QJEEM15Phddb2: JEE Main 2015 Physics - Class 12 JEEM15Phddb2 Solution: As an electron makes a transition from an excited state to the…

Question

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As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom/ion :

A kinetic energy decreases, potential energy increases but total energy remains same
B kinetic energy and total energy decrease but potential energy increases
C its kinetic energy increases but potential energy and total energy decrease
D kinetic energy, potential energy and total energy decrease

Accepted Answer

U = - K \frac{z e^{2}}{r}; T . E = \frac{k}{2} \frac{z e^{2}}{r}

K . E = \frac{k}{2} \frac{z e^{2}}{r} .

Here

r

decreases

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