Question

An electron in an atom Undergoes transition in such a way that its kinetic energy changes from x to $\frac{x}{4}$, the change in potential energy will be

• A. $+\frac{3}{2}x$
• B. $\frac{-3}{8}x$
• C. $\frac{+3}{4}x$
• D. $\frac{-3}{4}x$

Answer 1

The correct option is A $+\frac{3}{2}x$

PE = -2KE
$\therefore$ PE will change from -2x to $\frac{-2x}{4}$
Change in potential energy $=\frac{-2x}{4}-(-2x)$
$=\frac{-x}{2}+2x=\frac{3x}{2}$