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In a cathode ray tube where do the particles originate towards what Do they move?
Wiki User
∙ 6y ago
The particles originate from the Cathode in the neck of the tube. They are liberated by a heater. The electrons thus liberated are attracted by the Anode, by applying a high voltage to it.
In a CRT there are several anodes, the largest and biggest is formed by a coating inside the tube towards the screen. This attracts and accelerates the electrons in a stream of particles known as a 'cathode ray'. They carry on in a straight line, once accelerated, until they hit the screen and cause a phosphor coating to glow, on the inside surface of the screen.
The cathode ray can be bent from it's course, by using electromagnets arranged around the neck of the tube.
Mylene Wintheiser
Wiki User
∙ 9y agoIn a cathode-ray tube, the particles originate from a cathode. The cathode is the negative terminal. The particles are actually electrons.
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Why does a diode not conduct in reverse bias?
A diode cannot conduct in reverse bias because of the way it was made. If the question is asking about a thermionic vacuum tube diode, the electrons produced by the heated cathode of the tube can only move in one direction: from the cathode to the anode - but only for as long as the anode is positively charged. The reason is that, if the anode is made to be positively-charged, it ATTRACTS electrons - which are negatively charged - from the cathode, so a current flows from cathode to anode in the "normal" biased direction because of the physical fact that UNLIKE CHARGES ATTRACT ONE ANOTHER. If the anode is made to be negatively charged, the electrons won't go to it because of the physical fact that LIKE CHARGES REPEL ONE ANOTHER, so no electrical current can flow from the cathode to a negatively charged anode. (In fact no electrical current can ever flow from a negative anode to the cathode for an entirely different reason: no anode of any normal thermionic vacuum tube was ever designed and made to "produce" electrons in the way that a heated cathode produces them!) To be able to "produce" electrons and let them fly to the positively charged anode, the cathode must be able to receive some more electrons to replace all the ones that have left the space around the cathode. That "supply of more electrons" is called an electric current. That current does not come from nowhere - it has to comes from a source, such as a battery or a generator - and the electrons which reach the anode must then be conducted back to the battery or a generator so that they complete a full electrical circuit by traveling along the wires which connect the source to the diode. Similarly, because of the way it was made, a semiconductor diode behaves in just the same way as a vacuum tube diode: electrons can flow from the negative end to the positive end of the semiconductor diode but not the other way around. The actual reason why a semiconductor diode works like that is very much more complicated to explain than for a vacuum tube diode. Put very simply, a semiconductor diode has the kind of materials inside it that will only allow electrons to flow one way. If a voltage is applied to the diode the wrong way round (called reverse bias) practically no current can flow through the diode.
What is horizontal deflection system in CRO?
in a CRO ,fast moving electrons coming from cathode tube strikes the screen .This is seen as a single dot,but for viewing a waveform it is required that the electrons should move both horizontally as well as vertically. For that purpose a horizontal deflection plate is provided in the cro. This deflection plate is supplied with voltages , so that the electrons passing through these plates get deflected horizontally.due to alternating voltages these electrons deflect right & left very quickly, that we humans fell it is a straight horizontal line due our perception. THE voltages is provided by sweep generator,which produce ramp voltages WHICH IS AMPLIFIED & PROVIDED TO HORIZONTAL DEFLECTION PLATES in a CRO ,fast moving electrons coming from cathode tube strikes the screen .This is seen as a single dot,but for viewing a waveform it is required that the electrons should move both horizontally as well as vertically. For that purpose a horizontal deflection plate is provided in the cro. This deflection plate is supplied with voltages , so that the electrons passing through these plates get deflected horizontally.due to alternating voltages these electrons deflect right & left very quickly, that we humans fell it is a straight horizontal line due our perception. THE voltages is provided by sweep generator,which produce ramp voltages WHICH IS AMPLIFIED & PROVIDED TO HORIZONTAL DEFLECTION PLATES
What is a repel?
to move away from someone or something
What is used to move electrical energy from one place to another?
For all practical purposes, we are still limited by wireswhen we need to move electrical energy.
What are the locations of the transmitter and receiver do not move?
fixed wireless
What is the evidence that show cathode rays consists of charged particles?
in a cathode ray tube the cathode rays move towards the anode(positively charged) fixed plate.
In a cathode-ray tube where do the particles originate towards what do they move?
The particles originate from the Cathode in the neck of the tube. They are liberated by a heater. The electrons thus liberated are attracted by the Anode, by applying a high voltage to it. In a CRT there are several anodes, the largest and biggest is formed by a coating inside the tube towards the screen. This attracts and accelerates the electrons in a stream of particles known as a 'cathode ray'. They carry on in a straight line, once accelerated, until they hit the screen and cause a phosphor coating to glow, on the inside surface of the screen. The cathode ray can be bent from it's course, by using electromagnets arranged around the neck of the tube.
In a cathode ray tube where do the particles originate and what do they move toward?
The particles originate from the Cathode in the neck of the tube. They are liberated by a heater. The electrons thus liberated are attracted by the Anode, by applying a high voltage to it. In a CRT there are several anodes, the largest and biggest is formed by a coating inside the tube towards the screen. This attracts and accelerates the electrons in a stream of particles known as a 'cathode ray'. They carry on in a straight line, once accelerated, until they hit the screen and cause a phosphor coating to glow, on the inside surface of the screen. The cathode ray can be bent from it's course, by using electromagnets arranged around the neck of the tube.
What is the opposite to a cathode?
A cathode is an electrode through which electrical current exits a polarized electrical device. Its opposite is the anode, through which electrical current enters the electrical device. Positively charged ions, called cations, move towards the cathode, while negatively charged ions, called anions, move towards the anode.
How did the cathode's tube experiment lead to the conclusion that atoms contain electrons?
because Thomson saw the ray move from the cathode to the anode so the particles have negatively charge
Why do cathode rays move from the negative end of the tube to the positive end?
Because an electron carries a negative charge and in electricity, opposites attract. Particles with a negative charge will be drawn to the positive charge in the cathode tube.
When will particles move faster?
Molecules move faster when they are heated.add. And of course they may be accelerated by attraction in a Cathode Ray Tube, or a van der Graaf Accelerator.
Does sodium bromide conduct electricity when sold?
Does not, in solid form there are no free ions so can not move towards cathode and anode plates so can not conduct electricity.
If the axis of rotation is near the top of the container will the denser particles tend to move to the top or bottom of the container?
Denser particles would move towards the bottom of the container due to centrifugal force.
Why current flows from cathode to anode in the internal circuit of a simple cell?
generally electrons will move towards positive charge and conventionally current flows in opposite direction to it
How electrons was discovered?
In 1897 J.J.Thomson conducted an experiment in which he took a discharge tube with very less gas molecules in it.When he connected a cathode and an anode, some particles which he called cathode rays passed from the cathode to anode. OBSERVATION: @when a negative and positive plate were kept, the negative plate repelled the rays while the positive one attracted them. This means the ray's particles are negatively charged. @if a paddle wheel was kept in the path of the ray, the wheel started rotating, which means, these particles have energy. @if an object and screen were kept, the shadow of the object fell on the screen after a green glow.This means these particles always move in a straight line. It was then discovered by J.J.Thomson that these particles were electrons!
Why is there a need for microorganisms to move?
Because they need to eat too, be it food particles, nutrients or other organisms. Even if they only photosynthesize, they have to move towards the light!
