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An electron moves along the trajectory i to position f in Fig Q21.5

a) Does the electric potential energy increase, decrease, or stay the same?

b) Is the speed of the electron at f greater than, equal to or less than that in i?

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26 Sep 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

An electron (q=-e) possesses a charge of  Q=+3e and it moves in a circular path in an orbit completing half of its radius r around a nucleus.

a. Calculate the amount of work done on the electron as it moves in the circular path from i to f (half of the circle). Justify your answer.

b. Calculate the change in electric potential energy change as the electron moves from i to f?

c. Measure the electron's speed at f (greater than, less than, or equal to its speed at i).

 

 

 

An electron is released from rest in a region of space with a nonzero electric field.

1. As the electron moves, does the electric potential energy of the system increase, decrease, or stay the same?
 
a. increase
b. decrease
c. stay the same

2. Choose the best explanation from among the following.

a. As the electron begins to move, its kinetic energy increases. The increase in kinetic energy is equal to the decrease in the electric potential energy of the system.
b. Because the electron has a negative charge its electric potential energy doesn't decrease, as one might expect, but increases instead.
c. The electron will move perpendicular to the electric field, and hence its electric potential energy will remain the same.

An electron (q=-e) complete half of its circular orbit of radius r around a nucleus with Q=+3e.

(a) How much work is done on electron as it moves from i to f.

(b) By how much does the potential energy of the electron changes as it moves from i to f.

(c) Is electron's speed at f greater, less than, or equal to the speed at i.

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