(I) What potential difference is needed to stop an electron that has an initial velocity V...

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(I) What potential difference is needed to stop an electron that has an initial velocity V...

(I) What potential difference is needed to stop an electron that has an initial velocity V =6.0 X 10⁵ m/s?

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Answer 1

Answer #1

The potential energy lost by the electron converts into the form of kinetic energy. From conservation of energy, the expression for total change in energy is,

Here, is electric potential difference, is mass of the electron, is velocity of the electron, and is charge of the electron.

Calculate the electrical potential difference.

Substitute for, for , and for .

Therefore, the electrical potential difference is.

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Answer 2

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