IIT JEE , AIEEE Forum - Physics , Modern Physics

wnnaiit

Q.4 When voltage applied to X-ray tube is increasedd from 10kVto 20kV the wavelength interval b/w the K alpha line & 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 29

Q5 If neutrons exert only attravtive force why don,t we have a nucleus containing neutrons only?

Q6 for size redn nucleus takes help of alpha decay why not proton or any other nucleus?

sagar90

Neutrons play an important role in the stability of a nucleus.
In the nucleus, two neighboring protons repel each other with an electrical force that is 100 million times stronger than the electrical attraction that binds the electrons around the positively charged nucleus.
Protons and neutrons are bound together by the strong nuclear force. Certain combinations of neutrons and protons bind together especially tightly. An example is the helium nucleus, also called an alpha particle, which contains two protons and two neutrons.

wnnaiit

sorry sagar i couldn't understand your reply

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