In the circuit of Figure 13, A = 20, Rs = 100 ohms, Ri = 10 kohms, Ro = 50 ohms

Question

In the circuit of Figure 13, A = 20, Rs = 100 ohms, Ri = 10 kohms, Ro = 50 ohms and RL = 1 kohm. (Note that these parameter values are not the same as the ones in Question 2.)

Find the ratio of PL (the power delivered to the load RL) to Ps (the power delivered by the source Vs).

Correct answer ( 3,592.2)

In the circuit of Figure 13, A = 20, Rs = 100 ohms, Ri = 10 kohms, Ro = 50 ohms and RL = 1 kohm. (Note that these parameter values are not the same as the ones in Question 2.)

Find the ratio of PL (the power delivered to the load RL) to Ps (the power delivered by the source Vs).

Correct answer ( 3,592.2)

Explanation / Answer

vL = Av1 * RL / (RL + Ro) = 20V1 * 1000/1050 = 19.04 V1

PL = vL2 / RL = 362.81 V12 / 1000 = 0.362 V12

V1 = VS * 10000 /(10000+100) = 0.99 VS

PL = 0.359 VS2

PS = VS2 / (Rs + Ri)

PL /Ps = 3590

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