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General Physics 1000+ MCQ with answer for XAT

Thursday 9th of March 2023

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1. An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
A. sugar
B. sodium carbonate
C. common salt
D. carbonates of calcium and magnesium
Answer : D
2. If an empty cylinder Is half ruled with a liquid, Its centre of gravity is
A. shifted upwards
B. shifted downwards
C. shifted neither upward nor downward
D. shifted upward or downward depending on the density of the liquid
Answer : B
3. When a ship floats on water, the weight or water displaced is
A. an indeterminate quantity
B. equal to the weight of the ship
C. greater than the weight of the ship
D. less than the weight of the ship
Answer : B
4. The mass number and the atomic number of an element are X and Y respectively. The number oC neutrons in the atom of that element is
A. X
B. Y
C. X + Y
D. X Y
Answer : D
5. Enriched uranium means
A. Uranium that is very pure
B. Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium
C. Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium
D. None of the above
Answer : C
6. The rocket engine is motivated by jet propulsion which uses the famous
A. Kepler's Laws
B. Newtonian Third Law of Motion
C. Bernoulli's Principle
D. Law of Relativity
Answer : B
7. The numerical reading of the Fahrenheit thermometer of a given temperature
A. is proportional to that of the Celsius thermometer
B. is always greater than that of the Celsius thermometer
C. is always less than that of the Celsius thermometer
D. may be greater than or less than or equal to that of the Celsius thermometer
Answer : D
8. An ammeter has
A. a high resistance
B. a very low resistance
C. no resistance at all
D. resistance of 400 � w
Answer : B
9. A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will
A. first rise and then fall
B. fall
C. remain the same
D. rise
Answer : C
10. When an incident beam of light strikes the surface of a glass slab normally, the refracted beam
A. goes straight through without bending
B. gets deviated away from the normal
C. gets bent towards the normal
D. gets reflected
Answer : C
11. Galaxies emit
A. radio waves and X-rays
B. ultraviolet light waves
C. visible light waves
D. All the above
Answer : D
12. The SI unit of electric current is
A. the ampere
B. the volt
C. the ohm
D. the coulomb
Answer : A
13. The minimum velocity required by a satellite to escape earth's gravitational pull is
A. 18 km/s
B. 11.2 km /s
C. 21 km/s
D. 35 km/s
Answer : B
14. The acoustical quality of a room depends on
A. the size and shape of the room
B. the ability of the ceiling, walls and floor to exclude unwanted sound
C. the use of furnishings made of sound absorbing materials
D. All the above
Answer : D
15. An electric charge is measured in
A. coulomb
B. ampere
C. volt
D. watt
Answer : A
16. Formation of shadows can be explained by
A. rectilinear propagation of light
B. reflection
C. refraction
D. total internal reflection
Answer : A
17. Which metal is used in storage batteries?
A. Copper
B. Lead
C. Tin
D. Iron
Answer : B
18. A heavenly body similar in nature to the sun intensely hot glowing mass that produces its energy by thermonuclear reactions is
A. a planet
B. a meteor
C. a star
D. a comet
Answer : C
19. In a river, the currents are fastest where the river la
A. wide and shallow
B. narrow and shallow
C. wide and deep
D. narrow and deep
Answer : B
20. The largest reserve of radioactive element which can be used in a nuclear reactor has been found in India, The name of the element is
A. Thorium
B. Uranium
C. Plutonium
D. Radium
Answer : A
21. When a whistling engine approaches a person standing on the platform, the frequency or the note
A. appears to increase
B. appears to decrease
C. does not change at all
D. first increases then decreases
Answer : A
22. The velocity of sound in air increases with
A. the rise of temperature
B. rise of its frequency
C. decrease in humidity
D. fall of temperature
Answer : A
23. A small bubble of air deep down in a lake rises up to the top of the lake. The volume of the bubble on coming up will
A. increase
B. decrease
C. will not change
D. first increase and then decrease
Answer : A
24. The attraction of unlike molecules at the common surface is known as
A. adhesion
B. cohesion
C. surface tension
D. capillarity
Answer : A
25. Light from the sun reaches the earth in
A. 2 minutes
B. 4 minutes
C. 12 minutes
D. 8 minutes
Answer : D
26. Which of the following is wrongly matched?
A. electric current - ampere
B. resistance - Ohm
C. electric power - volt
D. electric charge Coulomb
Answer : C
27. The Space Application Centre for training in Satellite Communication Technology is located at
A. Bangalore
B. Mumbai
C. Ahmedabad
D. New Delhi
Answer : C
28. While crossing a suspension bridge, the soldiers are ordered to break steps because
A. the marching in steps will involve a big strain on them
B. the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions
C. the marching may obstruct other traffic
D. rumblings of their marching may disturb the surroundings
Answer : B
29. In the visible spectrum which colour has the shortest wavelength?
A. Red
B. Blue
C. Yellow
D. Violet
Answer : D
30. The audible range of a normal human ear is frequencies ranging from
A. 10000 to 20000 Hz
B. 50 to 15000 Hz
C. 20 to 20000 Hz
D. 15 to 50000 Hz
Answer : C
31. The hydraulic jack to lift heavy vehicles in automobile service stations is one of the applications of
A. Pascal's law
B. Principle of Archimedes
C. Boyle's law
D. Hooke's law
Answer : A
32. The loudness of a sound is determined by
A. Frequency
B. Amplitude
C. Speed
D. Wavelength
Answer : B
33. Atoms which have the same atomic number but different mass numbers are called
A. isobars
B. isomers
C. isotones
D. isotopes
Answer : D
34. If you want a sound proof room, the walls should be
A. able to refract the sound
B. good absorbers of sound
C. good reflectors of sound
D. All the above
Answer : B
35. The earth satellite Aryabhatta was put in orbit by India on
A. October 20, 1978
B. November 14, 1978
C. January 26, 1979
D. April 19, 1975
Answer : D
36. Gamma radiations are used for
A. sterilising food stuff
B. controlling pests
C. cancer therapy
D. All of these
Answer : D
37. Sun spots are
A. the mountains found on the surface of the Sun
B. the dark patches on the sun having less temperature than the normal sun's surface
C. ionized gas found near the solar surface
D. the magnetic storms on the surface of the Sun
Answer : B
38. In the electrical circuit of a house the fuse acts as
A. a thermopile
B. a load
C. a step down device
D. a safety device
Answer : D
39. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
A. will increase
B. will decrease
C. does not change
D. varies with the increase of depth of the immersion of the iron piece
Answer : A
40. The unit of heat energy is
A. watt
B. degree
C. joule
D. erg
Answer : C
41. A sensitive instrument susceptible to magnetic infiuence can be protected from external magnetic field by
A. enclosing it in a thick walled iron box
B. wrapping it with an insulator
C. by placing it inside a glass case
D. by surrounding it with fine copper gauze
Answer : A
42. In a concert hall reverberation is controlled by
A. reduction of seating capacity in the hall
B. increase of sound intensity in the hall
C. lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
D. by opening the doors and windows of concert hall
Answer : C
43. The device that is used to measure the electromotive force of a cell is
A. an ammeter
B. a rheostat
C. a voltmeter
D. a voltameter
Answer : C
44. For an electron orbiting in a hydrogen atom, the necessary centripetal force keeping it in orbit is provided by
A. the electrical attraction between the negatively charged electron and the positively charged porton
B. the high speed of the electron
C. the low speed of the electron
D. gravity
Answer : A
45. A thermostat is a device used
A. for automatically maintaining a steady temperature
B. for measuring electricity
C. to reduce the voltage of electricity
D. for producing heat
Answer : A
46. A pair of stars that revolve round each other is
A. a neutron star
B. a binary star
C. a dwarf star
D. a polar star
Answer : B
47. A person does not sink in the Dead Sea because
A. the sea contains a large amount of other salts besides sodium chloride
B. the density of the person is less than the density of the Dead Sea water
C. of the surface tension due to salt water in the Dead Sea
D. of difference in mass
Answer : B
48. Every action has an equal and opposite reaction is Newton's law of Motion
A. first
B. second
C. third
D. fourth
Answer : C
49. The filament lamp is an example for
A. fluorescence
B. incandescence
C. both (a) and (b)
D. None of these
Answer : B
50. A temperature below absolute zero for an ideal gas
A. cannot be attained experimentally
B. can be attained
C. is impossible
D. Does not exist at all
Answer : C
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