MCQOPTIONS
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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.
| 251. |
The study of the fourth state of matter is called |
| A. | nuclear physics |
| B. | plasma physics |
| C. | nano physics |
| D. | quantum physics |
| Answer» C. nano physics | |
| 252. |
The power of the pump when it can lift 70 kg of water through 16 m in 10 s is |
| A. | 100 W |
| B. | 1120 W |
| C. | 1000 W |
| D. | 2000 W |
| Answer» C. 1000 W | |
| 253. |
The energy coming from the sun for the last billion years is the result of a |
| A. | heat reactions |
| B. | nuclear reactions |
| C. | molecular reactions |
| D. | potential reaction |
| Answer» C. molecular reactions | |
| 254. |
(Force × displacement) is equal to |
| A. | distance |
| B. | work |
| C. | momentum |
| D. | inertia |
| Answer» C. momentum | |
| 255. |
The energy released in the form of nuclear radiations in addition to heat and light during nuclear reactions is known as |
| A. | chemical energy |
| B. | nuclear energy |
| C. | heat energy |
| D. | electrical energy |
| Answer» D. electrical energy | |
| 256. |
Natural processes such as volcanic eruptions, forest fires causes |
| A. | water pollution |
| B. | nuclear pollution |
| C. | traffic pollution |
| D. | air pollution |
| Answer» E. | |
| 257. |
A stretched bow contains |
| A. | heat energy |
| B. | potential energy |
| C. | kinetic energy |
| D. | mechanical energy |
| Answer» E. | |
| 258. |
Fossil fuels are |
| A. | non renewable energy sources |
| B. | renewable energy sources |
| C. | reliable |
| D. | non reliable |
| Answer» B. renewable energy sources | |
| 259. |
Which of the following converts light energy into electrical energy? |
| A. | photocell |
| B. | electrical generator |
| C. | electric cell |
| D. | electric bulb |
| Answer» B. electrical generator | |
| 260. |
Electrical energy can be easily supplied to any desired place through |
| A. | water |
| B. | pipes |
| C. | signals |
| D. | wires |
| Answer» E. | |
| 261. |
The energy possessed by a body due to its motion is called its |
| A. | potential energy |
| B. | kinetic energy |
| C. | heat energy |
| D. | chemical energy |
| Answer» C. heat energy | |
| 262. |
Newton's first law of motion is valid only in the absence of |
| A. | force |
| B. | net force |
| C. | momentum |
| D. | friction |
| Answer» C. momentum | |
| 263. |
The force of gravity acting on a body is known as its |
| A. | mass |
| B. | inertia |
| C. | weight |
| D. | force |
| Answer» D. force | |
| 264. |
The ratio between the force of the limiting friction and the normal reaction is |
| A. | always negative |
| B. | always zero |
| C. | constant |
| D. | variable |
| Answer» D. variable | |
| 265. |
The product of the mass of a body and velocity is equal to its |
| A. | inertia |
| B. | momentum |
| C. | force |
| D. | friction |
| Answer» C. force | |
| 266. |
The quantity of matter inside body is |
| A. | inertia |
| B. | weight |
| C. | mass |
| D. | density |
| Answer» D. density | |
| 267. |
If a body remains in its new position when disturbed from its previous position, then it is said to be in the state of |
| A. | stable equilibrium |
| B. | unstable equilibrium |
| C. | neutral equilibrium |
| D. | zero equilibrium |
| Answer» D. zero equilibrium | |
| 268. |
Two children sitting on a see saw are not swinging, the net torque is |
| A. | greater than 1 |
| B. | less than 1 |
| C. | zero |
| D. | infinite |
| Answer» D. infinite | |
| 269. |
When the resultant torque acting on a body is zero, then the body satisfies |
| A. | 2nd condition for equilibrium |
| B. | third condition for equilibrium |
| C. | no equilibrium state |
| D. | first condition for equilibrium |
| Answer» B. third condition for equilibrium | |
| 270. |
The number of perpendicular components of a force are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 271. |
For a right angle triangle if base is 4 cm and perpendicular is 3 cm then cosθ is equal to |
| A. | 0.9 |
| B. | 0.8 |
| C. | 0.3 |
| D. | 1 |
| Answer» C. 0.3 | |
| 272. |
In liquid glass thermometer when bulb comes in contact with a hot object, the liquid inside it |
| A. | expands |
| B. | contracts |
| C. | remains same |
| D. | none of above |
| Answer» B. contracts | |
| 273. |
If the surface area of liquid is large then evaporation will be |
| A. | small |
| B. | large |
| C. | moderate |
| D. | slow |
| Answer» C. moderate | |
| 274. |
An increase in breadth, length, and thickness of a substance is due to |
| A. | fusion |
| B. | thermal expansion |
| C. | stress |
| D. | boiling |
| Answer» C. stress | |
| 275. |
A container has 2.4 liters of water at 20 °C. The heat required to boil the water is |
| A. | 1500 kJ |
| B. | 1258 kJ |
| C. | 1344 kJ |
| D. | 698 kJ |
| Answer» D. 698 kJ | |
| 276. |
The molecules of a solid vibrate with larger amplitude at |
| A. | zero temperature |
| B. | lower temperature |
| C. | higher temperature |
| D. | pressure |
| Answer» D. pressure | |
| 277. |
The number of perpendicular components of force are |
| A. | 1 |
| B. | 3 |
| C. | 2 |
| D. | 4 |
| Answer» B. 3 | |
| 278. |
The door is opened or closed due to the |
| A. | weight |
| B. | turning effect on it |
| C. | distance from roof |
| D. | height |
| Answer» C. distance from roof | |
| 279. |
The number of forces that can be added by head to tail rule are |
| A. | 4 |
| B. | 2 |
| C. | 5 |
| D. | any number |
| Answer» E. | |
| 280. |
The forces applied in same direction which are parallel to each other are known as |
| A. | unlike forces |
| B. | negative forces |
| C. | parallel forces |
| D. | opposite forces |
| Answer» D. opposite forces | |
| 281. |
Point where force causes system to move without rotation is |
| A. | center of mass |
| B. | midpoint of body |
| C. | edge of the body |
| D. | none of above |
| Answer» B. midpoint of body | |
| 282. |
If a body of mass ‘m’ at an altitude ‘h’, then the distance of the body from the center of the Earth will become |
| A. | R + h |
| B. | R - h |
| C. | R × h |
| D. | R ⁄ h |
| Answer» B. R - h | |
| 283. |
The height of geostationary satellite is about |
| A. | 56,890 km |
| B. | 45,000 km |
| C. | 33,500 km |
| D. | 42,300 km |
| Answer» E. | |
| 284. |
The objects scientists sent to the space and they revolves around the Earth are termed as |
| A. | natural satellites |
| B. | artificial satellites |
| C. | solar cars |
| D. | robots |
| Answer» C. solar cars | |
| 285. |
In central heating systems, to carry thermal energy through pipes from the boiler to radiators we use |
| A. | hot water |
| B. | cold water |
| C. | mercury |
| D. | carbonates |
| Answer» B. cold water | |
| 286. |
The substance which has the greatest average kinetic energy is |
| A. | steel |
| B. | copper |
| C. | water |
| D. | lead |
| Answer» D. lead | |
| 287. |
On the Kelvin scale, the upper fixed point is marked as |
| A. | 180 K |
| B. | 273 K |
| C. | 373 K |
| D. | 0 K |
| Answer» D. 0 K | |
| 288. |
In SI units, the unit of temperature is |
| A. | kelvin(K) |
| B. | omega(ω) |
| C. | pi(π) |
| D. | newton(N) |
| Answer» B. omega(ω) | |
| 289. |
Greater number of molecules has the chance to escape from the surface if its area is |
| A. | smaller |
| B. | larger |
| C. | deep |
| D. | shallow |
| Answer» C. deep | |
| 290. |
The study of the nature of heat, modes of transfer and effects of heat is studied under the branch named as |
| A. | mechanics |
| B. | Light |
| C. | heat |
| D. | atomic physics |
| Answer» D. atomic physics | |
| 291. |
To measure small lengths such as the diameter of a wire, the thickness of a metal sheet, etc. We use |
| A. | physical balance |
| B. | screw gauge |
| C. | Vernier calipers |
| D. | stop watch |
| Answer» C. Vernier calipers | |
| 292. |
While measuring length the eye must be kept |
| A. | above the scale |
| B. | at an acute angle |
| C. | horizontal with scale |
| D. | none of above |
| Answer» B. at an acute angle | |
| 293. |
Amount of a substance in terms of numbers is measured in |
| A. | gram |
| B. | kilograms |
| C. | mole |
| D. | newton |
| Answer» D. newton | |
| 294. |
A modified type of beam balance used to measure small masses by comparison with greater accuracy is known as |
| A. | Vernier calipers |
| B. | stop watch |
| C. | physical balance |
| D. | screw gauge |
| Answer» D. screw gauge | |
| 295. |
The knowledge gained through observations and experiments is called |
| A. | Mathematics |
| B. | Science |
| C. | Economics |
| D. | Geometry |
| Answer» C. Economics | |
| 296. |
Counting is not simply |
| A. | measuring |
| B. | adding |
| C. | subtracting |
| D. | multiplying |
| Answer» B. adding | |
| 297. |
The study of the charged at rest and in motion, their effects and their relationship with magnetism is called |
| A. | mechanics |
| B. | plasma physics |
| C. | atomic physics |
| D. | electricity and magnetism |
| Answer» E. | |
| 298. |
If zero line of the Vernier scale coincides with the zero of the main scale, then zero error is |
| A. | positive |
| B. | zero |
| C. | negative |
| D. | one |
| Answer» C. negative | |
| 299. |
If circular scale has crossed the index line then zero error of screw gauge is |
| A. | negative |
| B. | positive |
| C. | 0 |
| D. | all of above |
| Answer» B. positive | |
| 300. |
The significant digits in 275.00 are |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 4 |
| Answer» D. 4 | |