The equivalent circuit of Fig 3 has VT 12 V RT 8 Ohm If th

The equivalent circuit of Fig. 3 has V_T = 12 V R_T = 8 Ohm If the conditions for maximum power transfer exist, determine The value of R_L. The power developed in R_L. The efficiency of the circuit, that is, the ratio of power absorbed by the load to power supplied by the source.

Solution

a) maximum power is transferred to the load=> Rl=Rt= 8ohms

b) power developed in Rl=> Pmax= Vt²/(4*Rl)= 144/32= 4.5watts

c) efficiency of the circuit accordind to maximum power transfer theorem is 50%

Pmax/P *100 => 4.5/9=50% where P= Vt²/(2*Rt)