Modern Physics 1 Question 37

34. The ratio of the kinetic energy of the $n=2$ electron for the $H$ atom to that of $He^{+}$ion is

$(2008,4$ M)

(a) $1 / 4$

(b) $1 / 2$

(c) 1

(d) 2

Objective Questions II (One or more correct option)

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Solution:

  1. Kinetic energy $K \propto Z^{2}$

$$ \therefore \quad \frac{K _H}{K _{He^{+}}}=\frac{1}{2}{ }^{2}=\frac{1}{4} $$



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