MCQOPTIONS
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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. |
Coolis tube is used to produce |
| A. | adio waves |
| B. | icro waves |
| C. | -rays |
| D. | ama rays |
| Answer» D. ama rays | |
| 2. |
When a vehicle passes, TV reception gets distorted. This is because |
| A. | etal reflects radiowaves |
| B. | park plug creates electromagnetic disturbances |
| C. | ehicle pollution affects the performance of the TV components |
| D. | odern vehicles use electroignition system |
| Answer» C. ehicle pollution affects the performance of the TV components | |
| 3. |
Where do the electrical charges reside in a charged conductor? |
| A. | t the core |
| B. | hroughout the body |
| C. | epended upon the nature of the body |
| D. | uter surface of the body |
| Answer» E. | |
| 4. |
. . . . . . . . . exerts a force on anything that has an electric charge. |
| A. | lectric field |
| B. | lectrostatic force |
| C. | nductive field |
| D. | ll of the above |
| Answer» B. lectrostatic force | |
| 5. |
In a conductor |
| A. | here is no conduction band |
| B. | he forbidden energy gap is very wide |
| C. | he forbidden energy gap is very narrow |
| D. | he valence band and the conduction band overlap each other |
| Answer» E. | |
| 6. |
The reverse effect of X–ray emission is |
| A. | aman effect |
| B. | ompton effect |
| C. | eeman effect |
| D. | hotoelectric |
| Answer» E. | |
| 7. |
The force that binds the neutrons and protons in a nucleus is called as: |
| A. | eak Nuclear Force |
| B. | trong Nuclear Force |
| C. | lectromagnetic Force |
| D. | ravitational Force |
| Answer» C. lectromagnetic Force | |
| 8. |
What is the size of Electron as comapared to Proton and Neutron? |
| A. | /355 |
| B. | /1236 |
| C. | /1836 |
| D. | /1923 |
| Answer» D. /1923 | |
| 9. |
Who indirectly determined the mass of the electron by measuring the charge of the electron? |
| A. | homson |
| B. | illikan |
| C. | utherford |
| D. | instein |
| Answer» C. utherford | |
| 10. |
The wave like properties of electrons are useful in |
| A. | agnifying objects |
| B. | asers |
| C. | eather reports |
| D. | ll of the above |
| Answer» B. asers | |
| 11. |
A multimeter is used to measure |
| A. | urrent |
| B. | oltage |
| C. | esistance |
| D. | ll of the above |
| Answer» E. | |
| 12. |
The resistance of the human body (dry condition) is of the order of |
| A. | 01 Ohm |
| B. | 02 Ohm |
| C. | 03 Ohm |
| D. | one of these |
| Answer» E. | |
| 13. |
Which electromagnetic radiation is used for satellite communication ? |
| A. | ltraviolet |
| B. | nfrared |
| C. | adiowave |
| D. | illimeter wave |
| Answer» D. illimeter wave | |
| 14. |
What is a neuron ? |
| A. | asic unit of energy |
| B. | article released during radioactivity |
| C. | he anti-particle of neutron |
| D. | asic unit of nervous system |
| Answer» E. | |
| 15. |
Which of the following is preferred for accelerating electrons? |
| A. | etatron |
| B. | yclotron |
| C. | ynchrotron |
| D. | an de Graft Generator |
| Answer» B. yclotron | |
| 16. |
Who was the first scientist to discover Electrons? |
| A. | lbert Einstein |
| B. | saac Newton |
| C. | .C. Bose |
| D. | .J Thompson |
| Answer» E. | |
| 17. |
A transformer works on the principle of |
| A. | elf induction |
| B. | utual induction |
| C. | enerator |
| D. | nverter |
| Answer» C. enerator | |
| 18. |
A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct? |
| A. | 1>C2 |
| B. | 2>C1 |
| C. | 1pa = C2pg |
| D. | 1 = C2 |
| Answer» E. | |
| 19. |
Alternating current is converted into direct current by a |
| A. | ransformer |
| B. | ynamo |
| C. | scillator |
| D. | ectifier |
| Answer» E. | |
| 20. |
Stationary wave is formed by |
| A. | transverse wave superposing a longitudinal wave |
| B. | wo waves of the same speed superposing |
| C. | wo waves of same frequency travelling in the same direction |
| D. | wo waves of same frequency travelling in the opposite direction |
| Answer» E. | |
| 21. |
When a light wave is reflected from a mirror, there is a change in its |
| A. | requency |
| B. | mplitude |
| C. | avelength |
| D. | elocity |
| Answer» C. avelength | |
| 22. |
When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are |
| A. | ongitudinal |
| B. | ransverse |
| C. | oth longitudinal and transverse |
| D. | aves are not produced |
| Answer» C. oth longitudinal and transverse | |
| 23. |
The audio signals of TV are |
| A. | mplitude modulated |
| B. | requency modulated |
| C. | nmodulated |
| D. | elocity modulated |
| Answer» C. nmodulated | |
| 24. |
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct? |
| A. | t is narrow band of high-velocity wind. |
| B. | t follows the wave path near the tropopause at elevations of 8 km to 15 km. |
| C. | et streams are typically continuous over long distances. |
| D. | n summer, the polar front jet achieves its maximum force. |
| Answer» C. et streams are typically continuous over long distances. | |
| 25. |
If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound? |
| A. | : 1 |
| B. | : 1 |
| C. | : 16 |
| D. | : 4 |
| Answer» E. | |
| 26. |
Intensity of any wave is proportional to which of the following? |
| A. | mplitude |
| B. | quare of amplitude |
| C. | quare root of amplitude |
| D. | ube of amplitude |
| Answer» C. quare root of amplitude | |
| 27. |
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : |
| A. | 0 |
| B. | 0.2 |
| C. | 0.5 |
| D. | 0 |
| Answer» B. 0.2 | |
| 28. |
Matter waves are |
| A. | e Broglie waves |
| B. | lectromagnetic waves |
| C. | ransverse waves |
| D. | ongitudinal waves |
| Answer» B. lectromagnetic waves | |
| 29. |
What is found in frequency modulation ? |
| A. | ixed frequency |
| B. | ixed dimension |
| C. | hange in frequency and dimension |
| D. | hange in dimension only |
| Answer» B. ixed dimension | |
| 30. |
A television channel is characterised by |
| A. | requency of transmitted signal |
| B. | elocity of transmitted signal |
| C. | hysical dimension of television screen |
| D. | ize of picture tube |
| Answer» B. elocity of transmitted signal | |
| 31. |
Waves that are required for long distance wireless communication are |
| A. | nfrared rays |
| B. | ltraviolet rays |
| C. | adio waves |
| D. | icrowaves |
| Answer» D. icrowaves | |
| 32. |
If a carrier wave of 1000 kHz is used to carry the signal, the length of transmitting antenna will be equal to ________. |
| A. | 00 m |
| B. | 0 m |
| C. | m |
| D. | .3 m |
| Answer» B. 0 m | |
| 33. |
The layer of atmosphere used for radio-wave transmission is |
| A. | hromosphere |
| B. | roposphere |
| C. | onosphere |
| D. | tratosphere |
| Answer» D. tratosphere | |
| 34. |
The sharpness of a television image is termed as its |
| A. | larity |
| B. | olour |
| C. | esolution |
| D. | raphics |
| Answer» D. raphics | |
| 35. |
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located? |
| A. | tratosphere |
| B. | onosphere |
| C. | roposphere |
| D. | esosphere |
| Answer» C. roposphere | |
| 36. |
Which among the following waves is used for communication by artificial satellites ? |
| A. | icro waves |
| B. | adio waves |
| C. | . M. |
| D. | requency of 1016 series |
| Answer» B. adio waves | |
| 37. |
The frequency of ultrasound wave is typically |
| A. | bove 20 kHz |
| B. | bove 20,000 kHz |
| C. | elow 20 kHz |
| D. | elow 02 kHz |
| Answer» D. elow 02 kHz | |
| 38. |
Why are we able to hear short wave broadcasts better than long wave broadcasts ? |
| A. | hort waves are more energetic than long waves. |
| B. | hort waves are unaffected by atmospheric disturbances. |
| C. | hort wave broadcasts are made by nearby radio stations. |
| D. | y convention, short waves are meant for long distances, whereas long waves are reserved for short distances. |
| Answer» B. hort waves are unaffected by atmospheric disturbances. | |
| 39. |
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is |
| A. | cm |
| B. | cm |
| C. | 2 cm |
| D. | 4 cm |
| Answer» E. | |
| 40. |
Sending a frame to a group of stations is known as |
| A. | ingle casting |
| B. | preading |
| C. | ulticasting |
| D. | asting |
| Answer» D. asting | |
| 41. |
Which of the following is the unit of Astronomical Distance ? |
| A. | etre/sec |
| B. | ec |
| C. | ara/sec |
| D. | arsec |
| Answer» E. | |
| 42. |
Which of the following are used for accurately measuring very small time intervals ? |
| A. | ulsars |
| B. | uartz clocks |
| C. | tomic clocks |
| D. | hite dwarfs |
| Answer» D. hite dwarfs | |
| 43. |
Red light has a wavelength of 70 A°. In "nm" it is |
| A. | nm |
| B. | .07 nm |
| C. | 0 nm |
| D. | 00 nm |
| Answer» E. | |
| 44. |
Pycnometer is an instrument used to measure the |
| A. | ensity |
| B. | ntensity of solar radiation |
| C. | ntensity of earthquake |
| D. | igh temperatures |
| Answer» B. ntensity of solar radiation | |
| 45. |
Which of the following have the same unit ? |
| A. | ork and power |
| B. | orque and moment of inertia |
| C. | ork and torque |
| D. | orque and angular momentum |
| Answer» D. orque and angular momentum | |
| 46. |
'Farad' is the unit of : |
| A. | apacitance |
| B. | nductance |
| C. | esistance |
| D. | onductance |
| Answer» B. nductance | |
| 47. |
A micron is equal to |
| A. | .1 mm |
| B. | .01 mm |
| C. | .001 mm |
| D. | .0001 mm |
| Answer» D. .0001 mm | |
| 48. |
1 Micron is equal to |
| A. | 0–9 m |
| B. | 0–12 m |
| C. | 0–6 m |
| D. | 0–15 m |
| Answer» D. 0–15 m | |
| 49. |
Who gave black hole theory? |
| A. | lbert Einstein |
| B. | tephen Hawking |
| C. | saac Newton |
| D. | one of the above |
| Answer» C. saac Newton | |
| 50. |
Who among the following is credited for the discovery of ''Expanding Universe"? |
| A. | dwin Hubble |
| B. | iels Bohr |
| C. | Chandra Shekhar |
| D. | .V Raman |
| Answer» B. iels Bohr | |