ch27-p109 - 109. Here we denote the supply emf as V...

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109. Here we denote the supply emf as V (understood to be in volts). The situation is much like that shown in Fig. 27-4, with r now interpreted as the resistance of the transmission line and R interpreted as the resistance of the “consumer” (the reason the circuit has been turned on in the first place – to supply power to some resistive load R ). From Eq. 27-4 and Eq. 26-27 (remembering that we are asked to find the power dissipated in the transmission line ) we obtain 2 line V Pr Rr ⎛⎞ = ⎜⎟ + ⎝⎠ . Now r is considered constant, certainly, but what about R ? The load will not be the same
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