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Alternating Current — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsAlternating Current3 Marks
Question
What is Global Positioning System? Explain its working principle in brief.
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Answer

Global Positioning System is method of identifying location or position of any point or a person on earth using a system of 24 satellites, which are continuously orbiting, observing, monitoring and mapping the earth.
Working Principle:
  1. The unique location of GPS user is determined by measuring its distance from at least three GPS satellites.
  2. Using these values of distances, obtained from three satellites, a microprocessor, fitted in GPS device, determines the exact location.

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