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Characteristic Spectrum

The binding e...

Question

The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in an X-rays tube the potential difference V between the cathode and the anti-cathode should be

A

V < 40 k V

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B

V \leq 40 k V

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C

V > 40 k V

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D

V > / < 40 k V

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Solution

The correct option is C $V > 40 k V$
Kinetic energy given by applied voltage must be greater than binding energy.

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