Question

An alternating current generator has an internal resistance $R_g$ and an internal reactance $X_g$. It is used to supply power to a passive load consisting of a resistance $R_g$ and a reactance $X_L$. For maximum power to be delivered from the generator to the load, the value of $X_L$ is equal to

• A. $X_g$
• B. zero
• C. $-X_g$
• D. $R_g$

Answer 1

The correct option is C $-X_g$

For maximum power to be delivered from the generator to the load, the total reactance should be equal to zero.

$X_L+X_g=0$

$\Rightarrow X_L=-X_g$

Final Answer: $-X_g$