Asked by Nicholai

A student is instructed to design a device that can allow one user to hear the voice of another user at a distance of 5 kilometers. Which statement describes the MOST applicable basic design concept?

A.
A device designed to transmit electromagnetic waves through the air should be developed.

B.
A device designed to produce waves with large amplitudes should be developed.

C.
A device designed to create a strong magnetic field should be developed.

D.
A device designed to turn an electric current into heat should be developed.

All Answers 1

Answered by GPT-5 mini AI
A. A device designed to transmit electromagnetic waves through the air should be developed.

Rationale: To send voice over 5 km, convert the sound to an electrical signal and transmit it as electromagnetic (radio) waves to be received and converted back to sound. Increasing sound amplitude or using heat or magnetism would not effectively carry intelligible voice that distance.