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

Hubble constant, Hubble constant; H0 (E.P. Hubble; 1925): The constant...

Hubble constant; H0 (E.P. Hubble; 1925): The constant that determines the relationship among the distance to a galaxy and its velocity of recession because of the expansion of

Explain the prisms, Explain the Prisms, Dispersion and Color A ray of whi...

Explain the Prisms, Dispersion and Color A ray of white light that passes through a prism is dispersed into the visible spectrum. Red light is refracted the least, and purple lig

How thickness of depletion layer in a p-n junction changes, Explain, with t...

Explain, with the help of a circuit diagram, how the thickness of depletion layer in a p-n junction diode alters when it is forward biased. In the following circuits which one of t

Magnetic field and electric current., the magnetic field at a dictance of 2...

the magnetic field at a dictance of 2cm from the axis of a straight conductor carrying current is 12mT.Find the currentin the conductor?

State pressure law, "The pressure of a needed mass of gas at constant volum...

"The pressure of a needed mass of gas at constant volume differs directly as its Kelvin Temperature",

Explain nuclear reaction, The method by which the identity of a nucleus is ...

The method by which the identity of a nucleus is changed when it is bombarded by an energetic particle is known as nuclear function. The general relation for the nuclear reaction i

Determine the angle of the prism, A ray of light travelling in air is incid...

A ray of light travelling in air is incident on a prism and passes through it with a speed of 2X10 8 ms -1 parallel to its base. If the angle of refraction is similar to half of

How the neutron to proton ratio changes during alpha-decay, Describe, with ...

Describe, with the help of a nuclear reaction in each of the following cases, how the neutron to proton ratio alters during (i) alpha-decay (ii) beta-decay?

Explain resolving power of an astronomical telescope, Explain the term 'res...

Explain the term 'resolving power' of an astronomical telescope. How does it get affected on 1. Enhancing the aperture of the objective lens? 2. Enhancing the wavelength of t

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