- #1
Alexander2357
- 32
- 0
Homework Statement
An electron is moving at [tex]5.4 \times 10^5 ms^(-1)[/tex] is brought to rest as it enters a region of lower potential. What is the voltage that brought it to rest?
Homework Equations
[tex]\Delta KE=1/2m(v_2)^{2} - 1/2m(v_1)^{2} = W = -\Delta U = q \times \Delta V[/tex]
The Attempt at a Solution
I substituted numbers into the equation and got [tex]\Delta KE = -1.315 \times 10^{-19} J[/tex], then I divided this by [tex]-1.602 \times 10^{-19} C[/tex] and got [tex]0.83 V[/tex] but the answer is wrong according the the answers in the back of the book. Why is this?
Last edited: