Question

Find the value of R that results in maximum power transfer to the 10 $\Omega$ resistor. Also find the maximum power $\left(P_{max}\right)$

• A. $R=0,P_{max}=0.1W$
• B. $R=20\Omega ,P_{max}=1.6W$
• C. $R=0,P_{max}=1.6W$
• D. $R=\infty ,P_{max}=1.6W$

Answer 1

The correct option is C $R=0,P_{max}=1.6W$

In this circuit , load resistance is constant hence maximum power transfer theorem can not be applied.
Hence, for maximum power in $10\Omega$ resistance, current through it should be maximum. That means $R=0$ will give maximum power in $10\Omega$ resistance.
$P_{max}\Rightarrow$


$\Rightarrow P_{max}=\frac{(12-8{)}^2}{10}=1.6W$