Impedance matching. Example 28.2 showed that maximum power is transferred when the internal resista…



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Impedance matching. Example 28.2 showed that maximum power is transferred when the internal resistance of a DC source is equal to the resistance of the load. A transformer may be used to provide maximum power transfer between two AC circuits that have different impedances Z 1 and Z 2 where 1 and 2 are subscripts and the Z #x27;s are italic (as in the centered equation). (a) Show that the ratio of turns N_1 / N_2 needed to meet this condition is N_1/N_2=√(Z_1/Z_2). (b) Suppose you want to use a transformer as an impedancematching device between an audio amplifier that has an output impedance of 8.00 k Ωand a speaker that has an input impedance of 8.00 Ω. What should your N_1 / N_2 ratio be?

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