4. An electron has an initial velocity of 3.6x104 m/s to the right. It then travels through a potential difference, which speeds the electron up to a velocity of 8.1x104 m/s to the right. a. Since the particle was traveling to the right, and sped up, what was the direction of the acceleration of the electron, left or right? b. What then must have been the direction of the force on the electron? c. And then what must have been the direction of the electric field in that area? d. Given that you know the electric field has to point from high potential to low potential, is the electron traveling from a low to a high potential, or is it traveling from a high to a low potential? e. Does that make the potential difference (the change in potential) positive, or negative?

Physics for Scientists and Engineers: Foundations and Connections
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Chapter39: Relativity
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An electron has an initial velocity of 3.6x104 m/s to the right.  It then travels through a potential difference, which speeds the electron up to a velocity of 8.1x104 m/s to the right.

a) Since the particle was traveling to the right, and sped up, what was the direction of the acceleration of the electron, left or right?

b) What then must have been the direction of the force on the electron?

c) And then what must have been the direction of the electric field in that area?

d) Given that you know the electric field has to point from high potential to low potential, is the electron traveling from a low to a high potential, or is it traveling from a high to a low potential?

e) Does that make the potential difference (the change in potential) positive, or negative?

4. An electron has an initial velocity of 3.6x104 m/s to the right. It then travels through a potential difference,
which speeds the electron up to a velocity of 8.1x104 m/s to the right.
a. Since the particle was traveling to the right, and sped up, what was the direction of the acceleration of the
electron, left or right?
b. What then must have been the direction of the force on the electron?
c. And then what must have been the direction of the electric field in that area?
d. Given that you know the electric field has to point from high potential to low potential, is the electron
traveling from a low to a high potential, or is it traveling from a high to a low potential?
e. Does that make the potential difference (the change in potential) positive, or negative?
Transcribed Image Text:4. An electron has an initial velocity of 3.6x104 m/s to the right. It then travels through a potential difference, which speeds the electron up to a velocity of 8.1x104 m/s to the right. a. Since the particle was traveling to the right, and sped up, what was the direction of the acceleration of the electron, left or right? b. What then must have been the direction of the force on the electron? c. And then what must have been the direction of the electric field in that area? d. Given that you know the electric field has to point from high potential to low potential, is the electron traveling from a low to a high potential, or is it traveling from a high to a low potential? e. Does that make the potential difference (the change in potential) positive, or negative?
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