Answer / nitesh

when we have +ve voltage we can not transmit for long
distance cause that will come to 0 volt or voltage get
attenuated but if we have -48 volt that voltage lower to
ground potential losses will be very less couse always
energy flows from higher poitential to lower so so -48
lower potental simply never come to ground potential

hi... if anybody wrote Airport Authority of India(ATC) examination.... pls kindly post the Questions wat they asked... specially in English & Reasonings.... it will useful to all others who are going to write AAI (Electronics) exam....

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