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. |
The atmospheric layer reflecting radio waves is called |
| A. | zonosphere |
| B. | onosphere |
| C. | tratosphere |
| D. | esosphere |
| Answer» C. tratosphere | |
| 2. |
Which of the following characteristics of light remains unchanged when light travels from vaccum enters water? |
| A. | peed |
| B. | mplitude |
| C. | requency |
| D. | avelength |
| Answer» D. avelength | |
| 3. |
A microscope used in pathological laboratories forms |
| A. | agnified, virtual, erect image |
| B. | iminished, real and erect image |
| C. | agnified, virtual and inverted image |
| D. | iminished, virtual and erect image |
| Answer» D. iminished, virtual and erect image | |
| 4. |
Magnifying Glass is basically a |
| A. | lano-concave lens |
| B. | oncave lens |
| C. | onvex lens |
| D. | ylindrical lens |
| Answer» D. ylindrical lens | |
| 5. |
A colour-blind person cannot |
| A. | ee distant objects |
| B. | ee black colour |
| C. | istinguish between certain colours |
| D. | ave persistence of vision |
| Answer» D. ave persistence of vision | |
| 6. |
Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre? |
| A. | 3.75 diopters |
| B. | 11.25 diopters |
| C. | .75 diopters |
| D. | 1.25 diopters |
| Answer» E. | |
| 7. |
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre? |
| A. | 4.33 diopters |
| B. | 2.33 diopters |
| C. | 12.33 diopters |
| D. | .33 diopters |
| Answer» C. 12.33 diopters | |
| 8. |
The light rays used for eliminating bacteria is |
| A. | -rays |
| B. | nfrared rays |
| C. | icrowave radiation |
| D. | ltra-violet radiation |
| Answer» E. | |
| 9. |
The magnifying power of an astronomical telescope can be decreased by |
| A. | ecreasing the focal length of the eyepiece |
| B. | ncreasing the focal length of the eyepiece |
| C. | ncreasing the focal length of the objective |
| D. | one of these |
| Answer» C. ncreasing the focal length of the objective | |
| 10. |
An electron microscope gives higher magnification than an optical microscope, because : |
| A. | t uses more powerful lenses |
| B. | he velocity of electron is smaller than that of visible light |
| C. | he electrons have more energy than the light particles |
| D. | he wavelength of electrons is smaller as compared to the wavelength of visible light |
| Answer» E. | |
| 11. |
The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is |
| A. | iffraction |
| B. | nterference |
| C. | ispersion |
| D. | eflection |
| Answer» D. eflection | |
| 12. |
Which one of the following wavelengths of light is most effective in photosynthesis ? |
| A. | lue |
| B. | reen |
| C. | range |
| D. | ellow |
| Answer» B. reen | |
| 13. |
Energy is continuously created in the sun due to: |
| A. | uclear fusion |
| B. | uclear fission |
| C. | adioactivity |
| D. | rtificial radioactivity |
| Answer» B. uclear fission | |
| 14. |
Which type of reaction produces the most harmful radiation ? |
| A. | usion reaction |
| B. | ission reaction |
| C. | hemical reaction |
| D. | hoto-Chemical reaction |
| Answer» C. hemical reaction | |
| 15. |
What is the range of Strong Nuclear force? |
| A. | nfinite |
| B. | ery short Subnuclear size |
| C. | ery short Nuclear size |
| D. | one |
| Answer» D. one | |
| 16. |
Radioactivity is due to |
| A. | nstable nucleus |
| B. | table nucleus |
| C. | table electronic configuration |
| D. | table electronic configuration |
| Answer» B. table nucleus | |
| 17. |
The damage of the human body due to radiation (X-rays or gamma rays etc) is measured in : |
| A. | ems |
| B. | oentgen |
| C. | urie |
| D. | ads |
| Answer» B. oentgen | |
| 18. |
An atom bomb based upon the principle of ________ |
| A. | uclear fission |
| B. | uclear fussion |
| C. | ontrolled chain reaction |
| D. | one of these |
| Answer» B. uclear fussion | |
| 19. |
Which, of the following radiations has the least wavelength ? |
| A. | -rays |
| B. | -rays |
| C. | -rays |
| D. | -rays |
| Answer» D. -rays | |
| 20. |
The energy obtained from atoms is known as ________ |
| A. | olar energy |
| B. | eat energy |
| C. | uclear energy |
| D. | hemical energy |
| Answer» D. hemical energy | |
| 21. |
A radioactive substance does not undergo any change (in mass or charge) during |
| A. | amma-emission |
| B. | xidation |
| C. | lpha-emission |
| D. | eta-emission |
| Answer» B. xidation | |
| 22. |
Who among the following developed the technology of underground nuclear explosion ? |
| A. | r. Homi J. Bhabha |
| B. | r. Vikram Sarabhai |
| C. | r. Raja Ramanna |
| D. | r. P. K. Iyengar |
| Answer» B. r. Vikram Sarabhai | |
| 23. |
Gamma rays are emissions that have |
| A. | harge but no mass |
| B. | either mass nor charge |
| C. | oth mass and charge |
| D. | ass but no charge |
| Answer» C. oth mass and charge | |
| 24. |
Instrument for measuring blueness of the sky or ocean is called ________ |
| A. | athymeter |
| B. | eraunograph |
| C. | yanometer |
| D. | arometer |
| Answer» D. arometer | |
| 25. |
Which one of the following is used for sun glasses ? |
| A. | yrex glass |
| B. | lint glass |
| C. | rooks glass |
| D. | rystal glass |
| Answer» D. rystal glass | |
| 26. |
What is a compound microscope? |
| A. | microscope that has one lens. |
| B. | microscope that has two sets of lenses : an occular lens and an eyepiece. |
| C. | microscope whose lenses are concave. |
| D. | microscope whose lenses are convex. |
| Answer» C. microscope whose lenses are concave. | |
| 27. |
The sky appears blue due to |
| A. | ayleigh scattering |
| B. | ie scattering |
| C. | ack scattering |
| D. | one of the above |
| Answer» B. ie scattering | |
| 28. |
The redness in atmosphere at Sunrise and Sunset is due to : |
| A. | efraction of light |
| B. | eflection of light |
| C. | ispersion of light |
| D. | cattering of light |
| Answer» E. | |
| 29. |
What is colour of light related to ? |
| A. | mplitude |
| B. | requency |
| C. | uality |
| D. | elocity |
| Answer» B. requency | |
| 30. |
Fibre optics work on the principle of |
| A. | cattering of light |
| B. | otal internal absorption |
| C. | otal internal reflection |
| D. | ptical rotation |
| Answer» D. ptical rotation | |
| 31. |
Parabolic mirrors are used in |
| A. | ar headlights |
| B. | riving mirrors |
| C. | entists mirros |
| D. | having mirros |
| Answer» B. riving mirrors | |
| 32. |
Purpose of an optical filter is to |
| A. | eflect lights of different colours |
| B. | ispense light into component colours |
| C. | efract light of different colours |
| D. | ransmit or absorb light of different colours |
| Answer» E. | |
| 33. |
Optic fibres are used in : |
| A. | AT scans |
| B. | -ray photos |
| C. | ltrasound scans |
| D. | ndoscopy |
| Answer» E. | |
| 34. |
Rainbow is seen after rain because of hanging molecules of water which act as |
| A. | enses |
| B. | irrors |
| C. | risms |
| D. | labs |
| Answer» C. risms | |
| 35. |
The illuminating powers of two sources are compared by |
| A. | spectrometer |
| B. | photometer |
| C. | polarimeter |
| D. | fluxmeter |
| Answer» C. polarimeter | |
| 36. |
The final image in a simple microscope is |
| A. | eal, diminished and inverted |
| B. | eal, magnified and erect |
| C. | irtual, magnified and erect |
| D. | irtual, diminished and erect |
| Answer» D. irtual, diminished and erect | |
| 37. |
Fiber optics cable used in communication, works on the principle of |
| A. | egular reflection of light |
| B. | iffuse reflection of light |
| C. | efraction of light |
| D. | otal internal reflection of light |
| Answer» E. | |
| 38. |
Person who is colourblind cannot distinguish between |
| A. | lack and yellow |
| B. | ed and green |
| C. | ellow and white |
| D. | reen and blue |
| Answer» C. ellow and white | |
| 39. |
A simple microscope consists of : |
| A. | short focus convex lens |
| B. | long focus convex lens |
| C. | short focus concave lens |
| D. | long focus concave lens |
| Answer» B. long focus convex lens | |
| 40. |
Which of the following branch of Physics deal with study of Atomic Nuclei? |
| A. | uclear Physics |
| B. | io Physics |
| C. | tomic Physics |
| D. | one of the above |
| Answer» B. io Physics | |
| 41. |
Which one of the following ray has minimum wavelength? |
| A. | amma ray |
| B. | osmic ray |
| C. | traviolet ray |
| D. | -rays |
| Answer» B. osmic ray | |
| 42. |
In beta decay what is emitted? |
| A. | lectron |
| B. | roton |
| C. | eutron |
| D. | ll of the above |
| Answer» B. roton | |
| 43. |
The nature of fuse wire is |
| A. | igh resistance and low melting point. |
| B. | igh resistance and high melting point. |
| C. | ow resistance and high melting point. |
| D. | ow resistance and low melting point. |
| Answer» B. igh resistance and high melting point. | |
| 44. |
The fuse in our domestic electric circuit melts when there is a high rise in |
| A. | nductance |
| B. | urrent |
| C. | esistance |
| D. | apacitance |
| Answer» C. esistance | |
| 45. |
A bird sitting on a high tension electric wire does not get electrocuted because |
| A. | t has high resistance |
| B. | he body is earthed |
| C. | t does not form a closed path for the flow of current |
| D. | ts feet are good insulators |
| Answer» D. ts feet are good insulators | |
| 46. |
Which of the following is a conductor of electricity ? |
| A. | ubber |
| B. | ure water |
| C. | alt water |
| D. | enzene |
| Answer» D. enzene | |
| 47. |
The metal whose electrical conductivity is more, is |
| A. | opper |
| B. | luminium |
| C. | ilver |
| D. | ead |
| Answer» D. ead | |
| 48. |
Lightning is caused due to |
| A. | lectric power |
| B. | lectric discharge |
| C. | lectric leak |
| D. | lectric pressure |
| Answer» C. lectric leak | |
| 49. |
The earth-wire of a cable is connected to |
| A. | he outer metallic body of the appliance |
| B. | he fuse of the appliance |
| C. | he filament of the appliance |
| D. | hort circuitry of the appliance |
| Answer» C. he filament of the appliance | |
| 50. |
Copper wires are generally used for electrical power transmission instead of iron wire because : |
| A. | opper is cheaper than iron |
| B. | opper is lighter than iron |
| C. | opper is a better conductor of electricity than iron |
| D. | opper can take higher power than iron |
| Answer» D. opper can take higher power than iron | |