Question

A device that converts high frequency current into electromagnetic waves.
A) Antenna.
B) Loudspeaker
C) Microphone.
D) Transponder.

Answer 1

The device is an equipment that can help us in better functioning in some type of activity or can also help us improve the output of the activity that is being done. A device usually is made such that it changes one form of energy into another form of energy also some time it only changes one signal into another in order to help the person to perform a certain activity.

Complete step by step answer:
It is given in the problem that there is a device which can convert the high frequency current into electromagnetic waves and we need to find which device is that from the given options.
We can consider each option one by one and get to the final answer.

Let us consider Option A,
Antenna
An antenna is a device that converts high frequency current into electromagnetic waves which helps the antenna for transmission.

Let us consider the option B,
Loudspeaker.
A loudspeaker is a device that converts an electrical audio signal into a corresponding sound. It is used to enhance the volume for larger groups to listen to the speech or music.

Let us consider option C,
Microphone.
A microphone is a device that converts sound energy into the electrical current and we can record it or listen on the speaker.

Let us consider option D,
Transponder.
A transponder is a device that responds to the incoming signals by converting one form of signal into another form of signal.
A device that converts high frequency current into electromagnetic waves is an antenna.
The correct option for this problem is option A.

Note: The antenna is a device which can transmit electromagnetic waves which can be done by a transmitter or a receiver. A transponder is a device which automatically responds if there is any incoming signal.