Fig. $18-29$

Fig. $18-30$

$11$g$.10-31$

For the next three problems, refer to Fig. $18-32.$

Fig. $18-32$ Circuit used to illustrate maximum transfer of power from amplifier output to the speaker load.

What should be the amplifier's output impedance for maximum transfer of power?

With a signal of $32$ Vp $-$p across the primary, what would be the primary current?

How much power is delivered to the speaker load with $128Vp-p$ across the primary?