A Transformer-Coupled Class a Amplifier with a Transformer Turns Ratio

question 28

Multiple Choice

A transformer-coupled class A amplifier with a transformer turns ratio of 4:1 and a value of RL = 25 Ω draws 220 mW from its dc power supply. What is the efficiency of the circuit?

• A) 20.5%
• B) 27.3%
• C) 40.9%
• D) 73%

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Definitions:

Lorenz

An Austrian zoologist and ethologist known for his foundational contributions to the study of animal behavior, especially the concept of imprinting in early development.

Ethology

The study of behaviors that are specific to a species—how these behaviors evolved, help the organism adapt, and develop during critical periods.

Fixed Action Patterns

Innate, preprogrammed responses triggered by specific stimuli, observed in animal behavior.

Phenotypic

Referring to the observable characteristics or traits of an organism, which result from the interaction of its genotype with the environment.