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Question

An electron beam is accelerated by a potential difference V to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If λmin is the smallest possible wavelength of X-rays in the spectrum, the variation of logλmin with log V is correctly represented in

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 B
For X- rays,

eV=hcλmin

Taking log on both sides,

log e+log V=log hclog λmin

log V=log λmin+constant

So option b is correct answer.

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