0
That bright red color is heat: infrared energy and visible light. The electrons gain kinetic energy as they accelerate away from the Cathode. As each electron is absorbed into the metal Plate, its kinetic energy becomes acoustic motion in the Plate's atoms - heat. (The plate is being hammered.)
It is not normal for vacuum tube circuits to operate at high Plate temperatures that are this conspicuous. This circuit has an excessive product of Plate voltage times Plate current, and/or the vacuum tube Grids are biased incorrectly.
One common technique for reducing this heating effect is to use a second Grid near the Plate that is biased much more positive than the Plate. This causes the electrons to decelerate between Grid 2 and the Plate - loosing most of their kinetic energy before absorbtion.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoExcessive power dissipation, if there is too much voltage and/or current on the plate. A vacuum tube has it maximum dissipation specified in data, and glows red if that is exceeded.
Add your answer:
Earn +20 pts
Does the tube light glow with out starter and choke?
it will not glow
Why does the glow of two lamps decrease when they are connected in series?
Because the total current is divided between the two components. For example, if the current was one amp, and you connected two bulbs in series, ech bulb would get half an amp of current. As brightness is proportional to current, this means they glow more dimly.
Connected in series or parallel will each bulb glow brighter?
In parallel, each bulb will have full voltage applied across them. However, in series, the voltage across each bulb won't be the same as supply voltage. Thereby, bulbs connected in parallel will glow brighter.
Are bulbs brighter in a series or parallel curcuit?
Batteries in series makes the voltage additive. If the bulb is only rated at a specific voltage and you double the voltage the bulb will glow brighter but its life span will be shortened. Batteries in parallel will keep the voltage at the same level as a single battery but the endurance drain of the batteries will be doubled. Example, if a battery is drained of power, with a bulb being left on continuously, in one hour then two batteries in parallel would allow the bulb to glow for two hours before the batteries were drained of power.
How do you test for a digital signal?
using LED.when the signal is 1,then the LED glows,but when signal is 0,then it does not glow.
What element when lit causes a bright white glow?
Neon has a bright, white glow when it has been lit. Plutonium also has a bright glow, due to its reaction with oxygen.
Which gas is filled in electric tubes to give bright glow?
A standard tungsten-element light bulb, there is no gas under the glass, it is a vacuum.
Which of the following would decrease the amount of time of a glow stick to stay bright?
increase the temparature of the reactants
What happens when you boil a glow stick?
it would take all the energy out of the glowstick and no it will not make it bright dont do it
To glow or be bright by reflecting light?
sunshine
What is a neon glow tester?
Neon is a very bright colour!
If a glow stick has gone out and you put it in the refrigerator will it glow again?
Yes it will. All you have to do is keep it in the freezer for about an hour, then crack it again and it'll begin to glow. It will not glow as bright as it did the first time though.
What do you call the bright things that people wear in the dark?
glow in the dark
Why would your 87 gt exhaust manifolds glow red after a few mins of run time?
the timing is incorrect on your engine, to glow bright red the timing is to far advanced. have the timing reset and you will be good to go.
Can a glow stick glow work if you freeze them?
Yes but not forever. It will not be as bright or illuminous. The fridge however will slow the dimming down. COOLIES
Does neon glow in the dark?
Neon does not glow in the dark but it does glow in black light or UV light. Because neon colors are so bright when illuminated with light, it gives the appearance that neon colors would glow in the dark.No, it is a colourless gas but it will glow red if you pass an electrical current through it.Neon is also another way of describing brightly coloured things, but they don't glow in the dark either.
What element produces a bright yellow glow in street lights?
it is the element Argon
