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Potential Energy of a Point Charge Placed at a Point with Non Zero Potential

Kinetic energ...

Question

Kinetic energy of a moving electron is doubled by applying a potential difference of V. Its de Broglie wavelength changes by a factor of

A

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B

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C

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D

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Solution

The correct option is A

$λ = \frac{h}{p} = \frac{h}{\sqrt{2} m K}$

If K.E is doubled, $λ ‘ = \frac{λ}{\sqrt{2}}$

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