uncertainity principle

Questions based on Derivation of energy of electron| Spectrum of hydrogen likes species and drawbacks of Bohr's model of Atom| Wave nature of particles and de-brogile hypothesis| Heisenberg's uncertainity principle and wave mechanical model of Atom

Given below are two statements : Statement I : Rutherfods's gold foil experiment cannot explain the line spectrum of hydrogen atom. Statement II : Bohr's model of hydrogen atom contradicts Heisenberg's uncertainity principle. In the light of the above statements, choose the most appropriate answr from the options given below :

Assuming Heisenberg Uncertainity Principle to be true what could be the miniumum uncertainity in de–Broglie wavelength of a moving electron accelerated by Potential Difference of 6V whose uncertainity in position is 7/22 n.m.

Human development is based on certain principles. Which of the following is not a principle of human development?

For a ball of mass 198.6 g to be located within 0.1 "Å" , what will be the minimum uncertainity in velocity ?