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45 Important Questions Quiz for Physics Students : Provided below is the set of GK questions and answers on Physics. This set of Physics GK questions and answers is prepared based on ongoing exam pattern of various competitive examinations and for sure will help you score outstanding in the exam.
No.-1. Ampere-hour is the unit of which among the following?
- a) Power,
- b) Energy,
- c) Intensity of current,
- d) Amount of charge
Answer : d) Amount of charge
No.-2. Which among the following quantities is scalar?
- a) Velocity,
- b) Acceleration,
- c) Work,
- d) Force
Answer : a) Velocity,
No.-3. Nichrome wire is used in an electric heater because _ ?
- a) It has high resistance,
- b) It has high melting point,
- c) It can resist a current upto approx 5 amperes,
- d) For all of the above reasons
Answer : d) For all of the above reasons
No.-4. A moving electric charge produces _ ?
- a) Only electric field,
- b) Only Magnetic field,
- c) Both electric and magnetic field,
- d) Either electric or a magnetic field
Answer : c) Both electric and magnetic field,
No.-5. One mega watt hour (MWH) is equal to?
- a) 3.6 × 103 joule,
- b) 3.6 × 104 joule,
- c) 3.6 × 107 joule,
- d) 3.6 × 109 joule
Answer : d) 3.6 × 109 joule
No.-6. At what temperature are the temperature on Celsius and Fahrenheit scales equal?
- a) 273 degree Celsius,
- b) -273 degree Celsius,
- c) -40 degree Celsius,
- d) 40 degree Celsius
Answer : c) -40 degree Celsius,
No.-7. With an increase in pressure the melting point of max will?
- a) Decrease,
- b) Increase,
- c) First increase and then decrease,
- d) Remain Unaffected
Answer : b) Increase,
No.-8. Which among the following is the best conductor of electricity?
- a) Silver,
- b) Copper,
- c) Gold,
- d) Lead
Answer : a) Silver,
No.-9. Which among the following order of decreasing wavelengths of electromagnetic waves is correct?
- Radio waves, II. Infrared rays, III. Visible Light, IV. X-Rays.
- a) II, I, IV, III
- b) I, III, II, IV
- c) I, II, III, IV
- d) IV, III, II, I
Answer : c) I, II, III, IV
No.-10. Gas law was given by?
- a) Boyle,
- b) Ostwald,
- c) Arrhenius,
- d) Faraday
Answer : a) Boyle,
No.-11. Kilowatt – hour is a unit of?
- a) Energy,
- b) Power,
- c) Electric charge,
- d) Current
Answer : b) Power
No.-12. Who discovered X-Rays?
- a) Madam Curie,
- b) Einstein,
- c) Roentgen,
- d) J. J. Thomson
Answer : c) Roentgen,
No.-13. Which among the following are primary colors?
- a) Red, Green, Blue
- b) Blue, Yellow, Green
- c) Red, Magenta, Yellow
- d) Yellow, Violet, Blue
Answer : a) Red, Green, Blue
No.-14. Light from the laser is _ ?
- a) Monochromatic,
- b) Composite,
- c) Dispersed light,
- d) Incoherent
Answer : a) Monochromatic,
No.-15. Choke is used to_ ?
- a) Reduce the current in AC circuit,
- b) Reduce the current in DC circuit,
- c) Convert AC to DC,
- d) Convert DC to AC
Answer : a) Reduce the current in AC circuit,
No.-16. In a standing wave the distance between a node and adjacent antinode is _ ?
- a) 3λ / 2,
- b) λ / 2,
- c) λ / 4,
- d) 3λ / 4
Answer : c) λ / 4,
No.-17. A telescope and microscope differ in that _ ?
- a) Both are different instruments,
- b) Telescope’s eyepiece with longer focal lengths that the oblective,
- c) Telescope has objective of large focal length and eyepiece of smaller focal lengths,
- d) None of these
Answer : c) Telescope has objective of large focal length and eyepiece of smaller focal lengths,
No.-18. Only one part of moon can be seen from earth because _ ?
- a) Only one part reflects light,
- b) It does not rotate,
- c) The period of rotation and revolution are equal,
- d) None of these
Answer : c) The period of rotation and revolution are equal,
No.-19. Parsec is a unit of _ ?
- a) Pressure,
- b) Astronomical distance,
- c) Time,
- d) Energy
Answer : b) Astronomical distance,
No.-20. In which among the following is alternating current not used?
- a) Refrigeration,
- b) Heat production,
- c) Electroplating,
- d) Radio detection
Answer : c) Electroplating,
No.-21. Blisters are formed more rapidly by the steam of boiling water in comparision to boiling water itself because _ ?
- a) Temperature of the stream is higher,
- b) Stream enters the body pores rapidly,
- c) Stream is a gas and rapidly covers the body,
- d) Stream has latent heat
Answer : d) Stream has latent heat
No.-22. One Kilo Calorie heat will be equal to _ ?
- a) 4.2 joule,
- b) 4.2 x 102 Joule,
- c) 4.2 x 103 Joule,
- d) 4.2 x 104 Joule
Answer : c) 4.2 x 103 Joule,
No.-23. Ball pen works on the principle of _ ?
- a) Viscosity,
- b) Boyle’s Law,
- c) Gravitational force,
- d) Capillarity and surface tension
Answer : d) Capillarity and surface tension
No.-24. The apparatus used in submarines to give clear view of the objects on the surface of the ocean or ground is known as _ ?
- a) Periscope,
- b) sectant,
- c) stereoscope,
- d) telescope.
Answer : a) Periscope,
No.-25. Growth of the baby in the uterus is found using _ ?
- a) X-rays,
- b) Gamma rays,
- c) Ultra sound,
- d) Ultra Violet rays
Answer : c) Ultra sound,
No.-26. The form of matter are _ ?
- a) 3,
- b) 4,
- c) 5,
- d) 7
Answer : a) 3,
No.-27. The Period of revolution round the sun is maximum by which among the following planets?
- a) Mercury,
- b) Venus,
- c) Earth,
- d) Mars
Answer : d) Mars
No.-28. Einstein got the Nobel prize for?
- a) Theory of Relativity,
- b) Photo-electric effect,
- c) Polarisation,
- d) Radio activity
Answer : b) Photo-electric effect,
No.-29. Galvanometer can be converted into a voltmeter by using?
- a) Low resistance in series,
- b) High resistance in series,
- c) Low resistance in parallel,
- d) High resistance in parallel
Answer : b) High resistance in series,
No.-30. If a red-green flag is seen in green light it appears to be of which of the following colour?
- a) Green,
- b) Black,
- c) Black-Green,
- d) Red-Black
Answer : c) Black-Green,
No.-31. Which among the following is the surface to surface missile that is made in India?
- a) Dharti,
- b) Akash,
- c) Prithivi,
- d) Naag
Answer : c) Prithivi,
No.-32. Lightning conductors are made up of _ ?
- a) Iron,
- b) Aluminium,
- c) Copper,
- d) Steel
Answer : c) Copper,
No.-33. The I.C Chip used in a computer is made up of _ ?
- a) Silicon,
- b) Chromium,
- c) Gold,
- d) Lead
Answer : a) Silicon,
No.-34. Which planet is nearest to the earth?
- a) Mercury,
- b) Jupiter,
- c) Venus,
- d) Mars
Answer : d) Mars
No.-35. The Element of an electric heater is made of _?
- a) Nichrome,
- b) Copper,
- c) Aluminum,
- d) None of these
Answer : a) Nichrome,
No.-36. When water is heated from 0 degree Celsius to 100 degree Celsius, the volume of water?
- a) Increase gradually,
- b) Degrease gradually,
- c) First increase, then decrease,
- d) First decrease , then increase.
Answer : d) First decrease , then increase.
No.-37. An ice cube is floating on the surface of water: How will the water level be affected by melting of this ice cube?
- a) Water level will be raised,
- b) Water level will go down,
- c) Water level will remain the same,
- d) Water level will first rise up then it will go down
Answer : c) Water level will remain the same,
No.-38. What will be the effect on gravitational acceleration if the earth suddenly stops its rotation?
- a) It will reduce at the poles,
- b) It will increase at the poles,
- c) It will decrease at the equator,
- d) It will increase at the equator
Answer : b) It will increase at the poles,
No.-39. Ohmic conductor among the following is _ ?
- a) Transistor,
- b) Thermal value,
- c) Electrolyte,
- d) Constantum
Answer : d) Constantum
No.-40. Persistence of vision is the principle behind?
- a) Camera,
- b) spectroscope,
- c) Cinema,
- d) Periscope
Answer : c) Cinema,
No.-41. The weight of a body is _ ?
- a) The same everywhere on the surface of the earth,
- b) Maximum at the poles,
- c) Maximum at the equator,
- d) More on the hills than in the plains
Answer : b) Maximum at the poles,
No.-42. At what temperature a body will not radiate any heat energy?
- a) 0 degree C,
- b) 273 degree C,
- c) 100 degree C,
- d) -273 degree C
Answer : d) -273 degree C
No.-43. Which metal is commonly used for making an electromagnet?
- a) Copper,
- b) Iron,
- c) Nickel,
- d) Cobalt
Answer : b) Iron,
No.-44. The ozone layer protects us from?
- a) Ultra violet rays,
- b) Radio waves,
- c) Visual radiation,
- d) Infrared radiation
Answer : a) Ultra violet rays,
No.-45. Fire in the diesel engine is produces by which of the following?
- a) Compression,
- b) Spark plug,
- c) Friction,
- d) Self starter
Answer : a) Compression,