Suppose you want to use a transformer to match the output of an audio amplifier to a speaker.
The amplifier has a purely resistive output impedance of exactly 128 Ω.
The speaker has a purely resistive impedance of exactly 8 Ω.
The primary-to-secondary turns ratio of the transformer should be
a. exactly 1:16.
b. exactly 1:4.
c. variable.
d. exactly 4:1.
e. exactly 16:1
Show Answer
Answer: d
Share your understanding of this question with the correct explanation.