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How many states can a vacuum tube have?
2 states
What does it tell you about a vacuum tube if you see the getter of that vacuum tube is no longer silvery but has turned white?
It means that the glass envelope has leaked and is no longer a vacuum. Air inside has oxidized the getter. They generally no longer work in this condition.
What are the Adavantages and disadvantages of vacuum tube?
when the vacuum sucks up things it goes through the tube and into the bag ...Unless you are talking about electronics, then a vacuum tube is used to form an amplifying circuit. Some tubes can emit cathode rays onto a screen (Cathode Ray Tube = CRT) to display a picture and some can function as diodes to regulate current flow.
What does tube mean?
an electron tube containing a near-vacuum that allows the free passage of electric current.
Forward bias and reverse bias?
forward bias is in the direction a junction or vacuum tube wants to conduct currentreverse bias is in the direction a junction or vacuum tube opposes conducting current
What is an electronic vacuum valve with three electrodes?
Triode
When was the three-electrode vacuum tube invented?
In 1907 American inventor Lee De Forest invented the three-electrode vacuum tube
Who invented the three-electrode vacuum tube?
In 1907 American inventor Lee De Forest invented the three-electrode vacuum tube
What computer component did the transistor replace?
the vacuum tube
What is an audion?
An audion was an early variety of electronic amplifying tube consisting of a partially evacuated glass tube with three electrodes, a heated filament, a grid and a plate.
What is a TRIODE and what are its uses?
A triode is a vacuum-tube (US) aka valve(UK) with three electrodes : an anode, a cathode and a grid. The cathode is heated electrically which boils off a cloud of electrons. The anode is made positive ( typ. 100-500V) which attracts the electrons towards it. The grid is an open structure, usually of thin wires, placed between the anode and cathode, but nearer the cathode. If a negative voltage is applied to the grid the current flow through the tube is reduced. The more negative, the less current. Prior to the development of transistors, tubes were used for all things in radio,TV and electronics. Different tubes had different numbers of electrodes; the triode was particularly suited to high power amplifiers, especially at radio frequencies. Triodes are still used today by shortwave radio stations, and for RF heating equipment.
What gas is used in a vacuum tube?
A vacuum tube does not contain any gases. All the gases are evacuated from the tube and only vacuum is left.
What is the third electrode called in a triode thermionic tube?
There are three electrodes: cathode (filament) grid and anode. The "third" will be the one you do not already know the name of.
What are the elements of a vacuum tube?
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
What is in a vacuum tube?
Millman's theorem
Why is not used in three electrodes in batteries?
it will be useless to use 3 electrodes. IT IS WASTE OF MONEY.Two , three or four electrodes can be used but it only increases the rate of reaction.
Where was vacuum tube was made?
who made the vacuum tubes
