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H-परमाणु की प्रथम कक्षा में एक इलेक्ट्रॉन की ऊर्जा -1.36 eV है। H-परमाणु की किसी उत्तेजित अवस्था में सम्भावित ऊर्जा क्या होगी ?
A. `-3.4 eV`
B. `-4.2 eV`
C. `-6.8eV`
D. `+6.8 eV`

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Correct Answer - A
`E_(n) = ( E_(1))/( n^(2)) = ( - 13.6 )/( 2^(2)) = - 3.4 eV`

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