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Characteristic Spectrum

In a TV tube,...

Question

In a TV tube, the electron are accelerated by a potential difference of 10 kV. Then, their de-Broglie wavelength is nearly:

A

1.2 ˚ A

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B

0.12 ˚ A

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C

12 ˚ A

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D

0.01 ˚ A

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Solution

The correct option is B $0.12 ˚ A$

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