1.

An X ray tube is operated at 50kV, the maximum wavelength produced is……..A.

Answer»

0.75
0.25
1
2.5

Solution :`lamda_(min)=(HC)/(Ve)=(6.625 times 10^-34 times 3 times 10^8)/(50 times 10^3 times 1.6 times 10^-19)`
`=2.48 times 10^-11`
`=0.25 times 10^-10 m=0.25 A`
In the present question, it should be minimum INSTEAD of MAXIMUM. Moreover, this TOPIC is out of present syllabus.


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