First slide

X-rays

Question

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?

Easy

A

10 kV
B

20 kV
C

30 kV
D

40 kV

Solution

$λ_{min} = \frac{h c}{{eV}_{max}} \Rightarrow H i g h e r t h e V_{max}, L o w e r t h e λ_{min}$

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