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.
| 1. |
A cyclist of mass 30 kg exerts a force of 250 N to move his cycle. The acceleration is 4 ms−2. The force of friction between the road and tires will be |
| A. | 120 N |
| B. | 130 N |
| C. | 150N |
| D. | 115 N |
| Answer» C. 150N | |
| 2. |
The banking of road prevents |
| A. | sliding of vehicle |
| B. | rolling of vehicle |
| C. | skidding of vehicle |
| D. | over speeding of vehicle |
| Answer» D. over speeding of vehicle | |
| 3. |
To every action, there is always an equal but opposite reaction, this statement is known as |
| A. | newton's 2nd law of motion |
| B. | newton's 1st law of motion |
| C. | newton's 3rd law of motion |
| D. | law of momentum |
| Answer» D. law of momentum | |
| 4. |
If we place some coins over the paper strip and pull it with a jerk, then coins don't fall off because of |
| A. | friction |
| B. | inertia |
| C. | resistance |
| D. | force |
| Answer» C. resistance | |
| 5. |
If the string is stretched by two opposite forces of 10 N then tension in the string is |
| A. | 5N |
| B. | 20 N |
| C. | 10 N |
| D. | zero |
| Answer» E. | |
| 6. |
The velocity of the geostationary satellite to earth is |
| A. | 10 ms-1 |
| B. | 15 ms-1 |
| C. | zero |
| D. | 1 ms-1 |
| Answer» D. 1 ms-1 | |
| 7. |
The first man who came up with the idea of gravity was |
| A. | Henry Briggs |
| B. | John Napier |
| C. | Jobst Burgi |
| D. | Isaac Newton |
| Answer» E. | |
| 8. |
To complete one revolution around the Earth, the communication satellites take |
| A. | 24 hours |
| B. | 36 hours |
| C. | 48 hours |
| D. | 72 hours |
| Answer» B. 36 hours | |
| 9. |
The gravitation is inversely related to |
| A. | distance between masses |
| B. | product of magnitude of masses |
| C. | direction of masses |
| D. | square of distance between masses |
| Answer» E. | |
| 10. |
An object that revolves around a planet is called a |
| A. | robot |
| B. | modulus |
| C. | solar cars |
| D. | satellite |
| Answer» E. | |
| 11. |
The flying speed of a falcon is |
| A. | 100 kmh-1 |
| B. | 200 kmh-1 |
| C. | 50 kmh-1 |
| D. | 500 kmh-1 |
| Answer» C. 50 kmh-1 | |
| 12. |
The gravitational acceleration is the acceleration of bodies when they are in |
| A. | ground |
| B. | air |
| C. | freely falling |
| D. | all of above |
| Answer» D. all of above | |
| 13. |
Gravitational acceleration for the bodies falling freely is |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | always equal to one a |
| Answer» B. negative | |
| 14. |
Scalar quantities are completely described by their |
| A. | unit |
| B. | area |
| C. | direction |
| D. | magnitude |
| Answer» E. | |
| 15. |
Speed × time is equal to |
| A. | displacement |
| B. | distance |
| C. | velocity |
| D. | position |
| Answer» C. velocity | |
| 16. |
The matter is made up of |
| A. | atoms |
| B. | molecules |
| C. | ions |
| D. | cations |
| Answer» C. ions | |
| 17. |
A machine which works on Pascal's law is known as |
| A. | Vernier caliper |
| B. | Hydraulic press |
| C. | barometer |
| D. | screw gauge |
| Answer» C. barometer | |
| 18. |
Plasma consists of |
| A. | atoms |
| B. | ions |
| C. | molecules |
| D. | nuclei |
| Answer» C. molecules | |
| 19. |
The mass of 150 cm³ of stone is 400 g. Its density is |
| A. | 3.2 g cm-3 |
| B. | 2.6 g cm-3 |
| C. | 4 g cm-3 |
| D. | 3.5 g cm-3 |
| Answer» C. 4 g cm-3 | |
| 20. |
The formula we use to find stress is |
| A. | area / force |
| B. | force / area |
| C. | force + area |
| D. | force × area |
| Answer» C. force + area | |
| 21. |
The study of the internal structure of the Earth is known as |
| A. | mechanics |
| B. | nuclear physics |
| C. | atomic physics |
| D. | geophysics |
| Answer» E. | |
| 22. |
When a standard is set for a quantity, then the standard quantity is called a |
| A. | amount |
| B. | rate |
| C. | prefix |
| D. | unit |
| Answer» E. | |
| 23. |
By using prefixes, we can write 335 × 10-8 s as |
| A. | 0.335 µs |
| B. | 33.5 µs |
| C. | 335 µs |
| D. | 3.35 µs |
| Answer» E. | |
| 24. |
The smallest change a sensitive beam balance can record is |
| A. | 100 mg |
| B. | 10 mg |
| C. | 50 mg |
| D. | 1 mg |
| Answer» B. 10 mg | |
| 25. |
Physical sciences were divided into |
| A. | 4 disciplines |
| B. | 3 disciplines |
| C. | 5 disciplines |
| D. | 6 disciplines |
| Answer» D. 6 disciplines | |
| 26. |
The temperature of land rises more quickly than that of the sea because the specific heat of soil is |
| A. | more than water |
| B. | less than water |
| C. | equal to water |
| D. | neutral |
| Answer» C. equal to water | |
| 27. |
The coefficient of volume expansion of solids is |
| A. | greater than liquids |
| B. | equal to gases |
| C. | less than liquids |
| D. | equal to liquids |
| Answer» D. equal to liquids | |
| 28. |
Melting point is also known as |
| A. | fusion point |
| B. | constant point |
| C. | boiling point |
| D. | freezing point |
| Answer» B. constant point | |
| 29. |
The melting point of water is |
| A. | 323 °C |
| B. | 100 °C |
| C. | 273 °C |
| D. | 0 °C |
| Answer» E. | |
| 30. |
On heating, the amplitude of vibration of the atoms or molecules of an object |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | remain same |
| Answer» B. decreases | |
| 31. |
Land and sea breezes are the result of |
| A. | fusion |
| B. | convection |
| C. | radiation |
| D. | conduction |
| Answer» C. radiation | |
| 32. |
The heat transfer from one place to another takes place through |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | all of above |
| Answer» E. | |
| 33. |
The rate of flow of heat across the opposite faces of a meter cube of a substance maintained at the temperature difference of 1 kelvin is called its |
| A. | thermal radiation |
| B. | flow of energy |
| C. | thermal conductivity |
| D. | convection |
| Answer» D. convection | |
| 34. |
Transfer of heat by actual movement of molecules from a hot place to a cold place is known as |
| A. | radiation |
| B. | conduction |
| C. | convection |
| D. | fusion |
| Answer» D. fusion | |
| 35. |
Thermal energy from a hot body flows to a cold body in the form of |
| A. | sound |
| B. | signals |
| C. | heat |
| D. | waves |
| Answer» D. waves | |
| 36. |
An object tied with string and is hung vertically is an example of |
| A. | parallel forces |
| B. | unlike parallel forces |
| C. | like parallel forces |
| D. | tension in string |
| Answer» C. like parallel forces | |
| 37. |
The forces that are parallel to each other and have the same direction are called |
| A. | positive forces |
| B. | negative forces |
| C. | unlike parallel forces |
| D. | like parallel forces |
| Answer» E. | |
| 38. |
A force of 120 N is applied perpendicularly on a spanner at a distance of 9 cm from a nut. The torque produced by the force will be |
| A. | 12 Nm |
| B. | 10.8 Nm |
| C. | 15 Nm |
| D. | 12.59 Nm |
| Answer» C. 15 Nm | |
| 39. |
A nut has been tightened by a force of 180 N using an 8 cm long spanner. What length of a spanner is required to loosen the same nut with 150 N force |
| A. | 11 cm |
| B. | 8.5 cm |
| C. | 9.6 cm |
| D. | 10.9 cm |
| Answer» D. 10.9 cm | |
| 40. |
The perpendicular distance between the axis of rotation and the line of action of the force is called the |
| A. | moment arm |
| B. | inertia |
| C. | velocity |
| D. | displacement |
| Answer» B. inertia | |
| 41. |
When a force acting on a body displaces it in the direction of a force than |
| A. | uniform velocity occurs |
| B. | uniform speed occurs |
| C. | work is done |
| D. | equilibrium take place |
| Answer» D. equilibrium take place | |
| 42. |
A moving car possesses |
| A. | sound energy |
| B. | mechanical energy |
| C. | heat energy |
| D. | chemical energy |
| Answer» C. heat energy | |
| 43. |
During the interconversion of energy from one form to other forms, the total energy at any time remains |
| A. | constant |
| B. | zero |
| C. | increasing |
| D. | decreasing |
| Answer» B. zero | |
| 44. |
The energy possessed by a body due to its position is called its |
| A. | heat energy |
| B. | kinetic energy |
| C. | potential energy |
| D. | chemical energy |
| Answer» D. chemical energy | |
| 45. |
The change in the quality of the environment that can be harmful and unpleasant for living things is called |
| A. | energy |
| B. | pollution |
| C. | revolution |
| D. | transformation |
| Answer» C. revolution | |
| 46. |
The rate of change of velocity is called |
| A. | speed |
| B. | distance |
| C. | force |
| D. | acceleration |
| Answer» E. | |
| 47. |
The types of motion are |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 48. |
The length of a path between 2 points is called |
| A. | displacement |
| B. | distance |
| C. | position |
| D. | velocity |
| Answer» D. velocity | |
| 49. |
The time taken by a train to slow down from 80 kmh-1 to 20 kmh-1 with a uniform deceleration of 2 ms-2 is |
| A. | 9 s |
| B. | 10 s |
| C. | 8.3 s |
| D. | 8.4 s |
| Answer» D. 8.4 s | |
| 50. |
If a block returns to its original position after slight tilt then it is in state of |
| A. | unstable equilibrium |
| B. | stable equilibrium |
| C. | neutral equilibrium |
| D. | weightlessness |
| Answer» C. neutral equilibrium | |