Valve & digital electronics: thermionic emission, Physics

Assignment Help:

(i) The procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are known as thermions and current flowing is known as thermion current.

(ii)Thermions have dissimilar velocities.

(iii)This was discovered by Edison

 


Related Discussions:- Valve & digital electronics: thermionic emission

Demerits of vacuum diode over semiconductor diode, Demerits of Vacuum Diode...

Demerits of Vacuum Diode over Semiconductor Diode (i)  Bigger in size (ii)  Less efficiency (iii)  Expensive

1 coulumb charges, 1 Coulumb Charges: 1 coulumb charge is that amount o...

1 Coulumb Charges: 1 coulumb charge is that amount of charge which when placed 1 m from an identical charge in vacuum which repels it with a force of 8.99 × 109 N.

Determine the gradient, Determine q, q = ax2¬- 2by + c2z2 where a, b and ...

Determine q, q = ax2¬- 2by + c2z2 where a, b and are c are constant at (1, -2, 3)

Maximum longitudinal displacement amplitude, A bar of length l is clamped a...

A bar of length l is clamped at x=0 and loaded with a mass mat x=l.(a) apply these boundary conditions to equation x=A e^(wt+kx)+Be^(wt- kx) and thereby determine an equation from

Explain about the total internal reflection, Explain about the total intern...

Explain about the total internal reflection. Total internal reflection: While light is incident onto a medium of lesser index of refraction, ray is bent ahead of the norma

How many pounds does one gallon of water weigh, How many pounds does one ga...

How many pounds does one gallon of water weigh One wine calculates or US gallon of water weighs 8.34 pounds. An Imperial Gallon is ten pounds of water at 62F and 30 inches of

Expermient of a tin can charcoal burner, A tin can charcoal burner A la...

A tin can charcoal burner A large tin can at least 10 cm in diameter should be use. About 4 cm from the bottom mark off triangular windows around the can, as shown in the diagr

Recent trends in super conductors, Super conductivity has long been a stapl...

Super conductivity has long been a staple of science fiction one of the first mentions of the phenomenon occurred in Robert A Heinlein’s novel “Beyond this Horizon (1942)”. Notably

Which phrase would be incorrect to use, Which phrase would be incorrect to ...

Which phrase would be incorrect to use: (1)A molecular of a compound  (2)A molecule of an element (3)An atom of an element (4)None of these Ans:  (2)A molecule of a

Dimensional analysis, if the universal gravitational force depends on the p...

if the universal gravitational force depends on the product of the masses and depends on the distance between the masses ,find an expression for the universal force, and the unit f

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd