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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.
| 301. |
We study the physical aspects of sound waves, their production, properties and applications under the branch named as |
| A. | sound |
| B. | atomic physics |
| C. | plasma physics |
| D. | heat |
| Answer» B. atomic physics | |
| 302. |
The international system of units is commonly referred as |
| A. | SI |
| B. | ISU |
| C. | SU |
| D. | IU |
| Answer» B. ISU | |
| 303. |
The study of the structure and properties of matter is called |
| A. | atomic physics |
| B. | mechanics |
| C. | plasma physics |
| D. | geophysics |
| Answer» B. mechanics | |
| 304. |
The units used to measure derived quantities are known as |
| A. | square units |
| B. | derived units |
| C. | base units |
| D. | scalar units |
| Answer» C. base units | |
| 305. |
White and polished surface reflects more heat than |
| A. | black surface only |
| B. | rough surface only |
| C. | polished surface |
| D. | black and rough surface |
| Answer» E. | |
| 306. |
In home utensils such as handles of sauce-pans, spoons, hot-plates etc. we use |
| A. | plasma |
| B. | good conductors |
| C. | bad conductors |
| D. | mercury |
| Answer» D. mercury | |
| 307. |
The movement of cold air from the land towards the sea is called |
| A. | wind energy |
| B. | planetary wind |
| C. | land breeze |
| D. | sea breeze |
| Answer» D. sea breeze | |
| 308. |
The rate of emission of radiation depends on |
| A. | color and texture of surface |
| B. | surface temperature |
| C. | surface area |
| D. | all of above |
| Answer» E. | |
| 309. |
The substances through which heat does not conduct easily are called |
| A. | bad conductors |
| B. | good conductors |
| C. | good convections |
| D. | bad convections |
| Answer» B. good conductors | |
| 310. |
In physics we study |
| A. | matter and energy only |
| B. | interaction between matter and energy only |
| C. | composition of matter |
| D. | matter & energy and interaction between matter and energy |
| Answer» E. | |
| 311. |
Kilo, mega, giga, milli are the example of |
| A. | base units |
| B. | derived units |
| C. | prefixes |
| D. | square units |
| Answer» D. square units | |
| 312. |
The unit of area is |
| A. | meter² |
| B. | meter³ |
| C. | meter |
| D. | C |
| Answer» B. meter³ | |
| 313. |
A meter rule is used to measure |
| A. | weight |
| B. | mass |
| C. | length |
| D. | force |
| Answer» D. force | |
| 314. |
A mechanical stopwatch can measure minimum value up to |
| A. | 0.1 s |
| B. | 0.2 s |
| C. | 0.3 s |
| D. | 0.4 s |
| Answer» B. 0.2 s | |
| 315. |
The good radiators of heat among these are |
| A. | a shining silver surface |
| B. | a dull black surface |
| C. | a white surface |
| D. | a green colored surface |
| Answer» C. a white surface | |
| 316. |
Transfer of heat through actual movement of molecules is |
| A. | conduction |
| B. | radiation |
| C. | convection |
| D. | diffusion |
| Answer» D. diffusion | |
| 317. |
Wood, cork, cotton, rubber, glass etc. are |
| A. | bad conductors |
| B. | good conductors |
| C. | good convections |
| D. | bad convections |
| Answer» B. good conductors | |
| 318. |
Thermal conductivity of water is |
| A. | 1.58 Wm-1 K-1 |
| B. | 0.59 Wm-1 K-1 |
| C. | 0.026 Wm-1 K-1 |
| D. | 0.75 Wm-1 K-1 |
| Answer» C. 0.026 Wm-1 K-1 | |
| 319. |
A transparent polyethene sheet works as heat trapper because it |
| A. | traps radiations of sun inside only |
| B. | passes radiations of short wavelength only |
| C. | traps long wavelength radiations |
| D. | traps radiation of sun inside and passes radiations of short wavelength |
| Answer» E. | |
| 320. |
A cyclist completes a half-round of a circular track of radius 420 meters in 3 minutes. Its speed will be |
| A. | 5 ms−1 |
| B. | 8 ms−1 |
| C. | 10 ms−1 |
| D. | 7.33 ms−1 |
| Answer» E. | |
| 321. |
The distorted motion of an object is |
| A. | circular |
| B. | random |
| C. | vibratory |
| D. | vibratory and translational |
| Answer» C. vibratory | |
| 322. |
Velocity is the rate of change of |
| A. | displacement |
| B. | distance |
| C. | force |
| D. | mass |
| Answer» B. distance | |
| 323. |
The rest state and motion of the body are |
| A. | non relative |
| B. | not related |
| C. | relative |
| D. | none of above |
| Answer» D. none of above | |
| 324. |
A train moves with a uniform velocity of 27 kmh−1 for 15 s. The distance covered by it is |
| A. | 112.5 m |
| B. | 115 m |
| C. | 120 m |
| D. | 135 m |
| Answer» B. 115 m | |
| 325. |
Latent heat of vaporization is |
| A. | 3.36 × 106 Jkg-1 |
| B. | 4.36 × 106 Jkg-1 |
| C. | 2.26 × 106 Jkg-1 |
| D. | 1.36 × 106 Jkg-1 |
| Answer» D. 1.36 × 106 Jkg-1 | |
| 326. |
Mercury freezes at |
| A. | −39 ° C |
| B. | 39 ° C |
| C. | 45 ° C |
| D. | −45 ° C |
| Answer» B. 39 ° C | |
| 327. |
On increasing the temperature of solid, the amplitude of vibration of its atoms |
| A. | decreases |
| B. | remains same |
| C. | increases |
| D. | constant |
| Answer» D. constant | |
| 328. |
The energy that is transferred from one body to the other in thermal contact with each other as a result of the difference of temperature between them is called |
| A. | stress |
| B. | heat |
| C. | pressure |
| D. | temperature |
| Answer» C. pressure | |
| 329. |
The quantity of thermal energy absorbed by a body for 1 kelvin increase in its temperature is known as |
| A. | pressure capacity |
| B. | heat capacity |
| C. | kinetic energy |
| D. | potential energy |
| Answer» C. kinetic energy | |
| 330. |
The energy stored in a dam is |
| A. | kinetic energy |
| B. | potential energy |
| C. | elastic potential energy |
| D. | geothermal energy |
| Answer» C. elastic potential energy | |
| 331. |
A nuclear reactor generates electricity by using |
| A. | thermal energy |
| B. | nuclear energy |
| C. | mechanical energy |
| D. | chemical energy |
| Answer» C. mechanical energy | |
| 332. |
If a body is capable to do work, then it possesses |
| A. | work |
| B. | friction |
| C. | energy |
| D. | velocity |
| Answer» D. velocity | |
| 333. |
If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be |
| A. | minimum |
| B. | zero |
| C. | maximum |
| D. | constant |
| Answer» C. maximum | |
| 334. |
A force of 100 N moves a crate 10 m on the horizontal road. The work done is |
| A. | 1 J |
| B. | 150 J |
| C. | 100 J |
| D. | 1000 J |
| Answer» E. | |
| 335. |
Pressure applied at any point of a liquid enclosed in a container, is transmitted without loss to all other parts of the liquid is called |
| A. | Newton's Law |
| B. | Archimedes Law |
| C. | Einstein Law |
| D. | Pascal's Law |
| Answer» E. | |
| 336. |
The weight of a metal bar in water is 0.42 N and in air is 0.48, its density would be |
| A. | 8000 kg m-3 |
| B. | 5000 kg m-3 |
| C. | 6000 kg m-3 |
| D. | 7000 kg m-3 |
| Answer» B. 5000 kg m-3 | |
| 337. |
In Hooke's law, constant is equal to |
| A. | stress × strain |
| B. | strain/stress |
| C. | stress/strain |
| D. | stress + strain |
| Answer» D. stress + strain | |
| 338. |
The fourth state of matter is called |
| A. | solids |
| B. | gasses |
| C. | plasma |
| D. | liquids |
| Answer» D. liquids | |
| 339. |
The state of matter in which a gas occurs in its ionic state is known as |
| A. | solids |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» E. | |
| 340. |
The units that describe base quantities are known as |
| A. | derived units |
| B. | square units |
| C. | base units |
| D. | none of above |
| Answer» D. none of above | |
| 341. |
The unit for density is |
| A. | m |
| B. | mole |
| C. | kg m-3 |
| D. | Pa |
| Answer» D. Pa | |
| 342. |
In screw gauge, around one end the thimble has |
| A. | 100 divisions |
| B. | 10 divisions |
| C. | 20 divisions |
| D. | 50 divisions |
| Answer» B. 10 divisions | |
| 343. |
Measuring cylinder is used to measure the |
| A. | area of liquid |
| B. | volume of liquid |
| C. | density of liquid |
| D. | pressure of liquid |
| Answer» C. density of liquid | |
| 344. |
The unit of volume is |
| A. | meter |
| B. | meter² |
| C. | meter³ |
| D. | C |
| Answer» D. C | |
| 345. |
When the quick transfer of heat is required through a body, we use |
| A. | mercury |
| B. | bad conductors |
| C. | plasma |
| D. | good conductors |
| Answer» E. | |
| 346. |
The amount of heat that flows in unit time is called the heat's |
| A. | rate on indicacy |
| B. | rate of stress |
| C. | flow of heat |
| D. | rate of power |
| Answer» D. rate of power | |
| 347. |
The movement of cold air from the sea towards the land is called |
| A. | land breeze |
| B. | wind energy |
| C. | planetary wind |
| D. | sea breeze |
| Answer» E. | |
| 348. |
Bad conductors are also called |
| A. | convectors |
| B. | insulators |
| C. | radiant |
| D. | termaids |
| Answer» C. radiant | |
| 349. |
The weight of a body is 150 N. Its mass will be |
| A. | 10 kg |
| B. | 15 kg |
| C. | 18 kg |
| D. | 20 kg |
| Answer» C. 18 kg | |
| 350. |
Centripetal reaction that pulls the string outward is sometimes called the |
| A. | centrifugal force |
| B. | gravitational force |
| C. | dynamic force |
| D. | translatory force |
| Answer» B. gravitational force | |