Engine: Electricity

1. A The transducer converts audio frequency (AF) electromagnetic energy to acoustic energy while transmitting and converts the reflected acoustic energy back into AF electromagnetic energy while receiving.
2. B The transducer converts radio frequency (RF) electromagnetic energy to acoustic energy while receiving and converts the reflected acoustic energy back into RF electromagnetic energy while transmitting.
3. C The transducer converts audio frequency (AF) electromagnetic energy to acoustic energy while receiving and converts the reflected acoustic energy back into AF electromagnetic energy while transmitting.
4. D The transducer converts radio frequency (RF) electromagnetic energy to acoustic energy while transmitting and converts the reflected acoustic energy back into RF electromagnetic energy while receiving.

Tip: press A-D to answer