0
Add your answer:
Earn +20 pts
Explain the basic principle of working of radio?
Radio is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.
What are the rays in the cathode ray tubepositive or negative or neutral?
The rays produced in a cathode tube in early experiments were actually just streams of electrons. They had a negative charge, which was discovered by JJ Thomson when he placed a magnet next to his cathode ray tube and say the ray bend.
Which scientist used the cathode ray tube to isolate the electron in 1897?
J.J. Thomson used the cathode ray. Thomson's cathode ray experiment was when he shot a narrow beam of electrons through a cylindrical tube and deflected the electrons off of electric and magnetic fields, thus measuring the effects that those fields had on the direction of the beam.
How does mobius coil generate electricity?
A mobius coil doesn't generate electricity by itself. If power is applied to function the mobius coil, positive and negative fields applied in opposing direction, then they cancel each others field out supposedly producing a scalar wave. A scalar wave is part of the Quantum theory of particle-wave duality.
What is narrow bandwidth antenna?
An antenna (or aerial) is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter applies an oscillating radio frequency electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified. An antenna can be used for both transmitting and receiving.Antennas are essential components of all equipment that uses radio. They are used in systems such as radio broadcasting, broadcast television, two-way radio, communications receivers, radar, cell phones, and satellite communications, as well as other devices such as garage door openers, wireless microphones, bluetooth enabled devices, wireless computer networks, baby monitors, and RFID tags on merchandise.Typically an antenna consists of an arrangement of metallic conductors ("elements"), electrically connected (often through a transmission line) to the receiver or transmitter. An oscillating current of electrons forced through the antenna by a transmitter will create an oscillating magnetic field around the antenna elements, while the charge of the electrons also creates an oscillating electric field along the elements. These time-varying fields radiate away from the antenna into space as a moving electromagnetic field wave. Conversely, during reception, the oscillating electric and magnetic fields of an incoming radio wave exert force on the electrons in the antenna elements, causing them to move back and forth, creating oscillating currents in the antenna.Antennas may also contain reflective or directive elements or surfaces not connected to the transmitter or receiver, such as parasitic elements, parabolic reflectors or horns, which serve to direct the radio waves into a beam or other desired radiation pattern. Antennas can be designed to transmit or receive radio waves in all directions equally (omnidirectional antennas), or transmit them in a beam in a particular direction, and receive from that one direction only (directional or high gain antennas).The first antennas were built in 1888 by German physicist Heinrich Hertz in his pioneering experiments to prove the existence of electromagnetic waves predicted by the theory of James Clerk Maxwell. Hertz placed dipole antennas at the focal point of parabolic reflectors for both transmitting and receiving.
Oscillating electrons generate changing fields?
Fcjf
How can electromagnetic waves be produced?
Electromagnetic waves are produced by accelerating electric charges. This acceleration can occur in various ways, such as in antennas where changing electric currents create oscillating charges, or in light bulbs where moving electrons through a filament generate photons.
What is the phase relation between oscillating electric and oscillating magnetic fields in an electromagnetic wave?
The fields are in time phase and space quadrature.
What causes electric magnetic wave?
Electromagnetic waves are caused by changing electric fields which create magnetic fields, and changing magnetic fields which create electric fields. These waves propagate through space at the speed of light and carry energy. They are produced by accelerating charged particles or by oscillating electric currents.
As an electromagnetic wave travels its energy is carried through?
the oscillating electric and magnetic fields. These fields are perpendicular to each other and to the direction of the wave's propagation. Energy is transferred as the fields interact with charged particles in the medium through which the wave is traveling.
Can an electric current generate an electromagnetic wave?
Yes, an electric current can generate an electromagnetic wave. When an electric current flows through a conductor, it creates a magnetic field around the conductor. This changing magnetic field then generates an electromagnetic wave, which consists of oscillating electric and magnetic fields propagating through space.
How does a vibrating electric charge produce an electromagnetic wave?
When an electric charge vibrates, it creates changing electric and magnetic fields. These changing fields propagate through space, creating electromagnetic waves. The oscillating electric field produces a magnetic field, and the changing magnetic field then produces an electric field, thus creating a self-sustaining wave.
Phase relationship between oscillating electric and magnetic fields?
nothing
Which describes an electromagnetic wave?
A transverse wave consisting of changing electric fields and changing magnetic fields
What are two ways to produce electric fields electric fields are produced by charged particles or by changing magnetic fields?
One way to produce an electric field is through the presence of charged particles. When charged particles, such as electrons or protons, are stationary or in motion, they generate an electric field around them. Another way to produce an electric field is through changing magnetic fields. According to Faraday's law of electromagnetic induction, a changing magnetic field induces an electric field, causing the flow of electric charges.
Oscillating electric and magnetic fields regenerate each other These oscillating fields perpetuate?
This phenomenon is known as electromagnetic wave propagation, described by Maxwell's equations. An oscillating electric field induces a magnetic field, which in turn produces an oscillating electric field. This interplay allows electromagnetic waves to propagate through space without the need for a medium.
What is the kind of wave formed by an electric fields and a magnetic fields oscillating at right angles to each other?
Electromagnetic wave.
