Home Physics Electron, Photon, Photoelectric Effect and X-rays X - Rays When the accelerating voltage applied on the…
Physics Electron, Photon, Photoelectric Effect and X-rays X - Rays MCQ (Single Correct)

When the accelerating voltage applied on the electrons increased beyond a critical value

A
Only the intensity of the various wavelengths is increased
B
Only the wavelength of characteristic relation is affected
C
The spectrum of white radiation is unaffected
D
The intensities of characteristic lines relative to the white spectrum are increased but there is no change in their wavelength

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Text Solution

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The correct answer is:
D

On increasing the applied voltage across the tube the electrons which knock out the orbiting electrons will left over with extra energy and these may knock out more orbit in electrons in the target which leads to emission of more characteristic X-rays.

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