Current Electricity and Electrical InstrumentMedium
Question
A battery with EMF E and internal resistance $r$ is connected across a resistance $R$. The power consumption in R will be maximum when:
Options
A.$R = 2r$
B.$R = \frac{r}{2}$
C.$R = \sqrt{2}r$
D.$R = r$
Solution
For maximum power drawn across load Resistance $R_{\text{Load~}} = R_{\text{internal~}}$
$$R = r$$
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