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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