An electron beam accelerated from rest through a potential difference of $$5000$$ V in vacuum is allowed to impinge on a surface normally. The incident current is $$50$$μA and if the electrons come to rest on striking the surface, the force on it is

Question

Infinity Learn · Accepted Answer

Energy $$=12mv2=5000eV=5000$$×$$1.6$$×$$10$$−$$19$$ joule $$mv=2$$×$$5000$$×$$1.6$$×$$10$$−$$19m=4$$×$$10$$−$$8m=n=qe=Ite=50$$×$$10$$−$$6$$×$$11.6$$×$$10$$−$$19=31.25$$×$$1013Force$$ $$=$$ change of momentum per $$second=nmv=31.25$$×$$1013$$×$$4$$×$$10-8m$$ $$=1.1924$$×$$10-8N$$

An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 50 $μ$ A and if the electrons come to rest on striking the surface, the force on it is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 50μA and if the electrons come to rest on striking the surface, the force on it is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

An electron beam accelerated from rest through a potential difference of 5000 V in vacuum is allowed to impinge on a surface normally. The incident current is 50 $μ$ A and if the electrons come to rest on striking the surface, the force on it is