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Q.

Identify the graph depicting the variation of the de-Broglie wavelength λ of an electron with its
kinetic energy K. [Kerala CEE 2013]

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a

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b

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c

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d

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answer is A.

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Detailed Solution

de-Broglie wavelength is given by

λ=hp   and hp1K

So,    λ1K or λK= constant 

Hence, the graph between λ and K will be a curved line.

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