 25 meter | |
| 424. |
Deceleration or retardation are the synonyms of |
| A. | positive acceleration |
| B. | negative acceleration |
| C. | zero acceleration |
| D. | speed |
| Answer» C. zero acceleration | |
| 425. |
Among the following the scalar quantity is |
| A. | length |
| B. | mass |
| C. | volume |
| D. | all of above |
| Answer» E. | |
| 426. |
The rate of displacement of a body is called its |
| A. | non-uniform speed |
| B. | non-uniform velocity |
| C. | velocity |
| D. | speed |
| Answer» D. speed | |
| 427. |
The motion of a baby in a swing is an example of |
| A. | circular motion |
| B. | rotatory motion |
| C. | random motion |
| D. | vibratory motion |
| Answer» E. | |
| 428. |
The motion of a steering wheel is an example of |
| A. | vibratory motion |
| B. | circular motion |
| C. | rotatory motion |
| D. | linear motion |
| Answer» D. linear motion | |
| 429. |
Velocity, displacement, force, momentum are the examples of |
| A. | energy |
| B. | scalar |
| C. | vector |
| D. | length |
| Answer» D. length | |
| 430. |
In distance-time graph time is taken on |
| A. | y-axis |
| B. | x-axis |
| C. | z-axis |
| D. | in between two coordinates |
| Answer» C. z-axis | |
| 431. |
A motion in which a body moves along a line without any rotation is known as |
| A. | translatory motion |
| B. | rotatory motion |
| C. | vibratory motion |
| D. | rest |
| Answer» B. rotatory motion | |
| 432. |
The disordered or irregular motion of an object is called |
| A. | vibratory motion |
| B. | circular motion |
| C. | linear motion |
| D. | random motion |
| Answer» E. | |
| 433. |
A chips wrapper is 4.5 cm long and 5.9 cm wide. Its area up to significant figures will be |
| A. | 30 cm² |
| B. | 28 cm² |
| C. | 26.55 cm² |
| D. | 32 cm² |
| Answer» D. 32 cm² | |
| 434. |
The “seconds in a day” can be written in standard form as |
| A. | 864 × 105 s |
| B. | 86.4 × 105 s |
| C. | 8640 × 105 s |
| D. | 8.64 × 105 s |
| Answer» E. | |
| 435. |
The least count of the Vernier caliper is |
| A. | 1 mm |
| B. | 0.5 mm |
| C. | 0.1 mm |
| D. | 0.001 mm |
| Answer» D. 0.001 mm | |
| 436. |
The least count of Vernier calipers is |
| A. | 0.01 mm |
| B. | 0.1mm |
| C. | 0.01 cm |
| D. | 1 cm |
| Answer» D. 1 cm | |
| 437. |
The words or letters added before a unit and stand for the multiples or sub-multiples of that unit are called |
| A. | mass |
| B. | prefixes |
| C. | units |
| D. | rate |
| Answer» C. units | |
| 438. |
Peter claimed that the diameter of a wire is 1.042 using Vernier calipers. Up to what extent he is right? |
| A. | 1 cm |
| B. | 1.0 cm |
| C. | 1.04 cm |
| D. | 1.042 cm |
| Answer» D. 1.042 cm | |
| 439. |
The study of the motion of objects, its causes and effects is called |
| A. | heat |
| B. | mechanics |
| C. | atomic physics |
| D. | plasma physics |
| Answer» C. atomic physics | |
| 440. |
By converting 3 700 000 Watt into kilowatt, we get |
| A. | 3.7 W |
| B. | 3 700 kW |
| C. | 3 7000 kW |
| D. | 37 kW |
| Answer» C. 3 7000 kW | |
| 441. |
A worldwide system of measurements in which the units of base quantities were introduced is called |
| A. | prefixes |
| B. | international system of units |
| C. | scientific names |
| D. | Nomenclature |
| Answer» C. scientific names | |
| 442. |
All physical quantities are |
| A. | not measurable |
| B. | measurable |
| C. | related to each other |
| D. | not related to each other |
| Answer» C. related to each other | |
| 443. |
The unit which is not derived is |
| A. | newton |
| B. | kilogram |
| C. | watt |
| D. | pascal |
| Answer» C. watt | |
| 444. |
One division of Vernier scale is of |
| A. | 1 cm |
| B. | 1 mm |
| C. | 2 mm |
| D. | 0.9 mm |
| Answer» E. | |
| 445. |
In screw gauge a thimble around its one end has |
| A. | 50 divisions |
| B. | 250 divisions |
| C. | 100 divisions |
| D. | 10 divisions |
| Answer» D. 10 divisions | |
| 446. |
The distance of the moon from the earth is |
| A. | 3.84 * 108 m |
| B. | 100 km |
| C. | 1000 km |
| D. | 2000 km |
| Answer» B. 100 km | |
| 447. |
A refrigerator is made on the principles of |
| A. | heat |
| B. | atomic physics |
| C. | plasma physics |
| D. | thermodynamics |
| Answer» E. | |
| 448. |
The least count of the digital stopwatch is |
| A. | 0.2 s |
| B. | 0.1 s |
| C. | 0.3 s |
| D. | 0.01 s |
| Answer» E. | |
| 449. |
The word ‘Science’ is derived from a Latin word |
| A. | scientific |
| B. | significant |
| C. | Scientia |
| D. | scientum |
| Answer» D. scientum | |
| 450. |
To measure various physical quantities such as length, time, mass, volume, etc. we use |
| A. | mechanics |
| B. | measuring instruments |
| C. | prefixes |
| D. | suffixes |
| Answer» C. prefixes | |