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

Question

A) Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 4.5eV.

B) Calculate their speed if they have a kinetic energy of 4.5eV.

C) Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 4.7keV.

D) Calculate their speed if they have a kinetic energy of 4.7keV.

E) Calculate the voltage required to accelerate a beam of electrons initially at rest if they have a kinetic energy of 7.0

Explanation / Answer

A) Voltage required = 4.5 volt

B)m v^2/2 = 4.5 eV

=> 9*1.6 *10^-19 /( 9 *10^-31 ) = V^2

=>V= 1.25 * 10^6 m/s

C)4.7 V

D)V= 1.285 *10^6

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