The speed of electron in ground state energy level is \( 2.6 \times...

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The speed of electron in ground state energy level is \( 2.6 \times 10^{6} \mathrm{~ms}^{-1} \), then its speed in fourth excited state will be
(a) \( 5.6 \times 10^{6} \mathrm{~ms}^{-1} \)
(b) \( 6 \times 10^{5} \mathrm{~ms}^{-1} \)
(c) \( 5.5 \times 10^{5} \mathrm{~ms}^{-1} \)
(d) \( 4.3 \times 10^{6} \mathrm{~ms}^{-1} \)
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