Question
Which change would directly cause the minimum
wavelength in X-ray emission to decrease?Solution
The minimum wavelength in X-ray emission corresponds to the maximum energy of emitted X-rays, which depends directly on the kinetic energy of the incident electrons . This kinetic energy is determined by the accelerating potential (V) applied across the X-ray tube. The relation is: 
So, increasing the accelerating potential increases the maximum energy, thereby decreasing the minimum wavelength of emitted X-rays.
What will come in place of the question mark (?) in the following series?
2, 5, 14, 41, 122, 365, ?
64, 32, ? , 48, 96, 240
10, 20, 60, 300, ?, 23100
3, 5, 12, 38, 154, ?
120, 120, ?, 360, 900, 2700
12    17    44    147    ?   3065   18420
...827, 820, 806, 785, 757, ?
58     69      56       ?      54       73
...12, 19, 33, ?, 117
251, 130, 274, ?, 301, 76Â
Relevant for Exams:
