answersLogoWhite

0

A vacuum tube is an instrument used to control the flow of electrons. The simplest form of this is called the triode and has three elements. An anode, a cathode, and a grid. The flow of electrons is always from anode to cathode the grid can influence the flow of the electrons. Like the light bulb the tube needs to be a vacuum or filled with gas to prevent the metals they are made of from catching on fire and melting.

The first person to discover that a grid could have an electric charge was Lee De Forest.

See also:

Lee De Forest

Edwin Armstrong

David Sarnoff

User Avatar

Wiki User

16y ago

What else can I help you with?

Related Questions

What is a vaccume tube?

It's an electronic component, a predecessor to the transistor. It looks a little like a lightbulb, but with more wires in the capsule.


Why is outterspace a vaccume?

because theres no gravity


What is 3.08x10 to the 6?

speed of light in a vaccume


Why does a 1995 s10 blazer shut off when brakes are pressed?

Is your brake pedal hard ? If so replace the power brake booster. It sounds like you have a major vaccume leak in the booster when you apply the brakes. Power brakes work off of engine vaccume. If the dieafram is leaking vaccume when you apply the brakes it leans the engine out. ( creates a major vaccume leak ) and engine dies. Hope this helps.


Do'es the 1995 silverado 5.7 have vaccume advance?

No it does not.


Why does the air conditioner in a 1993 Grand Prix blow at the top and bottom but not at the vents on the dash?

Probably because U have a VACCUME Leak @ the In take Manifold where the Vaccume hose connects That goes 2 the vaccume modulator.butt sometimes it's just a collapsed vaccume hose. Usally it's ok @ an idle butt goes 2 the Windshield when U accelerate.L00k @ the actuater door hoses under the dash if all else is OK.-----Marv


How do you clean my system unit?

with the help of vaccume cleaner and Brush.


How do you vacuum on little alchemy?

i think that is smoke+metal=vaccume


Mechanical device used for cleaning carpet?

Vaccume Cleaner


Dead fish in vaccume clogged plunger not working?

This happened to my hamster once


Why do you hear escaping air when you apply your brakes?

The power brake booster is leaking vaccume.


1993 dodge shadow es 2 point 5 runs rich and rough replaced oh two sensor plugs dist cap also cleaned out cat converter Still runs rich rough What next?

Need to check the map senser first and be sure the vaccume hose that hooks to it is not leaking vaccume. Then with engine running unplug the hose from senser and make sure there is vaccume on the hose. You should also check the fuel pressure regerlator by removing the vaccume hose that hooks to it while the engine is running, the engine should speed up if not then replace fuel reg.