Physics General Knowledge Questions and Answers

13. Light from the sun reaches earth in about
  A.  2 minutes
  B.  4 minutes
  C.  8 minutes
  D.  16 minutes
Answer
Ans: C
8 minutes
14. Pyrometer is used to measure
  A.  Humidity
  B.  High temperature
  C.  Air pressure
  D.  Intensity of earthquake
Answer
Ans: B
High temperature
15. What is the source of electrical energy in an artificial satellite?
  A.  Solar cell
  B.  Thermopile
  C.  Mini nuclear reactor
  D.  Dynamo
Answer
Ans: A
Solar cell
16. The least distance of distinct vision for human eye is
  A.  5 cm
  B.  25 cm
  C.  75 cm
  D.  100 cm
Answer
Ans: B
25 cm
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