Question

The Power amplifiers generally use transformer coupling because the transformer permits ________

(a) Cooling of the circuit

(b) Impedance Matching

(c) Distortion less Output

(d) Good Frequency Response

The question was posed to me in an online interview.

The doubt is from Class B Output Stage in chapter Differential and Multistage Amplifiers of Electronic Devices & Circuits

Answer 1

Right choice is (b) Impedance Matching

To elaborate: The Power amplifiers generally use transformer coupling because the transformer permits impedance matching. The disadvantage of impedance e matching is that it gives distorted output.