SSC JE - General Physics 1000+ MCQ [Solved] PDF Download

1. When a swing la drawn to a side Its potential energy In relation to the earth
A. increases
B. decreases
C. remains the same
D. is constant
Answer : A

2. Mercury is used in a barometer because
A. its density being very high 13.6 g/cm3 the height of mercury column is conveniently small
B. at the ordinary temperature its vapour pressure is small
C. it is opaque and does not wet glass
D. All the above
Answer : D

3. The heat generated in a conductor carrying current is proportional to
A. the resistance
B. the square of the current flowing through it
C. the time the current flows
D. All the above
Answer : D

4. Astigmatism, a structural defect of the eye, is due to
A. the eye lens being thin
B. the eye lens being thick
C. lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
D. the pupil being very small
Answer : C

5. 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

6. The plants in a greenhouse are enclosed in a glass enclosure because
A. glass allows the heat radiations of shorter wavelengths from the sun to pass through
B. the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths
C. the longer wavelengths cannot penetrate through the glass walls
D. All the above
Answer : D

7. A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet will be in
A. a horizontal position
B. a nearly vertical position with its South Pole downwards
C. a nearly vertical position with its North Pole downwards
D. a slanting position
Answer : C

8. The stars that shine brightly then dimly and then brightly are known as
A. meteors
B. binaries
C. variable stars
D. bright stars
Answer : C

9. 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

10. Sound waves in air are
A. transverse
B. longitudinal
C. transverse and longitudinal
D. neither transverse nor longitudinal
Answer : B

11. Bats flying in the dark avoid obstacles because
A. they can see very dearly only in darkness
B. they produce ultrasonic waves which guide them
C. their eyes are sensitive to darkness
D. their eye holes expand in darkness
Answer : B

12. The largest planet in the solar system is
A. Neptune
B. Uranus
C. Jupiter
D. Saturn
Answer : C

13. If a man wants to hear clearly the echo of a sound produced by him from a hill, the hill should be away from him by a minimum distance of
A. 330 m
B. 33 m
C. 16.5 m
D. 165 m
Answer : C

14. Railway tracks are banked on curves so that
A. the necessary centrifugal force may be obtained from the horizontal component of the weight of the train
B. the frictional force between the track and the wheels is avoided
C. the necessary centripetal force may be derived from the horizontal component of the weight of the train
D. None of these
Answer : C

15. The resistance of a wire depends on
A. the material of the wire
B. the length of the wire
C. the cross section of the wire
D. All the above
Answer : D

16. Why is nuclear fusion also known as thermonuclear reaction?
A. Fusion converts nuclear energy into heat
B. Fusion demands conditions of extremely high temperature to produce it
C. Fusion produces large amount of heat
D. Fusion reactions takes place in the sun
Answer : B

17. Railway tracks are banked on curves so that
A. the necessary centrifugal force may be obtained from the horizontal component of the weight of the train
B. the frictional force between the track and the wheels is avoided
C. the necessary centripetal force may be derived from the horizontal component of the weight of the train
D. None of these
Answer : C

18. Heat transfer
A. cools the body that transfers it
B. heats the body that absorbs the heat
C. may change the physical state of the substance
D. All the above
Answer : D

19. 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

20. When sound waves travel from one medium to another, the quantity which remains unchanged is its
A. speed
B. frequency
C. wavelength
D. All the above
Answer : B

21. The temperature of a large bucket-full of hot water (a few degrees below boiling point) is lower than a beaker full of boiling water. But
A. the hot water contains a much larger quantity of internal energy than the boiling water
B. the boiling water contains more quantity of internal energy than the warm water
C. both of them have got the same amount of internal energy.
D. nothing can be said definitely with the data given
Answer : A

22. 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

23. 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

24. A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
A. increase
B. decrease
C. remain unaffected
D. have its shape changed
Answer : A

25. Before the invention of geostationary satellites, television stations could not transmit their programmes to far off places because
A. these signals are electromagnetic in nature
B. these are not electromagnetic in nature
C. their wavelength is very large
D. they are not reflected by the ionosphere but pass through it
Answer : D

26. The presence of impurities
A. lowers the melting point of ice
B. raises the melting point of ice
C. has no effect on the melting point of ice
D. may lower or raise the melting point depending upon the type of impurities
Answer : A

27. Which of the following pairs is not correct?
A. Television - Baird
B. Transistor ~ Shockley
C. Thermometer - Celsius
D. Barometer Torricelli
Answer : C

28. 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

29. The rings of Saturn were discovered by
A. Galileo
B. Bhaskara
C. Aryabhatta
D. Ptolemy
Answer : A

30. The characteristics of a musical note are
A. loudness
B. pitch
C. quality or timbre
D. All the above
Answer : D

31. Dioptre is the unit of power of
A. convex mirrors
B. concave mirrors
C. concave lenses
D. lenses irrespective of types
Answer : D

32. The image of an object formed in a plane mirror
A. is real
B. is virtual
C. can be obtained on a screen
D. is slightly bigger than the object
Answer : B

33. 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

34. 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

35. 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

36. Of the following types of electromagnetic radiation which has the longest wavelength?
A. ultraviolet rays
B. gamma rays
C. radio waves
D. infrared waves
Answer : C

37. It is more difficult to walk on ice than on a concrete road because
A. there is very little friction between the ice and feet pressing it
B. ice is soft when compared to concrete
C. there is more friction between the ice and feet
D. None of the above
Answer : A

38. When light travels from one medium to another there is a change in its
A. velocity
B. wavelength
C. frequency
D. Both (a) and (b) above
Answer : D

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

40. Mercury is used in thermometers because
A. it has high thermal conductivity
B. it has uniform expansivity
C. it has high boiling point and low freezing point
D. of all the above
Answer : D

41. Among the following the most suitable material for the core of an electro-magnet is
A. steel
B. wood
C. soft iron
D. copper
Answer : C

42. Echoes are produced by
A. the reflection of sound waves
B. the refraction of sound waves
C. the interference of sound waves
D. reverberation of sound waves
Answer : A

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

44. The best estimates of the age of the earth comes from the studies of
A. angle of inclination of the earth
B. changes in radio-active minerals in it
C. period taken by Sun's light to reach the earth
D. artificial satellites revolving round the earth
Answer : B

45. A simple mercury barometer is found in a slightly slanting position. The atmospheric pressure
A. is found by measuring the slanting height of the mercury column
B. is given by the vertical height
C. cannot be measured with it
D. u) can be measured by both the methods described above
Answer : B

46. 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

47. The force that keeps a body in a circular motion is called
A. the centripetal force
B. the centrifugal force
C. the frictional force
D. All the above
Answer : A

48. 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

49. The image formed by a plane mirror is
A. of the same size as the object
B. at the same distance behind the mirror as the object is in front of it
C. virtual and laterally inverted
D. All the above
Answer : D

50. Where does the centre of gravity of a rubber ring lie?
A. on the outer surface
B. in the inner surface
C. at the centre of the ring
D. None of the above
Answer : C