MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the mass number of an element whose atom has two protons, two neutrons and two electrons? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 2. |
Isotopic properties are found? |
| A. | Element |
| B. | molecule |
| C. | nuclear |
| D. | Compound |
| Answer» B. molecule | |
| 3. |
What is atomic number called? |
| A. | sum the number of protons and neutrons |
| B. | the number of protons present in the nucleus |
| C. | the number of neutrons present in the nucleus |
| D. | sum the number of neutrons and electrons |
| Answer» C. the number of neutrons present in the nucleus | |
| 4. |
What are in the nucleus of an atom? |
| A. | neutrons and electrons |
| B. | protons and neutrons |
| C. | protons and electrons |
| D. | electrons only |
| Answer» C. protons and electrons | |
| 5. |
The laws of electromagnetic induction have been used to make which of the following? |
| A. | Straightener |
| B. | voltmeter |
| C. | electric motor |
| D. | generator |
| Answer» E. | |
| 6. |
The magnetic effect of electric current was first observed in? |
| A. | by henry |
| B. | by Oersted |
| C. | by faraday |
| D. | by volta |
| Answer» C. by faraday | |
| 7. |
Lenz's law is necessary for which of the following? |
| A. | Energy conservation |
| B. | conservation of mass |
| C. | linear momentum conservation |
| D. | Angular Momentum Conservation |
| Answer» B. conservation of mass | |
| 8. |
Electric motor works according to the following principle? |
| A. | Faraday's law |
| B. | Lenz's law |
| C. | rules of OM |
| D. | Fleming's law |
| Answer» B. Lenz's law | |
| 9. |
What is transformer? |
| A. | Converts DC to AC. |
| B. | Used to increase or decrease AC voltage |
| C. | converts AC voltage to DC voltage |
| D. | converts electrical energy into mechanical energy |
| Answer» C. converts AC voltage to DC voltage | |
| 10. |
The element of an electric heater is made of which of the following metals? |
| A. | nichrome |
| B. | aluminum |
| C. | copper |
| D. | none of the above |
| Answer» B. aluminum | |
| 11. |
Which of the following is a photosynthetic organelle? |
| A. | Stomata |
| B. | root |
| C. | green reaper |
| D. | leaf |
| Answer» D. leaf | |
| 12. |
What material is the wire generally used for installing a safety fuse made of? |
| A. | lead |
| B. | Nickel |
| C. | tin |
| D. | an alloy of tin and lead |
| Answer» E. | |
| 13. |
If 10 bulbs of 100 watts are lit for 1 hour per day, then the value of electrical energy used per day will be? |
| A. | 1 unit |
| B. | 100KWh |
| C. | 10 units |
| D. | 10KWh |
| Answer» B. 100KWh | |
| 14. |
Which of the following is not used as a cooking fuel? |
| A. | LPG |
| B. | biogas |
| C. | CNG |
| D. | Coal |
| Answer» D. Coal | |
| 15. |
Who has propounded the laws related to electrolysis? |
| A. | edison |
| B. | Om |
| C. | faraday |
| D. | volta |
| Answer» D. volta | |
| 16. |
What energy do solar cells convert solar energy into? |
| A. | in electrical energy |
| B. | in kinetic energy |
| C. | in mechanical energy |
| D. | in thermal energy |
| Answer» B. in kinetic energy | |
| 17. |
What is Denmark called? |
| A. | country of industries |
| B. | country of hydropower |
| C. | land of the winds |
| D. | land of minerals |
| Answer» D. land of minerals | |
| 18. |
Which alloy is used in electric fuse? |
| A. | Must have high specific resistance and low melting point |
| B. | Must have low specific resistance and high melting point |
| C. | Must have low specific resistance and low melting point |
| D. | Must have high specific resistance and high melting point |
| Answer» D. Must have high specific resistance and high melting point | |
| 19. |
The largest source of energy on earth is? |
| A. | Sun |
| B. | wood |
| C. | moon |
| D. | Coal |
| Answer» B. wood | |
| 20. |
Which metal is used to make solar cells? |
| A. | steel |
| B. | silicone |
| C. | abrakh |
| D. | glass |
| Answer» C. abrakh | |
| 21. |
Which of the following is renewable energy? |
| A. | Coal |
| B. | solar energy |
| C. | natural gas |
| D. | petrol |
| Answer» C. natural gas | |
| 22. |
What is considered the ultimate source of all forms of energy? |
| A. | Coal |
| B. | nuclear |
| C. | water |
| D. | Sun |
| Answer» E. | |
| 23. |
What type of energy is used to perform bodily functions? |
| A. | electrical energy |
| B. | solar energy |
| C. | muscular energy |
| D. | chemical energy |
| Answer» D. chemical energy | |
| 24. |
What is the coating of zinc over iron called? |
| A. | Galvanization |
| B. | Ion |
| C. | electroplating |
| D. | none of these |
| Answer» B. Ion | |
| 25. |
Who is the inventor of the voltaic cell? |
| A. | benjamin franklin |
| B. | Thomas Edison |
| C. | alejandro volta |
| D. | Kirchoff |
| Answer» D. Kirchoff | |
| 26. |
What energy is found in a dry cell? |
| A. | mechanical |
| B. | Electricity |
| C. | chemical |
| D. | electromagnetic |
| Answer» D. electromagnetic | |
| 27. |
What is needed to obtain nuclear energy? |
| A. | Chromium |
| B. | Silicon |
| C. | uranium |
| D. | aluminum |
| Answer» D. aluminum | |
| 28. |
The electrolyte used in a car battery is? |
| A. | sulfuric acid |
| B. | hydrochloric acid |
| C. | distilled water |
| D. | nitric acid |
| Answer» B. hydrochloric acid | |
| 29. |
What is the electrolyte in a uniform dry cell? |
| A. | zinc |
| B. | sulfuric acid |
| C. | ammonium chloride |
| D. | Carbon |
| Answer» D. Carbon | |
| 30. |
Are there fans, bulbs etc. installed in the houses? |
| A. | in rank order |
| B. | in mixed order |
| C. | in parallel |
| D. | in any order |
| Answer» D. in any order | |
| 31. |
What is the resistance of an ideal volt meter? |
| A. | Zero |
| B. | One |
| C. | less than 1 |
| D. | eternal |
| Answer» E. | |
| 32. |
If the resistances of 3 ohm and 6 ohm are added in parallel, then the total resistance will be |
| A. | 9 ohm |
| B. | 3 ohm |
| C. | 2 ohms |
| D. | 18 ohm |
| Answer» D. 18 ohm | |
| 33. |
What is the SI unit of specific resistance? |
| A. | Om |
| B. | ohm/meter |
| C. | ohm-meter |
| D. | ohm/meter |
| Answer» C. ohm-meter | |
| 34. |
What is the unit of potential difference? |
| A. | ampere |
| B. | Voltage |
| C. | Coulomb |
| D. | Om |
| Answer» C. Coulomb | |
| 35. |
If the same note is played on sitar and flute, then the sound produced by them can be distinguished due to the difference in the following? |
| A. | Tolerance, strength and quality |
| B. | Tolerance and strength only |
| C. | sound volume only |
| D. | sound quality only |
| Answer» E. | |
| 36. |
In electrical fittings a wire is grounded. this is due to ? |
| A. | If there is a short circuit, the stream will go into the ground. |
| B. | It does not dissipate electricity |
| C. | it completes the electric circuit |
| D. | This removes the vibration of electricity |
| Answer» B. It does not dissipate electricity | |
| 37. |
The speed of sound in air is 332 meters per second, if the pressure is doubled, then the speed of sound will be? |
| A. | 664 m / sec |
| B. | 332 m / sec |
| C. | 166 m / sec |
| D. | 100 m/s |
| Answer» C. 166 m / sec | |
| 38. |
The velocity of sound in air is approximately? |
| A. | 332 m/s. |
| B. | 220 m/s. |
| C. | 110 m/s. |
| D. | 232 m/s. |
| Answer» B. 220 m/s. | |
| 39. |
What is the frequency of sound waves in the audio range? |
| A. | 20 Hz to 20,000 Hz |
| B. | 0.5Hz to 5Hz |
| C. | 1 Hz to 10 Hz |
| D. | 20,000 Hz to 40,000 Hz |
| Answer» B. 0.5Hz to 5Hz | |
| 40. |
A noise level of 100 decibels corresponds to which of the following? |
| A. | audible sound |
| B. | simple conversation |
| C. | street noise |
| D. | machine shop noise |
| Answer» E. | |
| 41. |
Ultrasonics are sounds that have a frequency of? |
| A. | over 20,000 Hz |
| B. | over 10,000 Hz |
| C. | over 1,000 Hz |
| D. | none of these |
| Answer» B. over 10,000 Hz | |
| 42. |
The speed of sound is maximum in? |
| A. | in a vacuum |
| B. | in water |
| C. | in steel |
| D. | none of these |
| Answer» D. none of these | |
| 43. |
Are there sound waves? |
| A. | vertically |
| B. | oblique |
| C. | partially vertical, partially oblique |
| D. | sometimes vertical, sometimes oblique |
| Answer» B. oblique | |
| 44. |
Was the great scientist Archimedes related? |
| A. | from the UK |
| B. | from Germany |
| C. | U.N.S.E |
| D. | from Greece |
| Answer» E. | |
| 45. |
Which one of the following waves do bats use to identify obstacles in their flight path? |
| A. | infrared waves |
| B. | electromagnetic waves |
| C. | ultrasonic waves |
| D. | radio waves |
| Answer» D. radio waves | |
| 46. |
If the length of a simple pendulum is increased by 4%, then its period is |
| A. | will increase by 8% |
| B. | will increase by 2% |
| C. | will increase by 4% |
| D. | none of these |
| Answer» C. will increase by 4% | |
| 47. |
What is the unit of viscosity? |
| A. | poise |
| B. | pascal |
| C. | poijuli |
| D. | none of these |
| Answer» B. pascal | |
| 48. |
Are scientists related to buoyancy? |
| A. | Archimedes |
| B. | newton |
| C. | Louis Pasteur |
| D. | all of which |
| Answer» B. newton | |
| 49. |
Is a raindrop spherical? |
| A. | due to surface tension |
| B. | due to atmospheric friction of air |
| C. | due to the gravity of the round earth |
| D. | Due to the viscosity of rain water |
| Answer» B. due to atmospheric friction of air | |
| 50. |
Why do pendulum clocks become sluggish in summer? |
| A. | Because of the long summer days |
| B. | due to coil friction |
| C. | The length of the pendulum increases so that the time taken in unit oscillation increases |
| D. | The weight of the pendulum increases in heat |
| Answer» D. The weight of the pendulum increases in heat | |