NCERT · Class 12 · Physics · AtomsThe distance of closest approach of an alpha particle to the nucleus of atomic number Z is given by which proportional relationship?
Step-by-Step Solution
The distance of closest approach (r_0) is obtained by equating the kinetic energy of the alpha particle to the electrostatic potential energy at that distance, which gives r_0 proportional to 1/E (where E is kinetic energy) and directly proportional to Z.
Detailed Options Breakdown
Option : Proportional to the kinetic energy E
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms.
Option 1: Inversely proportional to the atomic number Z
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms.
Option 2: Inversely proportional to the kinetic energy E (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 3: Independent of the atomic number Z
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Atoms.
💡 Study Guide: This question tests core syllabus concepts from Atoms. For formulas, key summaries, and mock exam reference guides, read the full Atoms Revision Notes.