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What consists of changing electric and magnetic fields and does not require a medium?
Wiki User
∙ 13y ago
Electromagnetic radiation - or in other words light!
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoElectromagnetic Wave.
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Why is magnetic field used to deflect electron beam and not an electric field in a television picture tube?
if electric field is used then we have to apply a very high voltage ,or we may require a very long tube.however ,if a magnetic field is used ,even a small field can produce large deflection ,on the other hand ,the required size of the picture tube will be highly reduced .due to this reason,the magnetic field is uesd to deflect the electron beam in T.V. insted of the electric field.
Is a gamma ray an example of a mechanical wave?
No. A gamma ray is a very high frequency electromagnetic wave. Electromagnetic waves propagate as a combination of changing electric field and changing magnetic field. Electromagnetic waves can travel through empty space without any medium. Mechanical waves (such as sound and water waves) propagate by the oscillating particles of the medium - they require a medium to move through.
How does the non-mechanical waves move through the space?
Non-mechanical waves(radio waves) which are sent into space are nothing but electromagnetic waves similar to light waves.Unlike sound waves or water ripples(waves) which require a medium to propagate in,electromagnetic waves are self-sustaining waves.We know that a moving charge causes a magnetic field and a moving magnetic field induces an electric field.Since an electromagnetic wave comprises of both electric waves and magnetic waves which are caused by each other,therefore they dont require a medium for propagation.
What is a non mechanical wave?
It is a wave or transfer of energy that does not require a physical medium. The only type of non-mechanical wave known is electromagnetic. non-mechanical waves are composed of electric waves and magnetic waves.
What wave does not require a medium for energy transfer?
Electro-magnetic waves.
Why does a transformer require alternating current?
In order to induce voltage as an output, a changing magnetic field is needed. To create a changing magnetic field in the transformer a changing current and that is an alternating current.
Can we make magnet without using magnetic material?
Yes. Electromagnets don't require a magnetic material; they just require a conductor and an electric current.
What do magnets have to with electricity?
Faraday showed that a wire passing through a magnetic field will produce electricity. This is how a generator works. Many windings of wire on an armature spin in a magnetic field. This makes electricity.
Which form of energy does not require matter for traveling through space?
Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.Electromagnetic radiation. Energy can also be transmitted by electric fields, by magnetic fields, and by gravitation.
If light was not matter then how does it move?
Light photons are not "mass-less" but they are not particles either. In fact light behaves a bit like electromagnetic waves which is fluctuations of electric and magnetic fields.Maxwell's equations (wave formula) states that a changing electric field creates a magnetic field, and a changing magnetic field also creates an electric field. You can probably already see that a disappearing magnetic field creates an electrical field which will in turn create the magnetic field, and so on.this process continues as one field spawns the next. The result is a wave form which can travel through vacuum of space (it does not require a medium).In the past, it was believed that these waves travelled through a luminiferous aether. A number of scientists searched for the aether (among others Michelson-Morely) but eventually the theory had to be discarded as no evidence was found. Eventually the theory was replaced when Einstein proposed his general theory of relativity.
Why don't electromagnetic waves require any medium to propagate?
Even free space (in olden days named as vacuum) has magnetic and electric properties.
Why is magnetic field used to deflect electron beam and not an electric field in a television picture tube?
if electric field is used then we have to apply a very high voltage ,or we may require a very long tube.however ,if a magnetic field is used ,even a small field can produce large deflection ,on the other hand ,the required size of the picture tube will be highly reduced .due to this reason,the magnetic field is uesd to deflect the electron beam in T.V. insted of the electric field.
Is a gamma ray an example of a mechanical wave?
No. A gamma ray is a very high frequency electromagnetic wave. Electromagnetic waves propagate as a combination of changing electric field and changing magnetic field. Electromagnetic waves can travel through empty space without any medium. Mechanical waves (such as sound and water waves) propagate by the oscillating particles of the medium - they require a medium to move through.
How does the non-mechanical waves move through the space?
Non-mechanical waves(radio waves) which are sent into space are nothing but electromagnetic waves similar to light waves.Unlike sound waves or water ripples(waves) which require a medium to propagate in,electromagnetic waves are self-sustaining waves.We know that a moving charge causes a magnetic field and a moving magnetic field induces an electric field.Since an electromagnetic wave comprises of both electric waves and magnetic waves which are caused by each other,therefore they dont require a medium for propagation.
How inductance is produced when electric current passes through a conductor?
Electric charges interact with changing magnetic fields. All magnetic field changes can be thought of as the magnetic field moving. If the magnetic field strength is increasing then it is the same as a magnet being brought nearer while a decreasing magnetic field is the same as if a magnet is being pulled away.The force a charge experiences is the result of several factors. The direction of the force depends on the polarity of the charge, whether it is positive or negative, the direction of the magnetic field and the direction of relative motion between the charge and magnetic field. The magnitude of the force, its strength, depends upon the amount of charge, the strength of the magnetic field and the speed of the relative motion between them.So you can make charges inside a piece of wire move by waving a magnet near the wire. If the wire makes a circuit, then you get electric current flowing through that circuit. A generator is a device which uses the interaction between charges and changing magnetic fields to create electric current. Generators require a source of mechanical energy to run. Portable generators typically use gasoline while generators used by the electric power company can be driven by water, wind, coal, natural gas or the heat from nuclear fission. Coal is the most common source of energy for electricity in the United States.
Why electromagnetic rays do not require any medium?
Because electromagnetic wave propagation is nothing but the propagation of electric and magnetic energy. Free space has the characteristics such electrical permittivity and magnetic permeability. So in modern terms free space is also considered as a medium but of course a non material medium.
Why transformer not produce DC current?
because transformer in made inductorAlternative AnswerTransformers are AC machines, and do not work with DC. This is because they require an alternating current to set up an alternating magnetic flux which then induces an alternating voltage into its secondary. Remember, there has to be a changing magnetic flux and a conductor for an emf. to be induced into that conductor.
