An electron microscope use a beam of electrons instead visible light as source of illumination.
Because the cathode is connected to an external source of power, from which electrons are continuously supplied to the cathode.
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Zero. Electrons are not delivered to homes. The source of electrons that provide energy in homes is actually the electrical conductor itself.
The cathode ray tube (CRT) is an evacuated glass envelope containing an electron gun (a source of electrons) and a fluorescent screen, usually with internal or external means to accelerate and deflect the electrons. When electrons strike the fluorescent screen, light is emitted. Source: Copied from Wikipedia
Main fuel is glucose. It is oxidized using oxygen
Electron transport is electricity. Electricity is the flowing of electrons along a substrate such as copper. Electrons will move from one source to another source. In household electricity the electrons travel along the path and back to the original source.
Water (H2O) is the source.
H20
The electrons are always there, for example in the metal. You don't need a special "source" for electrons in a circuit. What you DO need is a voltage source, i.e., something that pushes the electrons around.
An electrical circuit is a path which electrons from a current source flow. Electric current flows in a closed path called an electric circuit. The point where those electrons enter an electrical circuit is called the "source" of electrons. The point where the electrons leave an electrical circuit is called the "return". The exit point is called the "return" because electrons always end up at the source when they complete the path of an electrical circuit. The part of an electrical circuit that is between the electrons' starting point and the point where they return to the source is called an electrical circuit's "load". ---Nerd
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An electron microscope use a beam of electrons instead visible light as source of illumination.
The cathode of an electron gun.
A Battery
a wire assumed to be at ground
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