An electron is accelerated through a potential difference of V volts. The speed of electrons will be

Question

An electron is accelerated through a potential difference of V volts. The speed of electrons will be (A)  √(eV/m)  (B)  √(2eV/m)  (C)  √(eV/2m)  (D)  √(m/2eV)

Tardigrade Admin · Accepted Answer

If v is the velocity attained by electron, then (1/2) m v2=e V v=√(2 e V/m)

Q. An electron is accelerated through a potential difference of $V$ volts. The speed of electrons will be

$\frac{e V}{m}$

$\frac{2 e V}{m}$

$\frac{e V}{2 m}$

$\frac{m}{2 e V}$

If $v$ is the velocity attained by electron, then
$\frac{1}{2} m v^{2} = e V$
$v = \frac{2 e V}{m}$

Q. An electron is accelerated through a potential difference of V volts. The speed of electrons will be

meV​​

m2eV​​

2meV​​

2eVm​​