With what speed do the electrons strike the screen? Hint: The kinetic energy of an electron which has been accelerated through a potential difference of 1 V has a kinetic energy equal to 1 eV.

Question

Physics

Tyler Moyer

22 March, 09:30

With what speed do the electrons strike the screen? Hint: The kinetic energy of an electron which has been accelerated through a potential difference of 1 V has a kinetic energy equal to 1 eV.

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Answers (1)

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Camacho · Answer 1

Answer: 3.5 X 10^11 m/s

Explanation:

1 eV is the amount of energy associated with moving one electron through a potential difference of 1 volt.

1 eV = 1.6 x 10-19 J

Mass of electron=9.11 * 10-31

K. E = MV^2/2

V=√ (2K. E/M)

V=3.5 X 10^11