1000+ General Physics MCQ for IBPS PO [Solved]

1. The source of electric energy in an artificial satellite is
A. mininuclear reactor
B. a dynamo
C. a thermopile
D. solar cells
Answer : D

2. Commonly used safety fuse wire is made of
A. Tin
B. Lead
C. Nickel
D. An alloy of tin and lead
Answer : D

3. A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
A. conduction and convection only
B. conduction and radiation only
C. convection and radiation only
D. conduction, convection and radiation
Answer : D

4. Credit for starting Space Science Research in India goes to
A. HJ Bhabha
B. SS Bhatnagar
C. V Sarabhai
D. CV Raman
Answer : C

5. 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

6. If an object is placed between two parallel plane mirrors, the number of images formed will be
A. 1
B. infinite
C. 0
D. 4
Answer : B

7. Commonly used safety fuse wire is made of
A. Tin
B. Lead
C. Nickel
D. An alloy of tin and lead
Answer : D

8. Nuclear fission process means
A. absorption of a neutron by a nucleus
B. breakup of the nucleus of a heavy atom into two nearly equal halves emitting two or three neutrons and releasing large amounts of nuclear energy in the process
C. the scattering of neutrons
D. formation of heavier nucleus
Answer : B

9. 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

10. Which of the following apparatus is used in the electrolysis of water?
A. Voltmeter
B. Voltameter
C. Ammeter
D. Potentiometer
Answer : B

11. In compact porous soil, the rising of the water is due to
A. capillarity
B. cohesion
C. adhesion
D. viscosity
Answer : A

12. The air inside an electric, bulb is removed to prevent
A. oxidation of the tungsten filament
B. bursting of the bulb
C. loss of light due to absorption
D. keeping the weight of the bulb less
Answer : A

13. Which of the following is fissionable?
A. U-234
B. U-235
C. U-238
D. Both (b) and (c)
Answer : B

14. A man weighing 50 kg floats on water in a lake. His apparent weight is
A. 50 kg
B. 45 kg
C. zero
D. 150 kg
Answer : C

15. 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

16. Choose the scalar quantity from the following physical quantities
A. force
B. velocity
C. acceleration
D. speed
Answer : D

17. Nichrome is used in electric heaters and irons because
A. it resists oxidation when red hot
B. its melting point is high
C. it has got 60 times the resistance of copper
D. All the above
Answer : D

18. Compared to the atomic bomb, the destructive power of a hydrogen bomb is
A. greater
B. less
C. equal
D. can't be determined
Answer : A

19. 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

20. The earth's nearest neighbour in space is
A. the Sun
B. the Moon
C. the Venus
D. the Mars
Answer : B

21. Photo-electric cells convert
A. electrical energy into light energy
B. light energy into electrical energy
C. light energy into heat energy
D. electrical energy into heat energy
Answer : B

22. 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

23. 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

24. 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

25. Air pressure is usually highest when the air is
A. warm and moist
B. cool and dry
C. warm and dry
D. cool and moist
Answer : D

26. The Milky Way is
A. the path of a star which is nearest to the earth
B. a galaxy which includes the sun
C. a star that is nearest to the earth
D. None of these
Answer : B

27. 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

28. What is the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A. 18 km/sec
B. 11.2 km/ sec
C. 21 km/ sec
D. 35 km/ sec
Answer : B

29. 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

30. Powder clings to the skin because of
A. cohesion
B. adhesion
C. capillary action
D. absorption
Answer : B

31. What la the minimum velocity required for a rocket to overcome earth's gravity and travel into space?
A. 18 km/sec
B. 11.2 km/ sec
C. 21 km/ sec
D. 35 km/ sec
Answer : B

32. During thunder storm you are travelling in a car. To protect yourself from the lightning you will have to
A. remain in the car
B. get out of the car and lie flat in the ground
C. abandon the car and take shelter under a nearby tree
D. touch the nearest electric pole
Answer : A

33. 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

34. The ozone layer absorbs
A. Cosmic rays
B. Infrared rays
C. All radiations of light
D. Ultra violet rays coming from the sun
Answer : D

35. 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

36. X-rays are
A. deflected by electric field
B. deflected by magnetic field
C. slightly deflected by electric field and magnetic field
D. not deflected by electric and magnetic fields
Answer : D

37. Out of the following, name the fluorescent substance.
A. quinine sulphate solution
B. paraffin oil
C. fluorescein solutions
D. All the above
Answer : D

38. The earth's nearest neighbour in space is
A. the Sun
B. the Moon
C. the Venus
D. the Mars
Answer : B

39. 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

40. 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

41. When a body is partly or wholly immersed in a liquid the apparent loss of weight is equal to the weight of the liquid displaced by the submerged portion. This is known as
A. Pascal's law
B. Bernoulli's law
C. Archimedes' law
D. Boyle's law
Answer : C

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

43. Which part of the eye photographic camera?
A. Lens
B. Iris
C. Retina
D. Eyelid
Answer : D

44. When an electric apparatus is fitted with a three core flexible lead the insulation on the three wires is distinctively coloured. The present international convention is
A. brown for earth, yellow for live, light blue for neutral
B. green for earth, yellow for live, brown for neutral
C. yellow for earth, green for live, brown for neutral
D. brown or red for live, light blue or black for neutral and green or yellow for earth
Answer : D

45. Who first established the fact that the earth revolves round the sun?
A. Sir Isaac Newton
B. Kepler
C. Copernicus
D. Ptolemy
Answer : C

46. To produce beats it is necessary to have two waves
A. travelling in opposite direction
B. of slightly different frequencies
C. of equal wavelength
D. of equal amplitude
Answer : B

47. A body has fallen from a height. Just before touching the pound it has
A. lost all its potential energy and gained an equivalent amount of kinetic energy
B. gained potential energy and lost kinetic energy
C. gained kinetic energy as well as potential energy
D. lost kinetic energy as well as potential energy
Answer : A

48. 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

49. Photoelectric cell is a device which converts
A. light energy into electrical energy
B. electrical energy into light energy
C. magnetic energy into electrical energy
D. electrical energy into mechanical energy
Answer : A

50. Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
A. increases to a great extent
B. increases slightly
C. decreases slightly
D. decreases rapidly
Answer : C