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The energy of an electron revolving in n th Bohr's orbit of an atom is given by the expression;
(1) En= 2Π2 me2 z2/n2h2
(2) En= 2Π2 me2 z2/ n2h2
(3) En= 2Π2 me2 z2/n2h2
(4) En= 2Π2 me2 z2/n2h2
Ans: En= 2Π2 me2 z2/n2h2
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