General Physics MCQ Solved Paper for SSC JHT

1. Warm air will hold more water vapour than cold air because
A. it is lighter
B. it has more water vapour in it
C. its molecules are close together
D. its molecules are far apart
Answer : D

2. A photon is
A. a quantum of electromagnetic radiation
B. light source used in photography
C. a photo film
D. sun-light
Answer : A

3. Who discovered that the Cree Call acceleration Is the same for any object at a given place?
A. Newton
B. Pascal
C. Archimedes
D. Galileo
Answer : D

4. X-rays were discovered by
A. Wilhelm Roentgen
B. WO Coolidge
C. Henry Cavendish
D. William Watson
Answer : A

5. 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

6. When one enters a dark room after being in bright light one is not able to see anything clearly for a while because
A. the retina of the eye moves forward
B. the retina of the eye moves backward
C. c).the iris is unable to dilate the pupil immediately to be able to see things
D. the eye has no power of accommodation
Answer : C

7. An ohm is a unit of
A. potential difference
B. resistance
C. current
D. All the above
Answer : B

8. The sun continuously produces an enormous amount of energy. This is due to
A. nuclear fission
B. nuclear fusion
C. chemical combustion
D. boiling
Answer : B

9. 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

10. Electron-volt is a unit of
A. power
B. velocity
C. energy widely used in nuclear physics
D. number of electrons
Answer : C

11. The Cact that the compass needle does not point true north was observed first by
A. Sir Isaac Newton
B. Columbus
C. Archimedes
D. Thomas Alva Edison
Answer : B

12. In the nucleus of an atom, the uncharged particle is
A. proton
B. neutron
C. electron
D. positron
Answer : B

13. Thick brick walls are used in the construction or a cold storage because bricks
A. are good conductors of heat
B. are cheaper
C. are easily obtained
D. are bad conductors of heat
Answer : D

14. The electrical domestic tube light gives white fiourescent light because of
A. collision between molecules of filled gas under electric current
B. heavy current
C. vacuum inside the tube
D. falling of ultra violet rays on the white inner coating of the tube
Answer : D

15. The number of electrons in the outer orbits of a nucleus gives
A. the mass number
B. atomic number
C. atomic weight
D. absolute number
Answer : B

16. X-rays are used
A. in hospital in the treatment of malignant growth
B. to reveal hidden flaws in metal castings and welded joints
C. to detect alterations made in works of art
D. All the above
Answer : D

17. Gamma radiations are used for
A. sterilising food stuff
B. controlling pests
C. cancer therapy
D. All of these
Answer : D

18. 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

19. Pyrometers are instruments used
A. for measuring the velocity of wind
B. in the manufacture of fireworks
C. in finding the coefficient of apparent expansion of a liquid
D. for measuring high temperatures
Answer : D

20. The world's first artificial satellite Sputnik I was launched by Russia in
A. 1985
B. 1957
C. 1959
D. 1960
Answer : B

21. The speed of sound in a medium depends upon the properties of the medium such as
A. its density
B. its temperature
C. its elasticity
D. All the above
Answer : D

22. The period of oscillation of a simple pendulum depends upon
A. the mass of its bob
B. the material of the bob
C. the amplitude of vibration
D. acceleration due to the gravity at the site of experiment
Answer : D

23. 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

24. An integrated circuit la more advantageous than a conventional circuit because
A. they make the electric equipment more reliable and easier for servicing
B. a faulty part of a conventional circuit may be difficult to locate and repair
C. if a part of the integrated circuit fails the entire circuit is simply replaced
D. All the above
Answer : D

25. SONAR (Sound Navigation Ranging) is
A. used by warships and military aircraft to locate enemy submarines
B. used by ships to determine the depth of water beneath them
C. a detective device that uses sound to locate under - water objects
D. All the above
Answer : D

26. A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps
A. the ball will travel towards the centre of the circle and fall down
B. it will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
C. it will fall down at the same place where the string breaks
D. None of these
Answer : B

27. Primary colours are
A. colours of the rainbow
B. colours in the spectrum of white light
C. colours which cannot be produced by mixing other colours
D. colours found in nature
Answer : C

28. The brightest planet in the Solar System is
A. Jupiter
B. Mercury
C. Venus
D. Sirius
Answer : C

29. Which of the following sets of elementary particles have nearly equal masses?
A. Neutron and Proton
B. Electron and Proton
C. Neutron and Electron
D. Proton, Neutron and Electron
Answer : A

30. Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
A. both walls are silvered on the vacuum side
B. there is vacuum between the double walls
C. the cork is a poor conductor of heat
D. of all the above
Answer : D

31. Which physical quantity is measured in watts
A. power
B. kinetic energy
C. momentum
D. impulse
Answer : A

32. Fish and other aquatic creatures can live inside a deep frozen pond because
A. fish are cold-blooded animals
B. ice is a bad conductor of heat
C. there will always be water just beneath the ice level
D. they can adapt themselves to live in ice
Answer : C

33. 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

34. 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

35. Metals are good conductors of heat because
A. they contain free electrons
B. their atoms are relatively far apart
C. their atoms collide frequently
D. they have reflecting surfaces
Answer : A

36. Out of the following which element has the longest half-life period?
A. Radium
B. Radon
C. Uranium-238
D. Plutonium
Answer : C

37. 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

38. 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

39. When a charged rod is brought near a collection of small pith balls, the balls
A. will jump rapidly up and down for a short time
B. will remain unaffected
C. Both (a) and (b) above
D. It will produce electric shock
Answer : A

40. If a body weight 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?
A. 12N
B. 2N
C. 10N
D. 6N
Answer : B

41. A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and
A. when the moon passes between the sun and the earth
B. when the sun comes between the earth and the moon
C. when the earth comes between the sun and the moon
D. on a full moon day
Answer : A

42. The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by
A. Irene Curie
B. W Bothe and H Becker
C. James Chadwick
D. Jean Joliot
Answer : C

43. In the fuse of an electrical installation blows out
A. replace the fuse by a thin wire
B. replace the fuse by a thick copper wire
C. replace the fuse by a fuse wire of proper rating
D. replace the fuse by nichrome wire
Answer : C

44. The rate of cooling of a hot body depends on
A. the nature of the radiating surface
B. area of the radiating surface
C. temperature difference between the body and the surroundings
D. All the above
Answer : D

45. When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon Is known as
A. doppler effect
B. beats
C. resonance
D. echo
Answer : B

46. A device used in a ship for the purpose of measuring the depth of the sea is
A. an altimeter
B. a fathometer
C. a hydrometer
D. a sonometer
Answer : B

47. A man Jumping out of a moving train is thrown
A. forward
B. backward
C. sideways
D. None of the above
Answer : A

48. When the velocity of a body is halved
A. its momentum is halved
B. its kinetic energy is halved
C. its acceleration is halved
D. its potential energy is halved
Answer : A

49. The radiator in a car serves to
A. cool the engine
B. heat up the engine
C. start the car
D. moderate the speed
Answer : A

50. The property of a fluid by which it resists relative motion within itself is known as
A. cohesive force
B. surface tension
C. diffusion
D. viscosity
Answer : D