Judiciary Gk Questions and Answers

25. Sound travels fastest in
  A.  Vacuum
  B.  Metal
  C.  Air
  D.  Liquid
Answer
Ans: B
Metal
26. Which of the following is the instrument used to measure atmospheric pressure?
  A.  Hydrometer
  B.  Barometer
  C.  Eudiometer
  D.  Pyrometer
Answer
Ans: B
Barometer
27. The unit of current is
  A.  Ampere
  B.  Ohm
  C.  Coulomb
  D.  Volt
Answer
Ans: A
Ampere
28. The potential difference in electric circuit is
  A.  220 V
  B.  230 V
  C.  240 V
  D.  250 V
Answer
Ans: A
220 V
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