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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.
| 451. |
The significant digits in 3587 are |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 0 |
| Answer» B. 3 | |
| 452. |
F zero lines of the Vernier scale are on the left side of the zero of the main scale, then zero error will be |
| A. | zero |
| B. | positive |
| C. | negative |
| D. | one |
| Answer» D. one | |
| 453. |
A number 62580 can be expressed in scientific notation as |
| A. | 6.258 × 103 |
| B. | 6.258 × 102 |
| C. | 6.258 × 104 |
| D. | 6.258 × 105 |
| Answer» D. 6.258 × 105 | |
| 454. |
We can express 200.7 in scientific notation as |
| A. | 2.007 × 10³ |
| B. | 2.007 × 10² |
| C. | 27 × 10³ |
| D. | 200.7 × 10² |
| Answer» C. 27 × 10³ | |
| 455. |
In screw gauge, if zero of circular scale is behind the index line, then the zero error will be |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | one |
| Answer» B. negative | |
| 456. |
All the quantities that are measurable are called |
| A. | Physical quantities |
| B. | thermodynamics |
| C. | non-physical quantities |
| D. | mechanics |
| Answer» B. thermodynamics | |
| 457. |
The smallest possible division up to which an instrument can measure is called |
| A. | large count |
| B. | least count |
| C. | small count |
| D. | shortest length |
| Answer» C. small count | |
| 458. |
Length, mass, electric current, time, intensity of light and the amount of substance are the examples of |
| A. | base quantities |
| B. | derived quantities |
| C. | prefixes |
| D. | quartile quantities |
| Answer» B. derived quantities | |
| 459. |
The prefix for 109 is |
| A. | giga |
| B. | Milli |
| C. | nano |
| D. | pico |
| Answer» B. Milli | |
| 460. |
GPS consists of |
| A. | 23 earth satellites |
| B. | 24 earth satellites |
| C. | 25 earth satellites |
| D. | 26 earth satellites |
| Answer» C. 25 earth satellites | |
| 461. |
The mass of the Earth is |
| A. | 6 × 1026 |
| B. | 6 × 1024 |
| C. | 8 × 1024 |
| D. | 7 × 1024 |
| Answer» C. 8 × 1024 | |
| 462. |
With mass ‘m’, altitude ‘h’, radius ro and velocity vo, the centripetal force is equal to |
| A. | Fc =( mvo²) ⁄ ro |
| B. | Fc =( mvo) ⁄ ro |
| C. | Fc =( mro²) ⁄ vo |
| D. | Fc =( mvo² + ro) |
| Answer» B. Fc =( mvo) ⁄ ro | |
| 463. |
The distance of moon from the Earth is |
| A. | 395,000 km |
| B. | 420,000 km |
| C. | 380,000 km |
| D. | 450,000 km |
| Answer» D. 450,000 km | |
| 464. |
In SI units, the value of gravitational constant(G) is |
| A. | 6.673 x10-11 |
| B. | 8.673 x105 |
| C. | 6.673 x105 |
| D. | 4.673 x105 |
| Answer» B. 8.673 x105 | |
| 465. |
From the following, the lightest substance is |
| A. | aluminum |
| B. | copper |
| C. | mercury |
| D. | lead |
| Answer» B. copper | |
| 466. |
The mass per unit volume of a substance is called its |
| A. | density |
| B. | power |
| C. | stress |
| D. | displacement |
| Answer» B. power | |
| 467. |
Atmospheric pressure acts in |
| A. | specific direction |
| B. | horizontally |
| C. | vertically |
| D. | all of above |
| Answer» E. | |
| 468. |
Liquids have attractive forces |
| A. | more than solids |
| B. | less than gases |
| C. | less than plasma |
| D. | less than solids |
| Answer» E. | |
| 469. |
The ratio of stress to strain is |
| A. | 1 |
| B. | 0 |
| C. | 3 |
| D. | constant |
| Answer» E. | |
| 470. |
Plasma is highly |
| A. | conducting |
| B. | non conducting |
| C. | resistive |
| D. | insulator |
| Answer» B. non conducting | |
| 471. |
As compared to water, mercury is denser |
| A. | 12 times |
| B. | 11.5 times |
| C. | 15 times |
| D. | 13.6 times |
| Answer» E. | |
| 472. |
(Change in length/original length) is equal to |
| A. | tensile strain |
| B. | zero strain |
| C. | constant strain |
| D. | former strain |
| Answer» B. zero strain | |
| 473. |
The matter can be filled in any container of any shape is |
| A. | liquids only |
| B. | solid only |
| C. | gas |
| D. | liquids and solid |
| Answer» E. | |
| 474. |
The pressure is defined as the force acting per unit |
| A. | volume |
| B. | density |
| C. | area |
| D. | mass |
| Answer» D. mass | |
| 475. |
According to newton's 2nd law of motion, with mass ‘m’, velocity ‘v’ and radius ‘r’ the centripetal force is equal to |
| A. | mv² ×r |
| B. | (mv²) ⁄ r |
| C. | mv² + r |
| D. | mv² - r |
| Answer» C. mv² + r | |
| 476. |
The tires roll over easily on |
| A. | smooth surface |
| B. | rough surface |
| C. | on coal tar |
| D. | all of above |
| Answer» B. rough surface | |
| 477. |
If the coefficient of friction between wood and marble is 0.6,mass of wood is 6 kg, then the force of friction between the wood and the horizontal marble floor will be |
| A. | 36 N |
| B. | 30 N |
| C. | 40 N |
| D. | 23 N |
| Answer» B. 30 N | |
| 478. |
The quantity of matter possessed by the body is known as |
| A. | mass |
| B. | weight |
| C. | inertia |
| D. | force |
| Answer» B. weight | |
| 479. |
Newton is denoted by |
| A. | n |
| B. | N |
| C. | w |
| D. | R |
| Answer» C. w | |
| 480. |
If the sum of clockwise momentum is equal to sum of anti-clockwise momentum then body is in |
| A. | zero gravity |
| B. | balanced |
| C. | imbalanced |
| D. | non equilibrium |
| Answer» C. imbalanced | |
| 481. |
The sum of two or more forces is called |
| A. | resultant forces |
| B. | like parallel forces |
| C. | unlike forces |
| D. | positive forces |
| Answer» B. like parallel forces | |
| 482. |
A couple is produced by |
| A. | one unlike parallel force |
| B. | two unlike parallel forces |
| C. | like parallel force |
| D. | two alike parallel force |
| Answer» C. like parallel force | |
| 483. |
Torque is turning effect of |
| A. | force |
| B. | moment of force |
| C. | line of action of force |
| D. | frictional force |
| Answer» B. moment of force | |
| 484. |
To lower their center of mass, circus artists use |
| A. | short poles |
| B. | long poles |
| C. | heavy costumes |
| D. | light costumes |
| Answer» C. heavy costumes | |
| 485. |
The constant for gravitation is denoted universally by |
| A. | g |
| B. | r |
| C. | G |
| D. | R |
| Answer» D. R | |
| 486. |
The moon completes one revolution around the Earth in |
| A. | 30 days |
| B. | 24 days |
| C. | 26 days |
| D. | 27.3 days |
| Answer» E. | |
| 487. |
If the mass of earth is 6.0 * 1024 and its radius is 6400 km then value of g at an altitude of 1000 km is |
| A. | 7 ms-1 |
| B. | 7 ms-2 |
| C. | 7.3 ms-1 |
| D. | 7.3 ms-2 |
| Answer» E. | |
| 488. |
Value of g increases with the |
| A. | decrease in altitude |
| B. | increase in altitude |
| C. | increase in body mass |
| D. | decrease in body mass |
| Answer» B. increase in altitude | |
| 489. |
The gravitational force between two spheres of masses 1000 kg kept 1m apart is |
| A. | 10 N |
| B. | 6.673 * 10-5 |
| C. | 12 N |
| D. | 5 N |
| Answer» C. 12 N | |
| 490. |
On the Kelvin 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 | |
| 491. |
The heat require to boil 2.5 liters of water at 20 °C is |
| A. | 840 kJ |
| B. | 850 kJ |
| C. | 860 kJ |
| D. | 890 kJ |
| Answer» B. 850 kJ | |
| 492. |
Mercury-in-glass thermometers are used to measure temperature between |
| A. | −20 °C to 150 °C |
| B. | −10 °C to 270 °C |
| C. | −10 °C to 150 °C |
| D. | −10 °C to 180 °C |
| Answer» D. −10 °C to 180 °C | |
| 493. |
The temperature coefficient of volume expansion is denoted by |
| A. | β |
| B. | α |
| C. | π |
| D. | ω |
| Answer» B. α | |
| 494. |
If we convert 400K into the Celsius scale of temperature, we get |
| A. | 100 °C |
| B. | 0 °C |
| C. | 150 °C |
| D. | 127 °C |
| Answer» E. | |
| 495. |
Substance that show a change with temperature can be used as a |
| A. | energy observer |
| B. | plasma material |
| C. | capacity calculator |
| D. | thermometric material |
| Answer» E. | |
| 496. |
The sum of kinetic energy and potential energy associated with the atoms, particles and molecules of a body is called its |
| A. | negative energy |
| B. | external energy |
| C. | internal energy |
| D. | constant energy |
| Answer» D. constant energy | |
| 497. |
The change in length of a solid is directly proportional to its |
| A. | original area |
| B. | original width |
| C. | original length |
| D. | original shape |
| Answer» D. original shape | |
| 498. |
The quantity of heat that changes unit mass of a liquid completely into gas at its boiling point without any change in its temperature is called its |
| A. | latent heat of vaporization |
| B. | latent heat of fusion |
| C. | latent heat of energy |
| D. | latent heat of pressure |
| Answer» B. latent heat of fusion | |
| 499. |
Thermal expansion results in |
| A. | increase in length |
| B. | increase in breadth |
| C. | increase in thickness |
| D. | all of above |
| Answer» E. | |
| 500. |
Weight is measured by a |
| A. | beam balance |
| B. | spring balance |
| C. | screw gauge |
| D. | physical balance |
| Answer» C. screw gauge | |