Question

An electron in an atom jumps in such a way that its kinetic energy changes from x to $\frac{x}{9}$. The change in its potential energy will be-

• A. $\frac{x}{9}$
• B. $\frac{16x}{9}$
• C. 9x
• D. $\frac{9}{16}$x

Answer 1

Answer: (B)

$\frac{16x}{9}$

Answer 2

K.E. P.E.

(i) x –2x

(ii) $\frac{x}{9}$ – $\frac{2x}{9}$

______________

$- \frac{2x}{9} + 2x = \frac{16x}{9}$