Q126 / 180 · NEET 2019 (All India) · Physics

The total energy of an electron in an atom in an orbit is $- 3.4 e V .$ Its kinetic and potential energies are, respectively,

A
$- 3.4 e V, - 3.4 e V$
B
$- 3.4 e V, - 6.8 e V$
Correct answer
C
$3.4 e V, - 6.8 e V$
D
$3.4 e V, 3.4 e V$

Solution

K E = - T E

\Rightarrow K E = 3.4 e V

P E = 2 \cdot T E = - 6.8 e V

Hence, the correct answer is option: 'C'.

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