MCQOPTIONS
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MCQOPTIONS
This section includes 168 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Transformer is a device to convert |
| A. | D.C. to A.C. |
| B. | Low voltage D.C. into high voltage D.C. |
| C. | Low voltage A.C. into high voltage A.C. |
| D. | Mechanical energy into Electrical energy |
| Answer» D. Mechanical energy into Electrical energy | |
| 2. |
The unit of Planck s constant is |
| A. | Js |
| B. | Js |
| C. | J/s |
| D. | Js |
| Answer» B. Js | |
| 3. |
Unit of resistance is : |
| A. | volt |
| B. | ampere |
| C. | volt/ampere |
| D. | ampere/volt |
| E. | volt ampere |
| Answer» D. ampere/volt | |
| 4. |
Alcohol is more volatile than water because _________ is lower than water. |
| A. | its boiling point |
| B. | its density |
| C. | its viscosity |
| D. | its surface tension |
| Answer» B. its density | |
| 5. |
The dimensional formula ML 1T 2 corresponds to |
| A. | Modulus of elasticity |
| B. | Viscosity |
| C. | Moment of a force |
| D. | Thrust |
| Answer» B. Viscosity | |
| 6. |
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball doesnot rebound. It can be concluded that |
| A. | The rubber ball suffers greater change in momentum |
| B. | The metal ball suffers greater change in momentum |
| C. | Both suffer the same change in momentum |
| D. | The initial momentum of the rubber ball is greater than that of the metal ball |
| Answer» B. The metal ball suffers greater change in momentum | |
| 7. |
Persons suffering from myopia are advised to use |
| A. | convex lens |
| B. | concave lens |
| C. | plano-convex lens |
| D. | plano-concave lens |
| Answer» C. plano-convex lens | |
| 8. |
Speed of sound in air is unaffected by change in :PressureHumidityTemperatureVolumeSpeed of sound in air is unaffected by change in : |
| A. | Pressure |
| B. | Humidity |
| C. | Temperature |
| D. | Volume |
| Answer» B. Humidity | |
| 9. |
For a person having hypermetropia, the near point is |
| A. | greater than 25 cm |
| B. | greater than 50 cm |
| C. | less than 25 cm |
| D. | infinity |
| Answer» B. greater than 50 cm | |
| 10. |
Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be |
| A. | at a higher level in water |
| B. | at a higher level in alcohol |
| C. | at the same level in both |
| D. | floating in alcohol and sinking in water |
| Answer» B. at a higher level in alcohol | |
| 11. |
After reflection from a plane mirror the word will look like.AMBULANCEECNALUBMAAMBULA CEAWBULANCEAfter reflection from a plane mirror the word will look like. |
| A. | AMBULANCE |
| B. | ECNALUBMA |
| C. | AMBULA CE |
| D. | AWBULANCE |
| Answer» D. AWBULANCE | |
| 12. |
A soap bubble shows colours when illuminated with white light. This is due to |
| A. | Diffraction |
| B. | Polarisation |
| C. | Interference |
| D. | Reflection |
| Answer» D. Reflection | |
| 13. |
If input frequency of a full waverectifier be n, then output frequency would be |
| A. | n |
| B. | 2n |
| Answer» E. | |
| 14. |
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in oppositedirection with a speed of 20 mm/s. The distance in mm between adjacent nodes is : |
| A. | 1.0 |
| B. | 1.2 |
| C. | 1.5 |
| D. | 2.0 |
| Answer» B. 1.2 | |
| 15. |
A circular plate, a cube and a sphere, all made up of same material and having the samemass, are heated to 300 C and left in a room. Which of them will have the slowest rate ofcooling? |
| A. | Circular plate |
| B. | Cube |
| C. | Sphere |
| D. | All will cool at the same rate |
| Answer» D. All will cool at the same rate | |
| 16. |
For which one of the following, Diodes are generally used for? |
| A. | Rectification |
| B. | Amplification |
| C. | Modulation |
| D. | Filtration |
| Answer» B. Amplification | |
| 17. |
Stress can be defined as _____ quantity. |
| A. | Scalar |
| B. | Vector |
| C. | Phasor |
| D. | Tensor |
| Answer» E. | |
| 18. |
In the absence of the earth s atmosphere, sky would appear |
| A. | blue |
| B. | deep red |
| C. | white |
| D. | black |
| Answer» E. | |
| 19. |
The least distance of distinct vision is |
| A. | 35 cm |
| B. | 25 cm |
| C. | 45 cm |
| D. | 15 cm |
| Answer» C. 45 cm | |
| 20. |
If electric resistance is to be decreased, then the number of resistances should be connected in _______ |
| A. | Series |
| B. | Parallel |
| C. | Mixed arrangement |
| D. | None of these |
| Answer» C. Mixed arrangement | |
| 21. |
The spring balance works on the principle of __________ . |
| A. | Boyle s Law |
| B. | Hooke s Law |
| C. | Bernoulli s principle |
| D. | Pascal s Law |
| Answer» C. Bernoulli s principle | |
| 22. |
Flemings Left hand Rule is associated with the effect of |
| A. | Electric field on current |
| B. | Magnetic field on magnet |
| C. | Electric field on magnet |
| D. | Magnetic Field on current |
| Answer» E. | |
| 23. |
For photoelectric effect to take place, the metal used as the cathode should have______ |
| A. | high melting point |
| B. | low melting point |
| C. | low work function |
| D. | low resistance |
| Answer» D. low resistance | |
| 24. |
The frequency of direct current is _______ |
| A. | Zero |
| B. | 50 HZ |
| C. | 60 HZ |
| D. | 100 HZ |
| Answer» B. 50 HZ | |
| 25. |
In hydel power station, the motion produced in turbines is due to |
| A. | flow of water |
| B. | burning of coal |
| C. | burning of diesel |
| D. | production of steam |
| Answer» B. burning of coal | |
| 26. |
Every hot object emits _____ |
| A. | X rays |
| B. | Visible light |
| C. | Infrared rays |
| D. | Ultraviolet rays |
| Answer» D. Ultraviolet rays | |
| 27. |
On a cold day when the room temperature is 15 C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15 C, because : |
| A. | metals have higher thermal capacity than plastics |
| B. | plastics have a lower density than metals |
| C. | metals are good conductors of heat |
| D. | plastics have a higher thermal conductivity than metals |
| Answer» D. plastics have a higher thermal conductivity than metals | |
| 28. |
One nanometer is equal to ______ meters. |
| A. | 10 raised to the power (-3) |
| B. | 10 raised to the power (-6) |
| C. | 10 raised to the power (-9) |
| D. | 10 raised to the power (-12) |
| Answer» D. 10 raised to the power (-12) | |
| 29. |
Which one among the following components can not be developed within an integrated circuit ? |
| A. | Diode |
| B. | Triode |
| C. | Transformer |
| D. | Transistor |
| Answer» D. Transistor | |
| 30. |
During the motion of a projectile fired from the earth surface, _______ |
| A. | its kinetic energy remains constant |
| B. | its momentum remains constant |
| C. | vertical component of its velocity remains constant |
| D. | horizontal component of its velocity remains constant |
| Answer» D. horizontal component of its velocity remains constant | |
| 31. |
A bomb explodes on the moon. You will hear its sound on earth after ______ |
| A. | 20 minutes |
| B. | 2 hours 20 minutes |
| C. | 3.7 hours |
| D. | You cannot hear the sound of explosion |
| Answer» E. | |
| 32. |
The reverse effect of X ray emission is |
| A. | Raman effect |
| B. | Compton effect |
| C. | Zeeman effect |
| D. | Photoelectric |
| Answer» E. | |
| 33. |
The weight of a body at the centre of earth is: |
| A. | half the weight at the surface |
| B. | zero |
| C. | twice the weight at the surface |
| D. | infinite |
| Answer» C. twice the weight at the surface | |
| 34. |
When we see an object, the image formed on the retina is |
| A. | Real and inverted |
| B. | Real and erect |
| C. | Virtual and erect |
| D. | Virtual and inverted |
| Answer» B. Real and erect | |
| 35. |
The temperature of a liquid is 32 F. What is its temperature in Celsius scale? |
| A. | 32 C |
| B. | 0 C |
| C. | 100 C |
| D. | 212 C |
| Answer» C. 100 C | |
| 36. |
Water is used in a hot water bag because |
| A. | It is easily available |
| B. | It has high specific gravity |
| C. | It has high specific heat |
| D. | It is a liquid substance |
| Answer» D. It is a liquid substance | |
| 37. |
The term Higgs Boson is associated with |
| A. | Nano Technology |
| B. | Oncology |
| C. | God Particle |
| D. | Stem Cell Research |
| Answer» D. Stem Cell Research | |
| 38. |
0 K is equivalent to |
| A. | 273 C |
| B. | 273 C |
| C. | 0 C |
| D. | 100 C |
| Answer» C. 0 C | |
| 39. |
Curie is an unit of |
| A. | Radioactivity |
| B. | energy of Gamma rays |
| C. | intensity of Gamma rays |
| D. | work function |
| Answer» B. energy of Gamma rays | |
| 40. |
The Choke used with a tube light is basically |
| A. | an inductor |
| B. | a capacitor |
| C. | a transformer |
| D. | a resistor |
| Answer» B. a capacitor | |
| 41. |
A light year is a unit of: |
| A. | Time |
| B. | Distance in Space |
| C. | Length of astronomical distances |
| D. | Distance travelled by light |
| E. | None of these |
| Answer» F. | |
| 42. |
Alcohol is more volatile than water because _________ is lower than water. |
| A. | its boiling point |
| B. | its density |
| C. | its viscosity |
| D. | its surface tension |
| Answer» B. its density | |
| 43. |
Parsec is the unit measurement of |
| A. | Density of stars |
| B. | Astronomical distance |
| C. | Brightness of heavenly bodies |
| D. | Orbital velocity of giant stars |
| Answer» C. Brightness of heavenly bodies | |
| 44. |
Distant objects are visible as a little out of focus in this condition : |
| A. | presbiopia |
| B. | hypermetropia |
| C. | astigmatism |
| D. | myopia |
| Answer» E. | |
| 45. |
A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes : |
| A. | <table><tr><td rowspan="2"><span style=" text-decoration: overline;"> </span></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>x</center></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">2</td></tr></table> |
| B. | x |
| C. | 2x |
| D. | <table><tr><td rowspan="2"><span style=" text-decoration: overline;"> </span></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>x</center></td><td rowspan="2"></td></tr><tr><td style="text-align: center;">4</td></tr></table> |
| Answer» C. 2x | |
| 46. |
Plank s constant has the dimensions of : |
| A. | energy |
| B. | linear momentum |
| C. | angular momentum |
| D. | force |
| Answer» B. linear momentum | |
| 47. |
A person can jump higher on the moon s surface than on the earth because : |
| A. | the moon s surface is rough |
| B. | the acceleration due to gravity in moon is smaller than that on the earth. |
| C. | the moon is cooler than earth |
| D. | the moon has no atmosphere |
| Answer» C. the moon is cooler than earth | |
| 48. |
Distances of stars are measured in |
| A. | Galactic unit |
| B. | Stellar mile |
| C. | Cosmic kilometre |
| D. | Light year |
| Answer» E. | |
| 49. |
An electron microscope gives higher magnifications than an optical microscope because : |
| A. | The velocity of electrons is smaller than that of light |
| B. | The wavelength of electrons is smaller as compared to the wavelength of visible light |
| C. | The electrons have more energy than the light particulars |
| D. | The electron microscope uses more powerful lenses |
| Answer» C. The electrons have more energy than the light particulars | |
| 50. |
A man in a train moving with a constant velocity drops a ball on the platform. The path of the ball as seen by an observer standing on the platform is |
| A. | A straight line |
| B. | A circle |
| C. | A parabola |
| D. | None of these |
| Answer» D. None of these | |