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It's basically a highly specialized transformer.
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What is the voltage of a TV picture tube?
We're talking about high voltage when we talk about the operating voltage of a cathode ray tube (CRT). The operating voltage can vary, as you can imagine. Tens of thousands of volts are not uncommon.
Can an electron at rest be set in motion by the magnetic field?
Sure. A charge in a magnetic field experiences a force. A force acting on a mass produces acceleration. Remember the old-style TV sets that were about 6 feet deep from front to back ? That type of picture tube is called a 'CRT', for "cathode-ray tube'. There's a hot wire at the back end of the picture tube that produces a cloud of electrons. The front face of the picture tube has a high positiver voltage on it, to attract the negative electrons to the front. On the way there, the electrons have to go through these magnet coils that are around the neck of the picture tube. The magnetic field inside the neck pulls the stream of electrons left and right, up and down, left and right, and that's how they draw a picture on the front face when they get there.
In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen That voltage is about?
25 thousand volts
Block diagram of computer monitor?
chroma circuit, luminance circuit, picture tube, vertical and horizontal circuits, sync circuit, high voltage circuit, low voltage power supply
Where is the picture tube?
A picture tube is that big glass thing you look at that the picture appears on. The back of it has a regular tube socket.
The average life time of x ray tube?
25000-30000 switching on
Why is your CRT monitor hotter on the top left than on the top right?
The reason that CRT monitors are hotter on the left than on the right is because that is where the high voltage circuitry is located. The picture tube needs maybe around 20 KV to operate. Yes, 20,000 volts or so. There is a flyback transformer and a voltage doubler circuit for the focus control grid in the picture tube.
Is a type of transformer used to generate the high voltage needed for driving a picture tube?
Yes, it is called a fly back transformer.See related links below
What is delta gun picture tube with diagram?
draw delta gun picture tube
Why d hairs of your hand get up after placing it near a TV after TV is switched off?
Excessive STATIC electricity from the high voltage charge used in the picture tube.
Why is it necessary to connect a very high voltage at final anode of a color picture tube?
Electrons striking the phosphors at the front of the picture tube are what generate the photons our eyes see. Electrons (negatively charged) don't move unless forced to by either an electric field or a magnetic field - in this case an electric field - created by the circuitry in the TV. The distance from the back of the picture tube neck where electrons are generated (the cathode, negative charge, repels electrons) to the front of the screen where they are needed is large, perhaps 20 or 30 or more inches. Though the picture tube is evacuated, it is not a perfect vacuum and many atoms still exist inside it, which results in resistance to electron flow. Ohm's Law - Voltage = Current x Resistance - determines what happens electrically. Since the resistance of the atoms inside the tube is quite high to electrons, a high voltage is required to overcome it and force the electrons to move and strike the screen in sufficient quantity (current), after which they fall back to the metal coating inside the picture tube (the anode, positive charge, attracts electrons), completing the circuit that started at the cathode. A lower voltage will simply not provide enough force to do the job.
What are the old tv's with the big back on them?
Those were picture-tube TVs. The picture tube was almost as long as the TV screen was wide.
