The mass of an electron is $m$ , its charge $e$ , and it is accelerated from rest through a potential difference $V$ . The velocity of electron will be calculated by formula:

\sqrt{V / m}

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\sqrt{e V / m}

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\sqrt{(2 e V / m)}

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None of these

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Solution

The correct option is C $\sqrt{(2 e V / m)}$
We know that-
$K i n e t i c e n e r g y = \frac{1}{2} m v^{2} = e V$

$v = \sqrt{(2 e V / m)}$

Hence, option (C) is correct.

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The mass of an electron is m, its charge e, and it is accelerated from rest through a potential difference V. The velocity of electron will be calculated by formula:

The correct option is C √(2eV/m)We know that-Kinetic energy=12mv2=eVv=√(2eV/m)Hence, option (C) is correct.

The mass of an electron is $m$ , its charge $e$ , and it is accelerated from rest through a potential difference $V$ . The velocity of electron will be calculated by formula:

The correct option is C $\sqrt{(2 e V / m)}$
We know that-
$K i n e t i c e n e r g y = \frac{1}{2} m v^{2} = e V$

$v = \sqrt{(2 e V / m)}$

Hence, option (C) is correct.