Physics-
General
Easy
Question
The kinetic energy of an electron revolving around a nucleus will be
- Four times of P.E.
- Double of P.E.
- Equal to P.E.
- Half of its P.E.
The correct answer is: Half of its P.E.
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The following diagram indicates the energy levels of a certain atom when the system moves from 2E level to E, a photon of wavelength 
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