Power P is to be delivered to a device via transmission cables having resistance RC. If V is the voltage across R and I the current through it, find the power wasted and how can it be reduced.


The power is wasted as heat through the resistance RC in the transmission cables.


I is the current that flows through RC.


Hence, the power wasted


We know, Power


For a constant value of power, magnitude of I is low for a high magnitude of V and magnitude of I is high for a low magnitude of V.


Hence, in order to reduce wastage of power magnitude of I should be low and magnitude of V should be high.


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