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Q.4 When voltage applied to X-ray tube is increasedd from 10kVto 20kV the wavelength interval b/w the Kalphaline & the short wave cutoff of cts X-ray spectrum increasd by a factor of 3.Find the element of which target of tube id made(R=107m-1 )ans 29Q5 If neutrons exert only attravtive force why don,t we have a nucleus containing neutrons only?Q6 for size redn nucleus takes help ofalpha decay why not proton or any other nucleus?

Aditi Chauhan , 11 Years ago
Grade 10
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