emission current वाक्य
उदाहरण वाक्य
मोबाइल
- In this case, the electron gun acceleration potential limits the emission current.
- After flashing the emission current is high but unstable.
- The emission current density " J " varies from position to position across the emitter surface.
- In this case, the emission current is regulated by the thermionic emission process, given by the Richardson Dushman equation.
- The thermionic emission current density, J, rises rapidly with increasing temperature, releasing a significant number of electrons into the vacuum near the surface.
- The emission current as given above is many times greater than that normally collected by the electrodes, except in some pulsed valves such as the cavity magnetron.
- The total emission current " i " from a defined part of the emitter is obtained by integrating " J " across this part.
- In 1926, Rother, using a still newer platform galvanometer of sensitivity 26 pA, measured the field emission currents in a " hard " vacuum between closely spaced electrodes.
- The solution was to add another grid between the screen grid and the main anode, called the suppressor grid ( since it suppressed secondary emission current toward the screen grid ).
- For practical emitters, the emission current density used in Fowler-Nordheim-type equations is always the current density at some reference point ( though this is usually not stated ).
- There are also emission regimes where the internal electrons are not in thermodynamic equilibrium and the emission current is, partly or completely, determined by the supply of electrons to the emitting region.
- The emission current varies strongly with the local work function in accordance with the Fowler-Nordheim equation; hence, the FEM image displays the projected work function map of the emitter surface.
- The surface property of primary interest is the work function, which is the barrier that limits electron emission current from the surface and essentially is the heat of vaporization of electrons from the surface.
- Experiments measure the emission current " i " from some defined part of the emission surface, as a function of the voltage " V " applied to some counter-electrode.
- Where voltage-drop effects occur, then the theory of the emission current may, to a greater or lesser extent, become theory that involves internal transport effects, and may become very complex.
- Simple solvable models of the tunneling barrier lead to equations ( including the original 1928 Fowler Nordheim-type equation ) that get predictions of emission current density too low by a factor of 100 or more.
- In 1911 and then 1914, then-graduate student Franz Rother, employing Earhart's method for controlling and measuring the electrode separation but with a sensitive platform galvanometer, directly measured steady field emission currents.
- For CFE, basic theoretical treatments provide a relationship between the local emission current density " J " and the local barrier field " F ", at a local position on the emitting surface.
- At the time of writing, the most promising forms of large-area field emission source ( certainly in terms of achieved average emission current density ) seem to be Spindt arrays and the various forms of source based on CNTs.
- Photoemission can occur from any material, but it is most easily observable from metals or other conductors because the process produces a charge imbalance, and if this charge imbalance is not neutralized by current flow ( enabled by conductivity ), the potential barrier to emission increases until the emission current ceases.
- अधिक वाक्य: 1 2
emission current sentences in Hindi. What are the example sentences for emission current? emission current English meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.