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The total energy of electron in an atom ...

The total energy of electron in an atom is a combination of potential energy and kinetic energy. If total energy is `-E` for an electron in an atom, then its K.E. and P.E. respectively are 

A

2E, -E

B

2E, E

C

E, -2E

D

E, -E

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The correct Answer is:
C
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