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.
| 501. |
The constant of friction is represented by |
| A. | ω |
| B. | δ |
| C. | σ |
| D. | μ |
| Answer» E. | |
| 502. |
(mass of a body × gravity) is equal to |
| A. | weight |
| B. | inertia |
| C. | force |
| D. | momentum |
| Answer» B. inertia | |
| 503. |
The motion of an object in a circular path is called |
| A. | circular motion |
| B. | translatory motion |
| C. | vibratory motion |
| D. | linear motion |
| Answer» B. translatory motion | |
| 504. |
The contact points between the two surfaces form a sort of |
| A. | cold welds |
| B. | hot welds |
| C. | strips |
| D. | momentum |
| Answer» B. hot welds | |
| 505. |
If a bus takes a sharp turn then passengers inside move outward due to |
| A. | force |
| B. | inertia |
| C. | normal force |
| D. | friction |
| Answer» C. normal force | |
| 506. |
The force that opposes the motion of moving objects is called |
| A. | friction |
| B. | velocity |
| C. | inertia |
| D. | position |
| Answer» B. velocity | |
| 507. |
In dryer, the water is pushed out of wet clothes due to |
| A. | abundance of centripetal force |
| B. | lack of centripetal force |
| C. | friction |
| D. | retarding force |
| Answer» C. friction | |
| 508. |
The friction offers by a slippery ground is |
| A. | very high |
| B. | very little |
| C. | very difficult |
| D. | circular |
| Answer» C. very difficult | |
| 509. |
The force with which the earth attracts the bodies towards its center is called |
| A. | mass |
| B. | inertia |
| C. | gravitational force |
| D. | weight |
| Answer» E. | |
| 510. |
The weight of 10apples in a bag is an example of |
| A. | like parallel forces |
| B. | unlike parallel forces |
| C. | force of tension |
| D. | friction |
| Answer» B. unlike parallel forces | |
| 511. |
The total torque produced in opening a nut from spanner is |
| A. | F * AB |
| B. | F * A |
| C. | F * B |
| D. | A * B |
| Answer» B. F * A | |
| 512. |
If the net force acting on the body is zero then the body is said to be |
| A. | imbalanced |
| B. | balanced |
| C. | in equilibrium |
| D. | not in equilibrium |
| Answer» D. not in equilibrium | |
| 513. |
Racing cars are made stable by |
| A. | decreasing their mass |
| B. | increasing their speed |
| C. | lowering their center of gravity |
| D. | decreasing their width |
| Answer» D. decreasing their width | |
| 514. |
A force of 10 N is making an angle of 30 ° with the horizontal. Its horizontal component will be |
| A. | 4 N |
| B. | 5 N |
| C. | 7 N |
| D. | 10 N |
| Answer» C. 7 N | |
| 515. |
On Fahrenheit scale, the intervals between lower and upper fixed points are divided into |
| A. | 100 equal parts |
| B. | 120 equal parts |
| C. | 180 equal parts |
| D. | 200 equal parts |
| Answer» D. 200 equal parts | |
| 516. |
When heating, nearly all the substances |
| A. | contract |
| B. | expands |
| C. | remains same |
| D. | changes nature |
| Answer» C. remains same | |
| 517. |
In an automobile, large amount of heat is produced by its engine due to which its temperature goes on |
| A. | constant rate |
| B. | up and down |
| C. | decreasing |
| D. | increasing |
| Answer» E. | |
| 518. |
The degree of hotness or coldness of a body is called its |
| A. | temperature |
| B. | energy |
| C. | density |
| D. | elasticity |
| Answer» B. energy | |
| 519. |
The temperature of water remains at 100 °C until |
| A. | it changes to solid |
| B. | it changes to steam |
| C. | it's density changes |
| D. | it's weight changes |
| Answer» C. it's density changes | |
| 520. |
The matter whose molecules have random motion and move with very high velocities is |
| A. | gas |
| B. | plasma |
| C. | solids |
| D. | liquid |
| Answer» B. plasma | |
| 521. |
The up thrust of water acting on a wooden cube of sides 10cm immersed completely in water is |
| A. | 5 N |
| B. | 10 N |
| C. | 3 N |
| D. | 2 N |
| Answer» C. 3 N | |
| 522. |
Stone, metal spoon, pencil are examples of |
| A. | liquids |
| B. | gases |
| C. | solids |
| D. | plasma |
| Answer» D. plasma | |
| 523. |
In SI units, the unit of pressure is |
| A. | Pa |
| B. | pi |
| C. | omega |
| D. | newton |
| Answer» B. pi | |
| 524. |
The density of mercury is |
| A. | 13.6 times of water |
| B. | 12 times of water |
| C. | 10 times of water |
| D. | 20 times of water |
| Answer» B. 12 times of water | |
| 525. |
The temperature at which a solid starts melting is called its |
| A. | constant point |
| B. | boiling point |
| C. | freezing point |
| D. | melting point |
| Answer» E. | |
| 526. |
The temperature on kelvin scale of temperature when it is 15 °C on Celsius scale should be |
| A. | 273 K |
| B. | 288 K |
| C. | 180 K |
| D. | 258 K |
| Answer» C. 180 K | |
| 527. |
A thermometer should be |
| A. | visible |
| B. | have high boiling point |
| C. | small specific heat |
| D. | all of above |
| Answer» E. | |
| 528. |
To change the state of matter thermal energy is |
| A. | added only |
| B. | removed only |
| C. | constant |
| D. | added and removed |
| Answer» E. | |
| 529. |
On Celsius scale, the upper fixed point is marked as |
| A. | 32 °C |
| B. | 212 °C |
| C. | 100 °C |
| D. | 0 °C |
| Answer» D. 0 °C | |
| 530. |
Heat is transferred in solids by |
| A. | radiation |
| B. | convection |
| C. | conduction |
| D. | fusion |
| Answer» D. fusion | |
| 531. |
The heat from the fireplace reaches us directly in the form of waves called |
| A. | convection |
| B. | radiation |
| C. | conduction |
| D. | fusion |
| Answer» C. conduction | |
| 532. |
If the temperature difference between hold and cold faces of the solids is greater, the rate of flow of heat will be |
| A. | zero |
| B. | constant |
| C. | smaller |
| D. | greater |
| Answer» E. | |
| 533. |
If the length between the hot and cold ends of the solid is larger, the rate of flow of heat will be |
| A. | greater |
| B. | smaller |
| C. | zero |
| D. | constant |
| Answer» C. zero | |
| 534. |
The thermal conductivity of plastic foam is |
| A. | 0.05 |
| B. | 0.03 |
| C. | 0.02 |
| D. | 0.06 |
| Answer» C. 0.02 | |
| 535. |
Fossil fuels are burnt to produce electricity in |
| A. | thermal power |
| B. | chemical power |
| C. | nuclear power |
| D. | solar cars |
| Answer» B. chemical power | |
| 536. |
Fission and fusion are called |
| A. | molecular reactions |
| B. | potential reactions |
| C. | nuclear reactions |
| D. | heat reactions |
| Answer» D. heat reactions | |
| 537. |
One horsepower is equal to |
| A. | 790 watts |
| B. | 700 watts |
| C. | 720 watts |
| D. | 746 watts |
| Answer» E. | |
| 538. |
The energy possessed by a body both due to its motion or position is termed as |
| A. | heat energy |
| B. | chemical energy |
| C. | mechanical energy |
| D. | electrical energy |
| Answer» D. electrical energy | |
| 539. |
The burning of coal, wood or natural gas and releasing of heat and light energy in the air is a |
| A. | nuclear reaction |
| B. | kinetic reaction |
| C. | chemical reaction |
| D. | potential reaction |
| Answer» D. potential reaction | |
| 540. |
Gravitational acceleration for the bodies moving up is |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | one |
| Answer» C. zero | |
| 541. |
A physical quantity which can be completely described by its magnitude only is called |
| A. | scalar |
| B. | vector |
| C. | displacement |
| D. | velocity |
| Answer» B. vector | |
| 542. |
If a body doesn't rotate then its motion is |
| A. | Vibratory |
| B. | rotatory |
| C. | circulatory |
| D. | Translational |
| Answer» E. | |
| 543. |
If the line of motion is curved then body exhibit |
| A. | linear motion |
| B. | rotatory motion |
| C. | translational motion |
| D. | vibratory motion |
| Answer» D. vibratory motion | |
| 544. |
A bus starts from rest with the acceleration of 0.5 ms−2. If it has moved through 100 m, then its speed will be |
| A. | 23 kmh−1 |
| B. | 25 kmh−1 |
| C. | 34 kmh−1 |
| D. | 36 kmh−1 |
| Answer» E. | |
| 545. |
Law of inertia is also known as newton's |
| A. | 1st law of motion |
| B. | 2nd law of motion |
| C. | 3rd law of motion |
| D. | all of above |
| Answer» B. 2nd law of motion | |
| 546. |
A force of 15 N moves a body with an acceleration of 3 ms−2. Its mass is |
| A. | 10 kg |
| B. | 8 kg |
| C. | 12 kg |
| D. | 5 kg |
| Answer» E. | |
| 547. |
If the pressing force on the sliding surfaces is greater, then friction will be |
| A. | small |
| B. | constant |
| C. | zero |
| D. | greater |
| Answer» E. | |
| 548. |
When we walk or run, to push the ground backward we need |
| A. | inertia |
| B. | position |
| C. | friction |
| D. | velocity |
| Answer» D. velocity | |
| 549. |
A group of interacting bodies on which no external force is acting is known as |
| A. | sexasigmal system |
| B. | isolated system |
| C. | SGS system |
| D. | none of above |
| Answer» C. SGS system | |
| 550. |
On the Celsius scale, the lower fixed point is marked as |
| A. | 100 °C |
| B. | 0 °C |
| C. | 32 °C |
| D. | 212 °C |
| Answer» C. 32 °C | |