A source \({V_s}\left( t \right) = Vcos100\pi t\) has an internal impedance of (4 + 3j) Ω, if a purely resistive load is connected at load to extract Pmax , then its value is (in ohms)

A source \({V_s}\left( t \right) = Vcos100\pi t\) has an internal imp

1.	A source \({V_s}\left( t \right) = Vcos100\pi t\) has an internal impedance of (4 + 3j) Ω, if a purely resistive load is connected at load to extract Pmax , then its value is (in ohms)
A.	3
B.	4
C.	5
D.	7
Answer» D. 7