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.
Power delivered, P = voltage ×× current =VI=VI or I=P/VI=P/V. If RcRc is the resistance of transmission line then power wasted, PC=l2RC=P2v2RCPC=l2RC=P2v2RC In order to reduce P_(C),VP_(C),V should be large. Therefore the power should be transmitted at high voltage.
