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Q.

A beam of electron accelerated by a large potential difference V is made to strike a metal target to produce X-rays. For which of the following values of V, will the resulting X-rays have the lowest minimum wavelength?

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a

10 kV

b

20 kV

c

30 kV

d

40 kV

answer is D.

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Detailed Solution

λmin=hceVmax ⇒Higher the Vmax , Lower the λmin
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A beam of electron accelerated by a large potential difference V is made to strike a metal target to produce X-rays. For which of the following values of V, will the resulting X-rays have the lowest minimum wavelength?