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InterviewSolution
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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, potential energy and total energy decrease (b) kinetic energy decreases, potential energy increases but total energy remains same (c ) kinetic energy and total energy decrease but potential energy increases (d) its kinetic energy increases but potential energy and total energy decrease |
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Answer» Correct Answer - D The expressions of kinetic energy, potential energy and total energy are `K_n = (me^4)/(8epsilon_0^2n^2h^2) rArr K_n prop (1)/(n^2)` `U_n = (-me^4)/(4epsilon_0^2n^2h^2) rArr `U_n prop - (1)/(n^2)` and `E_n = (-me^4)/(8epsilon_0^2n^2h^2) rArr E_n prop -(1)/(n^2)` in the transition from some excited state to ground state, the value of n decreases, therefore kinetic energy increases, but potential and total energy decrease. |
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