MCQOPTIONS
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MCQOPTIONS
This section includes 1134 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Transformers only work with |
| A. | direct current (DC) |
| B. | alternating current (AC) |
| C. | charges |
| D. | radioactive substances |
| Answer» C. charges | |
| 2. |
A magnetic field must produce a/an |
| A. | electric current |
| B. | field coil |
| C. | pole |
| D. | split |
| Answer» B. field coil | |
| 3. |
The magnetic field produced either by permanent magnets or by an electromagnet called a |
| A. | magnetic field |
| B. | field coil |
| C. | circuit breaker |
| D. | fuse |
| Answer» C. circuit breaker | |
| 4. |
In the transformer, if the secondary voltage is more than the primary voltage then it is called |
| A. | step up transformer |
| B. | step down transformer |
| C. | inductor |
| D. | resistor |
| Answer» B. step down transformer | |
| 5. |
The total force acting on the armature can be increased by increasing the |
| A. | coil's current |
| B. | number of turns of coil |
| C. | area of coil |
| D. | all of above |
| Answer» E. | |
| 6. |
Such use of the computer through which we can write a letter, article, book, or prepare a report is called |
| A. | operating system |
| B. | word processing |
| C. | data management |
| D. | managing system |
| Answer» C. data management | |
| 7. |
A CD can store up to |
| A. | 680 Mb of data |
| B. | 17 Gb of data |
| C. | 780 Mb of data |
| D. | 1 Gb of data |
| Answer» B. 17 Gb of data | |
| 8. |
A small magnetically sensitive, flexible plastic wafer housed in a plastic case is called |
| A. | audio cassette |
| B. | floppy disk |
| C. | hard disk |
| D. | compact disc |
| Answer» C. hard disk | |
| 9. |
A rigid, magnetically sensitive disk that spins rapidly and continuously inside the computer housing is termed as |
| A. | audio cassette |
| B. | floppy disk |
| C. | hard disk |
| D. | compact disc |
| Answer» D. compact disc | |
| 10. |
As per Michael Faraday, if the forefinger points the direction of the magnetic field, the middle finger in the direction of the current, then the thumb would indicate the direction of |
| A. | force acting on the conductor |
| B. | magnetic field |
| C. | electric field |
| D. | none of above |
| Answer» B. magnetic field | |
| 11. |
A coil of wire consisting of many loops is known as |
| A. | magnet |
| B. | solenoid |
| C. | photon |
| D. | pole |
| Answer» C. photon | |
| 12. |
If we increase the number of loops, the turning effect would |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | become zero |
| Answer» B. decrease | |
| 13. |
The phenomenon of induction of induced current in one coil due to change of current in a neighboring coil is called |
| A. | flow of power in fuse |
| B. | mutual induction |
| C. | speed of relative motion of coil |
| D. | speed of relative motion of magnet |
| Answer» C. speed of relative motion of coil | |
| 14. |
If the AC source is 240 V and a transformer supplies 12 V to a model train which draws a current of 0.8 A then primary current is |
| A. | 0.4 A |
| B. | 0.04 A |
| C. | 0.041666667 |
| D. | 0.083333333 |
| Answer» C. 0.041666667 | |
| 15. |
The branch of applied physics which deals with the control of motion of electrons using different devices is known as |
| A. | nuclear physics |
| B. | electrostatics |
| C. | electromagnetism |
| D. | electronics |
| Answer» E. | |
| 16. |
An LDR in house safety alarm causes |
| A. | low input on light |
| B. | high input on light |
| C. | high resistance |
| D. | all of above |
| Answer» C. high resistance | |
| 17. |
The branch of electronics consisting of circuits which process digital quantities is called |
| A. | digital atoms |
| B. | digital statistics |
| C. | digital electronics |
| D. | digital magnetics |
| Answer» D. digital magnetics | |
| 18. |
Digital electronics uses the digits |
| A. | 0, 1 |
| B. | 1, 2 |
| C. | 1, 10 |
| D. | 0, 10 |
| Answer» B. 1, 2 | |
| 19. |
The electronic circuit which implements the OR operation is known as |
| A. | AND gate |
| B. | NAND gate |
| C. | OR gate |
| D. | NOT gate |
| Answer» D. NOT gate | |
| 20. |
Sound energy passing per second through a unit area held perpendicular is called |
| A. | intensity |
| B. | frequency |
| C. | amplitude |
| D. | quality |
| Answer» B. frequency | |
| 21. |
The loudness of sound varies directly with the vibrating body's |
| A. | intensity |
| B. | amplitude |
| C. | pitch |
| D. | quality |
| Answer» C. pitch | |
| 22. |
Sound waves are produced by |
| A. | linear motion |
| B. | circular motion |
| C. | vibrating bodies |
| D. | transitional motion |
| Answer» D. transitional motion | |
| 23. |
The human ear responds to intensities in range |
| A. | 10-12Wm-2 to 1Wm-2 |
| B. | 15Wm-2 to 18Wm-2 |
| C. | 108Wm-2 to 2Wm-2 |
| D. | 10-3Wm-1 to 10-6Wm-1 |
| Answer» B. 15Wm-2 to 18Wm-2 | |
| 24. |
On applying an external magnetic field, free electrons move |
| A. | randomly |
| B. | in a specific direction |
| C. | circular |
| D. | against magnetic field |
| Answer» C. circular | |
| 25. |
The current which does not change its direction of flow is called |
| A. | negative current |
| B. | direct current |
| C. | alternative current |
| D. | fixed current |
| Answer» C. alternative current | |
| 26. |
If we double both current and voltage keeping the resistance constant then power is |
| A. | unchanged |
| B. | halves |
| C. | doubles |
| D. | quadruples |
| Answer» E. | |
| 27. |
A 60 W light bulb converts electrical energy into light and heat energy in each second of |
| A. | 30 J |
| B. | 60 J |
| C. | 120 J |
| D. | 20 J |
| Answer» C. 120 J | |
| 28. |
The electric power enters our houses through |
| A. | 2 wires |
| B. | 1 wire |
| C. | 4 wires |
| D. | 3 wires |
| Answer» E. | |
| 29. |
If we grip the coil with our right hand by curling our fingers in the direction of the conventional current, our thumb will indicate the coil's |
| A. | west pole |
| B. | south pole |
| C. | east pole |
| D. | north pole |
| Answer» E. | |
| 30. |
An ideal transformer dissipates by itself |
| A. | low power |
| B. | high power |
| C. | no power |
| D. | none of above |
| Answer» D. none of above | |
| 31. |
The type of temporary magnet, which is created when current flows through a coil is called an |
| A. | electromagnet |
| B. | mechanical energy |
| C. | magnetism |
| D. | potential difference |
| Answer» B. mechanical energy | |
| 32. |
At the generating station, the AC voltage is |
| A. | stepped down |
| B. | remains constant |
| C. | stepped up |
| D. | none of above |
| Answer» D. none of above | |
| 33. |
If the current in one coil becomes steady then magnetic field lines become |
| A. | zero |
| B. | constant |
| C. | less than before |
| D. | more than before |
| Answer» B. constant | |
| 34. |
A force that is always pushed or pulls the object performing oscillatory motion towards the mean position is called |
| A. | restoring force |
| B. | net force |
| C. | negative force |
| D. | zero force |
| Answer» B. net force | |
| 35. |
If the spring is stretched or compressed through a small displacement x from its mean position, then on mass it exerts a |
| A. | strain |
| B. | stress |
| C. | energy |
| D. | force |
| Answer» E. | |
| 36. |
The motion of particles about their mean position in regular intervals of time is called |
| A. | wave |
| B. | frequency |
| C. | gravity |
| D. | resistance |
| Answer» B. frequency | |
| 37. |
The acceleration and displacement of a mass attached to spring is |
| A. | Inversely proportional to each other |
| B. | Directly proportional to each other |
| C. | Inversely related to each other |
| D. | Directly related to each other |
| Answer» C. Inversely related to each other | |
| 38. |
An earthquake produces waves through the crust of the Earth in the form of |
| A. | longitudinal waves |
| B. | mechanical waves |
| C. | electromagnetic waves |
| D. | seismic waves |
| Answer» E. | |
| 39. |
If the angle of incidence 'i&rsquo increases, the angle of refraction 'r&rsquo |
| A. | also increases |
| B. | remains constant |
| C. | becomes zero |
| D. | decreases |
| Answer» B. remains constant | |
| 40. |
The midpoint of the curved surface of a spherical mirror is called |
| A. | radius of curvature |
| B. | pole |
| C. | center of curvature |
| D. | focal length |
| Answer» C. center of curvature | |
| 41. |
When light passes through a prism it deviates from its original path because of |
| A. | reflection |
| B. | refraction |
| C. | defraction |
| D. | acoustics |
| Answer» C. defraction | |
| 42. |
An image of a statue appears to be 12.6 cm behind a concave mirror with a focal length of 14.5 cm. The distance between the mirror and the statue is |
| A. | 6.74 cm |
| B. | 9.82 cm |
| C. | 4.56 cm |
| D. | 11.6 cm |
| Answer» B. 9.82 cm | |
| 43. |
If the angle of incidence becomes larger than the critical angle then the phenomena of |
| A. | reflection occurs |
| B. | refraction occurs |
| C. | total internal reflection occurs |
| D. | none of above |
| Answer» D. none of above | |
| 44. |
If the price of a unit is Rs.15 then calculate the one month cost of using 60 W energy saver for 10 hours daily. |
| A. | Rs. 250 |
| B. | Rs. 180 |
| C. | Rs. 270 |
| D. | Rs. 540 |
| Answer» D. Rs. 540 | |
| 45. |
The unit of electric power is |
| A. | ms |
| B. | watt |
| C. | Pascal |
| D. | farad |
| Answer» C. Pascal | |
| 46. |
A pipe with a larger cross-sectional area than other offers |
| A. | small resistance |
| B. | large resistance |
| C. | equal resistance |
| D. | variable resistance |
| Answer» B. large resistance | |
| 47. |
The current in electrolyte flows due to |
| A. | positive ions only |
| B. | negative ions only |
| C. | electrons and protons |
| D. | positive and negative ions |
| Answer» E. | |
| 48. |
The value of resistance in insulators is |
| A. | small |
| B. | large |
| C. | zero |
| D. | can not be determined |
| Answer» C. zero | |
| 49. |
The spiral tracks encoded on the top surfaces of the compact disc (CD) are called |
| A. | pits |
| B. | lands |
| C. | patterns |
| D. | data |
| Answer» B. lands | |
| 50. |
It is also called the brain of the computer, as it translates instructions and performs calculations |
| A. | mouse |
| B. | Central processing unit(CPU) |
| C. | keyboard |
| D. | monitor |
| Answer» C. keyboard | |