Question

Which of the following is not a transducer?

• A. Loud speaker
• B. Amplifier
• C. Microphone
• D. All of these

Answer 1

Answer: (B)

Amplifier

According to the definition,

A transducer is a device which converts one form of energy to another,

Taking into consideration the options,

Microphone converts vibrations caused by sound energy to electrical impulse,

Speaker converts electrical impulses into mechanical vibrations of a diaphragm

leading to audible sound waves.

Amplifier converts low amplitude electric impulses into high amplitude electric

impulses.

In all the three cases except the amplifier, each one converts one form of energy

to another,

Hence Amplifier $\text{(B)}$ is the right answers.