Answer question 12 showing fully all the steps. Solution should be simplified and easy to understand as much as possible! 8) A ship is sailing with the part submerged of about 80 m. The crew emits high frequencysound pulses into water from a RADAR and wait for the reflected signal. Il the averagespeed of sound in water is 520 m s, estimate a value for the time lapse between theemission of the pulse and reception of the reflected signal if the sailors are assured that thescan continue on the same route with no deviations for fear of obstacles. Justify your answer.9) a) What is a base station?b) State the role of a base station and a cellular exchange during the making of a call from amobile phone handset.10) Discuss the impact of mobile phones on the society ona) disaster responseb) human healthc) etiquette11) A simple tuning radio circuit has an inductor of inductance 6.0 mH and a frequency of1015 Hz. Calculate the value of the capacitance required for its functioning.12) In a mobile phone telecommunication system state the role ofa) the base stationb) SIMc) PSTN13) In a tabular form, compare the wire pair and the fibre optic as communication channelsunder the following headings:a) description (what they are)b) advantages and disadvantages14) a) State 2 advantages and 2 disadvantages of A.M over F.M broadcasting.b) A radio broadcast is transmitted using amplitude modulation at a carrier frequency of6.80 x 102 Hz between the lower side band and upper side band. Give the meaning ofeach of the underlined phrases.15) a) Draw a sketch to show the main steps that an information signal goes through before itis transmitted over long distances using radio systems.b) Name 2 ways by which radio waves can travel from a transmitting aerial.c) What do you understand by telecommunication?16) a) Draw the block diagram of a mobile phone handset and explain it in brief.bi State 2 differences between a mobile phone and a walkie talkie or a community basedradio.c) What are the full meanings of the abbreviations: SIM, SMS, MMS, MIN, MTSO, PSTN.CODEC, Wi-Fi and MODEM?

Question

Accepted Answer

The Impact of mobile phone on society on 
a)Disaster response
Social Impact Social life has been…