Each type of energy conversion should be investigated separately. The example you mention - converting radio waves to electrical energy - works as follows: The electromagnetic wave (the radio wave) arrives at an antenna as an alternating electrical and magnetic field - so this will quite naturally induce an electrical current (alternating current).
They were built because the windmill allowed the farmers and their families to have electric lights and radio.
It could be to filter out outside interference from getting out or in. Radio equipment needs good filtering in the supply.
mordern converniences like the refrigarator,televesion,radio,electric fan,airplaines and manyothers are products of science and technology??...
A wireless charger is a device that transmits electric energy through magnetic (radio) waves.The basic principle behind the function of the device is explained in either 6th or 8th grade physics: electrons traveling through electric wires or other conducting objects generate magnetic forces perpendicular to the flow of electric power and any magnetic field perpendicular to the wire generates electric energy in the wire. By twisting a wire into a coil, the magnetic field is then concentrated and focused, thus forming an inductive coil (a different name for electromagnet). by placing two of these coils next to each other, alternating current electric power is transferred from one coil to the other. Another place where this phenomenon is found is in the antennae when electric signal is transferred from one antenna to the other one (or more). The distance and efficiency of energy transfer depends on the shape of the antenna and wavelength (frequency) used.This technology is used in TV and radio broadcast, cellphones, wi-fi, power transformers (big ones supplying power to homes and small ones in power bricks), etc, etc...The wireless chargers are usually flat pad-looking devices (the power transmitting antenna) and can be used to charge most common portable devices like cellphones and mp3 players. The power receiving device would have to be modified (the power receiving antenna) or specifically designed to operate with a wireless charger. The wireless chargers usually operate in micro-wave frequency and therefore need to be in close proximity to the device being charged.
-- heating of the conductors somewhere in the circuit, as in toasters and incandescent light bulbs -- mechanical energy if something like a motor is caused to move -- assembling or disassembling molecular bonds, if the current is used to separate compounds or for electroplating etc. -- radiated out into space, if the current is used to generate radio waves -- radiated out into the air, if the current is used to generate sound energy, as in a home-stereo or PA system
An electric drill transforms electrical energy (from a power source) into mechanical energy (for drilling). Other examples of devices that transform energy include a stove (electrical to heat energy) and a radio (electrical to sound energy).
One form of energy that can transfer from one place to another is electromagnetic energy, such as light or radio waves. Electric and thermal energy can also be easily transferred from one location to another.
We transform energy because we need it in a specific form - either for the end-user device (for example, for the radio, we want sound energy), or to transport energy from one place to another (electrical energy is quite useful for this purpose).
In a battery-powered radio, chemical energy stored in the battery is transformed into electrical energy when the battery provides power to the radio's circuitry. This electrical energy is then transformed into sound energy and electromagnetic energy (radio waves) as the radio converts the electrical signals into sound waves that we can hear.
radio,camera,cellphone
When you turn a radio on, electrical energy from the battery is transformed into sound energy and electromagnetic waves, allowing you to hear radio signals.
The radio signal itself, of course, is not an energy transformation - energy transformation means that energy is changed from one type to another. There is an energy transformation when the radio signal is created, and another one when it is absorbed.
Radio energy is used to transmit signals from one location to another through waves in the electromagnetic spectrum.
The electromagnetic wave carries energy from one place to another. These waves consist of oscillating electric and magnetic fields that can travel through a vacuum. Examples of electromagnetic waves include light, radio waves, and X-rays.
By (em) radiation, every signal you pick up by radio, TV, cell phone, etc. carries energy.
There are many objects that perform electric energy, these are just a few examples. Radio Electric fan motor electric cooker electrical kettle doorbell record player food mixer electrical drill I hope this helped!
The main energy-changes are as follows: Chemical (in the battery) to electrical Electrical to sound