Question

Consider an electron $(m=9.1\times {10}^{-31}kg)$ confined by electrical forces to move between two rigid walls separated by $1.0\times {10}^{-9}metre$, which is about five atomic diameter. The quantised energy value for the lowest stationary state is :

• A. $12\times {10}^{-20}J$
• B. $6.0\times {10}^{-20}J$
• C. $6.0\times {10}^{-18}J$
• D. $6J$

Answer 1

The correct option is B $6.0\times {10}^{-20}J$

Hence, option $\left(B\right)$ is correct.