An electron with an initial speed of 500,000 m/s is brought to rest by an electr
ID: 1485714 • Letter: A
Question
An electron with an initial speed of 500,000 m/s is brought to rest by an electric field.
Did the electron move into a region of higher potential or lower potential?
Did the electron move into a region of higher potential or lower potential?
D-Because the electron is a negative charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential.
What was the potential difference that stopped the electron?
V =?
What was the initial kinetic energy of the electron, in electron volts?
A- Because the electron is a negative charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential. B-Because the electron is a positive charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential. C-Because the electron is a positive charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential.D-Because the electron is a negative charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential.
What was the potential difference that stopped the electron?
V =?
What was the initial kinetic energy of the electron, in electron volts?
Explanation / Answer
Electric field must oppose he elctron motion
Electron has negativce charge and hence it must move from high potential to lower potential
Answer:
A- Because the electron is a negative charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential.
-------------------------------------------------------------------------------
KE = 0.5*m*v^2
= 0.5*(9.1*10^-31 Kg) * (500000 m/s)^2
= 1.1375*10^-19 J
= 1.1375*10^-19 / (1.6*10^-19) eV
= 0.71 eV
V = 0.71 V
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.