Modern Physics 4 Question 31
32. When the number of electrons striking the anode of an X-ray tube is increased the of the emitted X-rays increases, while when the speeds of the electrons striking the anode are increased the cut-off wavelength of the emitted X-rays
(1986, 2M)
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Solution:
- Cut-off wavelength is given by
with increase in applied voltage
Further, with increase in number of electrons striking the anode more number of photons of X-rays will be emitted. Therefore, intensity of X-rays will increase.
