CBSE Class 12 Physics — Atoms

All previous year questions from Chapter: Atoms

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2026(2 questions)

8
$The 'distance of closest approach' of an alpha-particle is 'd' when it moves with a velocity v head-on towards the target nucleus. If the velocity of alpha particle is halved, the new 'distance of closest approach' will be -$
1 mark· A· $Distance of Closest Approach (Rutherford Scattering)$
16
$Assertion (A): In Bohr model of hydrogen atom, the energy levels are discrete and quantised. Reason (R): In a hydrogen atom, the electrostatic force on the electron provides the necessary centripetal force to it to revolve around the nucleus.$
1 mark· A· $Bohr model — energy quantisation$