A DC source with internal resistance R_0 is c | vedclass

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Question

(B) According to the maximum power transfer theorem,the power delivered to the external circuit is maximum when the external resistance $R_{eq}$ equal

Vedclass · Accepted Answer

$R=3 R_0$

Vedclass · Answer

(B) According to the maximum power transfer theorem,the power delivered to the external circuit is maximum when the external resistance $R_{eq}$ equals the internal resistance $R_0$ of the source.By analyzing the circuit diagram,we can see that all three resistors of resistance $R$ are connected in parallel between the two nodes of the circuit.The equivalent resistance $R_{eq}$ of three resistors each of resistance $R$ connected in parallel is given by:$\frac{1}{R_{eq}} = \frac{1}{R} + \frac{1}{R} + \frac{1}{R} = \frac{3}{R}$Therefore,$R_{eq} = \frac{R}{3}$.For maximum power,we set $R_{eq} = R_0$:$\frac{R}{3} = R_0$$R = 3 R_0$.

$A$ $DC$ source with internal resistance $R_0$ is connected to three identical resistors,each of resistance $R$,as shown in the figure. If the thermal power generated in the circuit is highest,then

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