KVPY2011PhysicsElectrostatics
Given below are three schematic graphs of potential energy V ( r ) versus distance r for three atomic particles: electron ( e ⁻ ) , proton ( p ⁺ ) and neutron ( n ) , in the presence of a nucleus at the origin O . The radius of the nucleus is r ₀ . The scale on the V-axis may not be the same for all figures. The correct pairing of each graph with the corresponding atomic particle is -
Options
- A(1, n), (2, p⁺ ), (3, e⁻ )
- B(1, p ⁺ ), (2, e ⁻ ),(3, n )
- C(1, e ⁻ ), (2, p ⁺ ),(3, n )
- D(1, p ⁺ ),(2, n ), (3, e⁻ )
Correct answer
A. (1, n), (2, p⁺ ), (3, e⁻ )
Step-by-step solution
outside the nucleus electric potential decreases e ⁻ is negativity charged its PE is negative even outside the nucleus where nuclear attractive force is negligible (3) e ⁻ outside the nucleus neutron will not experience electric force as it is neutral. So no potential energy associated with it outside nucleus. 1 neutron