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IceJOKER [234]
2 years ago
10

An electron gun shoots electrons at a metal plate that is 4.0 mm away in a vacuum. The plate is 5.0 V lower in potential than th

e gun. How fast must the electrons be moving as they leave the gun if they are to reach the plate?
Physics
1 answer:
Nadya [2.5K]2 years ago
5 0

The speed of the electron is 1.3 * 10^6 m/s

<h3>What is the velocity?</h3>

We know that when the electron gun is shot, the potential energy of the electron is converted into kinetic energy. The mass of the electron is given as 9.11 * 10^-31 Kg.

The energy of the electron is;

eV = 1e * 5V = ev or 8 * 10^-19 J

Given that E = 1/2mv^2

8 * 10^-19  = 0.5 *  9.11 * 10^-31 * v^2

v = √ 8 * 10^-19/0.5 *  9.11 * 10^-31

v = √1.75 * 10^12

v = 1.3 * 10^6 m/s

Learn ore about speed of electron:brainly.com/question/13130380

#SPJ1

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44.5s ; 22.64 m/s

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