Calculate the voltage required to accelerate a beam of electrons initially at re

Question

Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 2.9 eV .

Calculate their speed if they have a kinetic energy of 2.9 eV .

Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 3.9 keV .

Calculate their speed if they have a kinetic energy of 3.9 keV .

Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 7.0×1016 J .

Calculate their speed if they have a kinetic energy of 7.0×1016 J .

Explanation / Answer

a)voltage(v)=w/q=2.9v

b)v=sqrt(2*k.e/m)=sqrt(2*2.9*1.6*10-19))/9.1*10-31=1*10power6m/s

c)voltage(v)=w/q=3900v

d) v=sqrt(2*k.e/m)=sqrt(2*3.9*1.6*10-19))/9.1*10-31=1.17*10power7m/s

e)voltage(v)=w/q=4375v

f)v=sqrt(2*k.e/m)=sqrt(2*7*10-16))/9.1*10-31=3.8*10power7m/s

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