Electrons, thermionically emitted from a cathode in a vacuum valve, travel across a potential difference of 1000V to the anode. What is the velocity of the electrons as a fraction of the velocity of light, c, when they reach the anode?

Electrons, thermionically emitted from a cathode in a vacuum valve, travel across a potential difference of 1000V to the anode. What is the velocity of the electrons as a fraction of the velocity of light, c, when they reach the anode?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter29: Introduction To Quantum Physics

Section: Chapter Questions

Problem 62PE: (a) If the position of an electron in a membrane is measured to an accuracy of 1.00 m, what is the...

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Question

Electrons, thermionically emitted from a cathode in a vacuum valve, travel across a potential difference of 1000V to the anode.
What is the velocity of the electrons as a fraction of the velocity of light, c, when they reach the anode?
Select one:
а.
0.004c
b. 0.13c
С.
0.063c
d. 0.02c

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