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Reading Comprehension Part - 7 (Hindi)
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This lesson presents the important questions of reading comprehension for NTA UGC NET.

Sandeep
Co-founder of BSI Academy and running YouTube channel. 5 years of teaching experience. Qualified in UGC NET & CSIR in Computer Science as JR

U
Unacademy user
  1. NTA UGC NET Paper - 1


  2. About Me Sandeep M.Tech (IT) from IIIT CSIR (Engineering Science) as JRF UGC NET (JRF) Computer Science & Applications Worked as Software Engineer & Research Scientist


  3. Reading Comprehension


  4. Part - 7


  5. unacademy 09 45:14PM Follow me on the Unacademy Learning App 127.1k Sandeep Singh Educator since May 2018 Co-founder of BSI Academy 5 years of teaching Qualified in UGC NET in Computer Science and its .Get updates about new courses Watch all my lessons Download slides and watch offline Application as JRF&lecturer 147k 0 34 Follow All courses Q Sandeep Singh HINDI Programming in C&C (Hindi) Concepts of Objects Oriented Programming CBSE UGC NET (6 rating Sandeep Singh


  6. There is always implication of one scientific invention in other areas, sometimes least expected. In this context the use of local GPS technology that has become so ubiquitous among the earth people has been taken to decipher mysteries of the universe. Cosmic GPS would employ pulsing stars, not satellites, as celestial beacons and this will be done by the frequency "fingerprints" that are left by the massive electromagnetic disbursals that are emitted in the region of pulsars. This is quite similar to finding your favorite coffee shop in an unknown city getting directions via satellite, The analogy works in the same way by a positioning system based on blinking stars instead of satellites.


  7. The principle behind the pulsar positioning is not too different from ordinary GPS. The GPS receiver in a car or phone receives radio signals from satellites orbiting the earth The satellites are synchronized with atomic clocks to emit signals simultaneously. Because the satellites are all at different distances from the receiver, each message reaches the device at a different time. From these time differences, a GPS device infers the distance to each satellite, and hence can calculate its own position The best devices can pinpoint your location to within one metre under ideal conditions, but tall buildings or other interference can throw them off by 10 to 20 metres or more. Though, the navigation system proposed by Italian scientist Tartaglia and colleagues is just a proof of the concept, a GPS-like system under construction in Europe called Galileo could implement the ideas within a decade, he says.


  8. There are but few technical glitches that arise, ironically due to scientific anomalies. Because the satellites move so fast (they orbit the earth twice every day), Einstein's special theory of relativity must be considered. Relativity requires that clocks on board tick slower than those on earth. After two minutes, the satellite's clocks are already out of sync with earth clocks. Transmitting the correct time to each satellite is a constant chore of the Department of Defense, which determines the real time from an ensemble of clocks on earth, A pulsar's regular blips can be used to tell time just like the signals received from GPS satellites. But the math in the new pulsar-based system already accounts for relativity, so these corrections are not necessary. Further, pulsar based systems may not be as precise as GPS, but they could be a backup system for GPS if the ground control for the satellite fails.


  9. Q. 1 Consider the following statements regarding ordinary GPS 1. A GPS device can calculate its own position. 2. It employs pulsing stars as beacons. 3. Satellites orbiting the earth send radio signals to a GPS receiver. Which of the above statements are incorrect, as per the passage? [A] Only 1 [B] Only 2 [C] 2 and 3 [D] 1 and3


  10. Q. 1 Consider the following statements regarding ordinary GPS 1. A GPS device can calculate its own position. 2. It employs pulsing stars as beacons. 3. Satellites orbiting the earth send radio signals to a GPS receiver. Which of the above statements are incorrect, as per the passage? [A] Only 1 [B] Only 2 [C] 2 and 3 [D] 1 and3


  11. Q. 2 This question consists of an Assertion (A) and a Reason (R). Indicate your answer by selecting the correct alternative Assertion (A): In designing an ordinary GPS system, Einstein's special theory of relativity.is used. Reason (R): The satellites used in this system take 12 hours to orbit the earth [A] Both A and R are right and R is the correct explanation for A [B] Both A and R are right but R is not the correct explanation for A [C] A is right but R is wrong [D] A is wrong but R is right


  12. Q. 3 Consider the following statements regarding GPS systems 1. Tall buildings in the path of GPS waves will not affect the accuracy of a GPS system. 2. A pulsar based GPS system can be used as an emergency alternative to ordinary GPS 3. Pulsar based GPS systems do not require corrections due to Einstein's special theory of relativity. Which of the above statements are incorrect, as per the passage? [A] 1 and 2 [B] Only 1 [C] 2 and 3 [D] Only 2


  13. Q. 5 Which of the following will be a suitable title for the passage? IA] Limitations of GPS [B] The Technology behind GPS [C] GPS and its Future [D] An Application of Einstein's Special Theory of Relativity


  14. Q. 5 Which of the following will be a suitable title for the passage? IA] Limitations of GPS [B] The Technology behind GPS [C] GPS and its Future [D] An Application of Einstein's Special Theory of Relativity


  15. Thank You