MCQOPTIONS
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MCQOPTIONS
This section includes 73 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Isotopes of an element contain |
| A. | the same number of protons but different number of neutrons |
| B. | the same number of neutrons but different number of protons |
| C. | equal number of protons and electrons |
| D. | equal number of nucleons |
| Answer» B. the same number of neutrons but different number of protons | |
| 2. |
Solar eclipse will take place when |
| A. | the sun is between the moon and the earth |
| B. | the earth is between the moon and the sun |
| C. | the moon is between the sun and the earth |
| D. | the moon does not lie on the line joining the sun and the earth |
| Answer» D. the moon does not lie on the line joining the sun and the earth | |
| 3. |
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation? |
| A. | Scattering |
| B. | Diffraction |
| C. | Interference |
| D. | Polarization |
| Answer» B. Diffraction | |
| 4. |
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit |
| A. | X-rays |
| B. | ultraviolet light |
| C. | visible light |
| D. | radio waves |
| Answer» D. radio waves | |
| 5. |
Stars which appear single to the naked eye but are double when seen through a telescope are |
| A. | novas and supernovas |
| B. | binaries |
| C. | asteroids |
| D. | quasars |
| Answer» C. asteroids | |
| 6. |
ML2T-2 is the dimensional formula for |
| A. | moment of inertia |
| B. | pressure |
| C. | elasticity |
| D. | couple acting on a body |
| Answer» E. | |
| 7. |
Rainbow is due to |
| A. | absorption of sunlight in minute water droplets |
| B. | diffusion of sunlight through water droplets |
| C. | ionisation of water deposits |
| D. | refraction and reflection of sunlight by water droplets |
| Answer» E. | |
| 8. |
Inside an aeroplane, flying at a high altitude, |
| A. | the pressure is the same as that outside |
| B. | normal atmospheric pressure is maintained by the use of air pumps |
| C. | the pressure inside is less than the pressure outside |
| D. | normal humidity and partial vacuum are maintained |
| Answer» C. the pressure inside is less than the pressure outside | |
| 9. |
Sound travels with a different speed in media. In what order does the velocity of sound increase in these media? |
| A. | Water, iron and air |
| B. | Iron, air and water |
| C. | Air, water and iron |
| D. | Iron, water and air |
| Answer» D. Iron, water and air | |
| 10. |
Out of the following pairs, which one does not have identical dimension? |
| A. | Moment of inertia and moment of a force |
| B. | Work and Torque |
| C. | Angular momentum and Planck's constant |
| D. | Impulse and Momentum |
| Answer» B. Work and Torque | |
| 11. |
Mercury is commonly used as a thermometric fluid rather than water because |
| A. | specific heat of mercury is less than water |
| B. | specific heat of mercury is more than water |
| C. | mercury has greater visibility than water |
| D. | density of mercury is more than the water |
| Answer» D. density of mercury is more than the water | |
| 12. |
Railway tracks are banked on curves |
| A. | necessary centrifugal force may be obtained from the horizontal component weight of the train |
| B. | to avoid frictional force between the tracks and wheels |
| C. | necessary centripetal force may be obtained from the horizontal component of the weight of the train |
| D. | the train may not fly off in the opposite direction |
| Answer» D. the train may not fly off in the opposite direction | |
| 13. |
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because |
| A. | metals have higher thermal capacity than plastics |
| B. | plastics have a lower density than metals |
| C. | metals are good conductor of heat |
| D. | plastics have a higher thermal conductivity than metals |
| Answer» D. plastics have a higher thermal conductivity than metals | |
| 14. |
Optical fibre works on the |
| A. | principle of refraction |
| B. | total internal reflection |
| C. | scattering |
| D. | interference |
| Answer» C. scattering | |
| 15. |
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons? |
| A. | 1.8 km, 0.15 km |
| B. | 2.2 km, 0.20 km |
| C. | 2.8 km, 0.25 km |
| D. | 3.3 km, 0.30 km |
| Answer» E. | |
| 16. |
Intensity of sound at a point is ____ its distance from the source. |
| A. | directly proportional to |
| B. | inversely proportional to |
| C. | directly proportional to square of |
| D. | inversely proportional to square of |
| Answer» E. | |
| 17. |
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open |
| A. | at sea level |
| B. | at the top of Mt. Everest |
| C. | at a place in a valley below sea level |
| D. | in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level |
| Answer» D. in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level | |
| 18. |
Sound travels at the fastest speed in |
| A. | steel |
| B. | water |
| C. | air |
| D. | vacuum |
| Answer» B. water | |
| 19. |
Of the following properties of a wave, the one that is independent of the other is its |
| A. | amplitude |
| B. | velocity |
| C. | wavelength |
| D. | frequency |
| Answer» B. velocity | |
| 20. |
out of the following, which is not emitted by radioactive substance? |
| A. | Electrons |
| B. | Electromagnetic radiations |
| C. | Alpha particles |
| D. | Neutrons |
| Answer» E. | |
| 21. |
Sound waves in air are |
| A. | transverse |
| B. | longitudinal |
| C. | electromagnetic |
| D. | polarised |
| Answer» C. electromagnetic | |
| 22. |
Metals are good conductors of electricity because |
| A. | they contain free electrons |
| B. | the atoms are lightly packed |
| C. | they have high melting point |
| D. | All of the above |
| Answer» B. the atoms are lightly packed | |
| 23. |
Magnetism at the centre of a bar magnet is |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | minimum or maximum |
| Answer» D. minimum or maximum | |
| 24. |
It is more difficult to walk on a sandy road than on a concrete road because |
| A. | sand is soft and concreter is hard |
| B. | the friction between sand and feet is less than that between concrete and feet |
| C. | the friction between sand and feet is more than that between concrete and feet |
| D. | the sand is grainy but concrete is smooth |
| Answer» C. the friction between sand and feet is more than that between concrete and feet | |
| 25. |
Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2 |
| A. | 0.14 m/s |
| B. | 140 m/s |
| C. | 1.4 km/s |
| D. | 14 m/s |
| Answer» E. | |
| 26. |
Moment of inertia is |
| A. | vector |
| B. | scalar |
| C. | phasor |
| D. | tensor |
| Answer» E. | |
| 27. |
If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same |
| A. | velocity |
| B. | momentum |
| C. | acceleration |
| D. | kinetic energy |
| Answer» C. acceleration | |
| 28. |
Pick out the scalar quantity |
| A. | force |
| B. | pressure |
| C. | velocity |
| D. | acceleration |
| Answer» C. velocity | |
| 29. |
Suitable impurities are added to a semiconductor depending on its use. This is done in order to |
| A. | increase its life |
| B. | enable it to withstand higher voltages |
| C. | increase its electrical conductivity |
| D. | increase its electrical resistivity |
| Answer» D. increase its electrical resistivity | |
| 30. |
Stars twinkle because |
| A. | the intensity of light emitted by them changes with time |
| B. | the distance of the stars from the earth changes with time |
| C. | the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time |
| D. | the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere |
| Answer» D. the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere | |
| 31. |
Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension? |
| A. | Pressure and Young's modules |
| B. | Planck's constant and Angular momentum |
| C. | Impulse and moment of force |
| D. | Force and rate of change of linear momentum |
| Answer» D. Force and rate of change of linear momentum | |
| 32. |
Let a thin capillary tube be replaced with another tube of insufficient length then, we find water |
| A. | will overflow |
| B. | will not rise |
| C. | depressed |
| D. | change its meniscus |
| Answer» C. depressed | |
| 33. |
Mirage is due to |
| A. | unequal heating of different parts of the atmosphere |
| B. | magnetic disturbances in the atmosphere |
| C. | depletion of ozone layer in the atmosphere |
| D. | equal heating of different parts of the atmosphere |
| Answer» B. magnetic disturbances in the atmosphere | |
| 34. |
Light from the Sun reaches us in nearly |
| A. | 2 minutes |
| B. | 4 minutes |
| C. | 8 minutes |
| D. | 16 minutes |
| Answer» D. 16 minutes | |
| 35. |
Stars appears to move from east to west because |
| A. | all stars move from east to west |
| B. | the earth rotates from west to east |
| C. | the earth rotates from east to west |
| D. | the background of the stars moves from west to east |
| Answer» C. the earth rotates from east to west | |
| 36. |
Rectifiers are used to convert |
| A. | Direct current to Alternating current |
| B. | Alternating current to Direct current |
| C. | high voltage to low voltage |
| D. | low voltage to high voltage |
| Answer» C. high voltage to low voltage | |
| 37. |
Pa(Pascal) is the unit for |
| A. | thrust |
| B. | pressure |
| C. | frequency |
| D. | conductivity |
| Answer» C. frequency | |
| 38. |
Planets do not twinkle because |
| A. | they emit light of a constant intensity |
| B. | their distance from the earth does not change with time |
| C. | they are very far away from the earth resulting in decrease in intensity of light |
| D. | they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable |
| Answer» E. | |
| 39. |
Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'? |
| A. | Rainbow |
| B. | Earthshine |
| C. | Halo |
| D. | Mirage |
| Answer» E. | |
| 40. |
Light year is a unit of |
| A. | time |
| B. | distance |
| C. | light |
| D. | intensity of light |
| Answer» C. light | |
| 41. |
RADAR is used for |
| A. | locating submerged submarines |
| B. | receiving a signals in a radio receiver |
| C. | locating geostationary satellites |
| D. | detecting and locating the position of objects such as aeroplanes |
| Answer» E. | |
| 42. |
Sound of frequency below 20 Hz is called |
| A. | audio sounds |
| B. | infrasonic |
| C. | ultrasonic |
| D. | supersonics |
| Answer» C. ultrasonic | |
| 43. |
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because |
| A. | mercury is a metal |
| B. | density of mercury is greater than that of water |
| C. | cohesion of mercury is greater than its adhesion with glass |
| D. | cohesion of water is greater than its adhesion with glass |
| Answer» D. cohesion of water is greater than its adhesion with glass | |
| 44. |
On a rainy day, small oil films on water show brilliant colours. This is due to |
| A. | dispersion |
| B. | interference |
| C. | diffraction |
| D. | polarization |
| Answer» C. diffraction | |
| 45. |
Point A is at a lower electrical potential than point B. An electron between them on the line joining them will |
| A. | move towards A |
| B. | move towards B |
| C. | move at right angles to the line joining A and B |
| D. | remain at rest |
| Answer» C. move at right angles to the line joining A and B | |
| 46. |
Materials for rain-proof coats and tents owe their water-proof properties to |
| A. | surface tension |
| B. | viscosity |
| C. | specific gravity |
| D. | elasticity |
| Answer» B. viscosity | |
| 47. |
Radiocarbon dating technique is used to estimate the age of |
| A. | rocks |
| B. | monuments |
| C. | soil |
| D. | fossils |
| Answer» E. | |
| 48. |
Supersonic plane fly with the speed |
| A. | less than the speed of sound |
| B. | of sound |
| C. | greater than the speed of sound |
| D. | of light |
| Answer» D. of light | |
| 49. |
Mach number is used in connection with the speed of |
| A. | sound |
| B. | aircraft |
| C. | spacecraft |
| D. | ships |
| Answer» C. spacecraft | |
| 50. |
Radio telescopes are better than optical telescopes because |
| A. | they can detect faint galaxies which no optical telescope can |
| B. | they can work even in cloudy conditions |
| C. | they can work during the day and night |
| D. | All of the above |
| Answer» E. | |