An electron is accelerated from rest through a potential difference of 450 V.What is its final speed?

Question

Quizplus · Accepted Answer

The final speed of an electron accelerated through a potential difference can be found using the equation $v = \sqrt{\frac{2eV}{m}}$, where $e$ is the charge of the electron (approximately $1.6 \times 10^{-19} C$), $V$ is the potential difference (450 V in this case), and $m$ is the mass of the electron (approximately $9.11 \times 10^{-31} kg$). Plugging in these values, the calculation yields a speed close to $1.3 \times 10^7 m/s$, which corresponds to choice B.

An Electron Is Accelerated from Rest Through a Potential Difference