Download PDF for physics GK questions with answer

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physics gk questions with answer


1. What is the unit of Light Year?

 A) Distance

 B) Time

 C) intensity of light

 D) force

ANSWER= (A) Distance


 


2. What is the SI unit of light intensity?

 A) Om

 B) Watt

 C) Candela

 D) lumens

ANSWER= (C) Candela



3. What is commonly used in a magnifying glass?

 A) convex mirror

 B) convex lens

 C) concave mirror

 D) concave lens

ANSWER= (B) Convex lens

 


4. What is the speed of sound in the air?

 A) 232 m/s

 B) 332 m/s

 C) 320 m/s

 D) 432 m/s

ANSWER= (B) 332 m/s


30. Sound is an example of which type of wave?

 A) transverse mechanical wave

 B) longitudinal mechanical wave

 C) transverse nonmechanical wave

 D) Longitudinal non-mechanical wave

ANSWER= (B) Longitudinal mechanical wave


6. What is the normal temperature of the human body?

 A) 290 Kelvin

 B) 300 Kelvin

 C) 310 Kelvin

 D) 350 Kelvin

ANSWER= (C) 310 Kelvin


7. Light is an example of which type of wave?

 A) transverse wave

 B) longitudinal wave

 C) Both of the above

 D) none of these

ANSWER= (A) transverse wave


8. A heater coil is made of which element?

 A) Tungsten

 B) copper

 C) iron

 D) Nichrome

ANSWER= (D) Nichrome

 


9. What is the smallest unit of length?

 A) Micron

 B) nanometer

 C) Fermimeter

 D) centimeter

ANSWER= (C) Fermimeter



10. Which type of mirror is used for shaving?

 A) concave mirror

 B) convex mirror

 C) plane mirror

 D. ALL OF THE ABOVE

ANSWER= (A) concave mirror



11. Which scientist invented the positron?

 A) JJ Thomson

 B) Rutherford

 C) Anderson

 D) Goldstein

ANSWER= (C) ANDERSON



12. What is the unit of Curie?

 A) Radioactivity

 B) temperature

 C) Energy

 D) power

ANSWER= (A) radioactivity


13. Relative humidity is measured by?

 A) Hydrometer

 B) Hygrometer

 C) Lactometer

 D) barometer

ANSWER= (B) Hygrometer



14. Sound waves with a frequency of more than 20000 are an example of which type of wave?

 A) Ultrasonic wave

 B) audio wave

 C) inaudible wave

 D) none of these

ANSWER= (C) Infrared wave


15. Which type of mirror is used in front of vehicles

 A) convex mirror

 B) concave mirror

 C) plane mirror

 D) parabola mirror

ANSWER= (A) convex mirror



16. By which of the following electrical energy is converted into mechanical energy

 A) Dynamo

 B) Transformer

 C) electric motor

 D) indicator

ANSWER= (C) Electric Motor


17. If the length of a resistive wire is increased, what will be the effect on its resistance?

 A) grows

 B) decreases

 C) remains constant

 D. ALL OF THE ABOVE

ANSWER= (A) increases



18. Which of the following is the light with the shortest wavelength?

 A) Red

 B) Yellow

 C) blue

 D) Violet

ANSWER= (D) Violet



19. Photon is the fundamental unit of –

 A) Light

 B) Gravity

 C) Electricity

 D) Magnetism

ANSWER= (A) light


 

20. At what temperature is the density of water highest?

 A) – 4 °C

 B) 0 °C

 C) 4 °C

 D) – 1 degree Celsius

ANSWER= (C) 4 °C


21. ​​Heavy water is used in a nuclear reactor as

 A) coolant

 B) Controller

 C) Examiner

 D) diluent

ANSWER= (D) diluent



22. By which instrument the intensity of an earthquake is measured?

 A) Seismograph

 B) barometer

 C) Anemometer

 D) Lactometer

ANSWER= (A) Seismograph

 


23. 1 horsepower is equal to how many watts?

 A) 435 watts

 B) 746 watts

 C) 796 watts

 D) 876 watts

ANSWER= (B) 746 Watts

 


23. In which direction does a freely hanging magnet always stay?

 A) in the north-east direction

 B) in the south-west direction

 C) in the north-south direction

 D) in the north-west direction

ANSWER= (C) in north-south direction


 


24. The electrical resistance of a conductor is independent of

 A) temperature

 B) pressure

 C) Area of ​​cross-section

 D) Length

ANSWER= (B) pressure

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