Define an electron volt. Express it in terms of joule. - Vidyadip

Question

Define an electron volt. Express it in terms of joule.

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Answer

Electron Volt. Electron volt is the amount of energy possessed by an electron in falling through a potential difference of 1 volt.
m = 4Kg, u = 0,
F = 16N, t = 10 Sec
F = ma, 16 = 4a, a = 4 m/ s²
V = u + at = 0 + 4 (10)
V = 40m/ s
K.E. of the body at end of 10 sec.
$\text{E}=\frac{1}{2}\text{mv}^2$
$=\frac{1}{2}\times4\times(40)^2$
$=3200\text{J}$

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