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Power P is to be delivered to a device v...

Power P is to be delivered to a device via transmission cables having resistance `R_(C)` lf V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.

Text Solution

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Cable used as transmission cable has power,
P = `I^(2)R_(C)`
`R_(C) `= resstance of cable P = VI
Given power can be transmitted in two different ways.
(1) Low voltage and high current
(2) High voltage and low current
At low voltage and high current power transmitted according to P `prop I^(2)` will be higher.
At low voltage and high current power transmitted according to P `prop I^(2)` will be less.
Thus, when transmission is done at higher voltage dissipation (wastage) will be less.
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