Soal Ulangan Mid Semester I Tik Kelas VII

Explanation
The correct answer, c. komunikasi jarak jauh menggunakan alat modern, refers to telecommunications, which is the exchange of information over long distances using modern devices. This includes various forms of communication such as telephone, internet, and satellite communication.

Explanation
Komunikasi dua arah adalah istilah lain untuk menggambarkan cara mengirim pesan dari satu pengirim ke satu penerima. Dalam komunikasi dua arah, ada interaksi yang terjadi antara pengirim dan penerima di mana keduanya dapat saling bertukar pesan dan memahami satu sama lain. Ini berbeda dengan komunikasi searah, di mana pesan hanya dikirim dari pengirim ke penerima tanpa adanya interaksi balik. Istilah point to point dan point to multipoint lebih mengacu pada metode pengiriman pesan secara fisik atau teknis, bukan pada interaksi antara pengirim dan penerima.

Explanation
A telephone is a telecommunication device that converts sound into electrical energy and transmits it through a cable. It allows individuals to communicate with each other by speaking into a microphone and listening through a speaker or earpiece. This technology revolutionized communication by enabling real-time voice conversations over long distances.

Explanation
FM (Frequency Modulation) is a radio wave modulation system that produces high-quality sound. It works by varying the frequency of the carrier wave in proportion to the amplitude of the input signal. This modulation technique allows for a wider frequency range and better resistance to noise compared to other modulation systems like AM (Amplitude Modulation) or PM (Phase Modulation). Therefore, FM is the correct answer for a radio modulation system that produces high-quality sound.

Explanation
Hand phone (also known as mobile phone or cellphone) is a telecommunication device that allows communication to take place anywhere and at any time. It is portable and can be carried around, enabling individuals to make calls, send messages, and access the internet on the go. Hand phones have become an essential tool for communication in today's modern society.