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When a radio receives a signal, that is not the same as the creation of an electric circuit, and no electricity needs to be returned by way of the ground, as in most forms of wiring. If you were floating in the air, suspended by a hot air balloon, you could still receive radio signals.
An earth wire enhances the signal strength. Large broadcast transmitters still use an earth for efficiency.
Modern, portable radios, have much improved tuning and detection circuits and so do not need an earth to work.
Early radios and crystal sets, need an earth because of the inefficiency of the tuning circuits.
What else can I help you with?
What was used to broadcast from the moon during the Apollo 11 mission?
The LM had an antenna array that could beam signals to Earth. When the astronauts were out on EVA, their suits had radios which beamed signals to the LM, which in turn sent the signals to Earth. The LM acted as relay between the Earth and the suit radios.
What are two uses of electromagnetic radiation in your world on earth?
we use electromagnetic waves in radios and cell phones
What is Connectionless and Connection Oriented?
Connection-Oriented means that when devices communicate, they perform handshaking to set up an end-to-end connection. Connection-Oriented systems can only work in bi-directional communications environments. Connection-less means that no effort is made to set up a dedicated end-to-end connection. Walkie-talkies, or Citizens Band radios are a good examples of connection-less communication.
Does rotation and time have a connection?
Yes, the rotation of the earth does have a connection with time.
What types of emergency radios are there?
There are many types of emergency radios available. Some of the types of radio available include Ham radio, AM radios, FM radios, CB radios and walkie talkies.
Why star connection used in transmission?
Transmission circuits are prone to earth faults.Only star connection permits flow of earth fault current and the operation of earth fault relays.
What types of radios are available from Tivoli Audio?
Tivoli makes portable radios, table radios, Internet radios, hi-fi systems, and although all their radios can connect with iPods, they also make special radios specifically designed for optimal iPod integration.
What kind of radios are used on the space shuttle?
The space shuttle used a variety of radios for communication, including VHF, UHF, S-band, and Ku-band radios. These radios allowed communication with mission control on Earth, other spacecraft, and astronauts during spacewalks. Each radio had specific functions and frequencies for various aspects of the mission.
How do magnets work in radios?
YES! Rare Earth, and electromagnets. Any coil is a magnet once electricity is added. Speakers use them, the receiver uses them and the amplifier uses magnets as well as the power supply and any noise chokes.
How many radios were purchased?
How many radios were purchased when?
What company makes bose radios?
The Bose corporation makes bose radios for your enjoyment. No other company makes the bose radios or any radios quite to their standard.
What are uses for radio waves?
Regular household AM radios pick up stations on frequencies between 550 KHz to 1.7 MHz . . . wavelengths between 176 meters and 545 meters. Regular FM radios pick up stations on frequencies between 88 MHz and 108 MHz . . . wavelengths between 2.8 meters and 3.4 meters. 'Short wave' radios, taxi radios, police radios, CB radios, firetruck radios, aircraft radios, weather radios, satellite radios, toy walkie-talkie radios, cellphone radios, computer WiFi radios, cordless telephone radios, garage door opener radios, Bluetooth radios, 4G iPad radios, and microwave oven radio transmitters all have their own separate frequencies/wavelengths that they operate on, so that they don't all interfere with each other.
