An AC generator of \( 220 \mathrm{~V} \) having internal resistance \( \mathrm{r}=10 \Omega \) a...

An AC generator of ( 220 mathrm{~V} ) having internal resistance ( mathrm{r}=10 Omega ) and external resistance ( mathrm{R}=100 Omega ). What is the power developed in the external circuit? (a) ( 484 mathrm{~W} ) (b) ( 400 mathrm{~W} ) (c) ( 441 mathrm{~W} ) (d) ( 369 mathrm{~W} )