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Sagot :
The potential difference that stopped electron is 1.422v
potential difference in between two points is the amount of work done is moving a unit charge from one point to another point.
The mass of the electron,
m = 9.109*10⁻³¹
Va (initial speed) = 500,000 m/s
Vb (final speed) = 0 m/s
Electron has been stopped because the electrons move from higher potential to lower potential.
by the work energy theorem
W = ½ mv² (1 equation)
The Potential difference is
W = eV
V = W/e
put the value of W form equation 1.
[tex]V = \frac{\frac{1}{2} (V_{b} ^{2} - V_{a} ^{2} )}{e}[/tex]
e = 9.109*10⁻³¹
V = 1/2 [(500000m/s²) - 0m/s² ] / 9.109*10⁻³¹
V = 1.422v
The potential difference that stopped electron is 1.422v
To know more about potential difference.
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