The ratio for the speed | MODERN PHYSICS

JEE MAIN 2022

25-06-2022

Question

The ratio for the speed of the electron in the 3rd orbit of He+ to the speed of the electron in the 3rd orbit of hydrogen atom will be :-

Select the correct option:

1 : 1

1 : 2

4 : 1

2 : 1

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\begin{aligned} & \mathrm{v} \propto \frac{\mathrm{Z}}{\mathrm{m}} \propto \mathrm{Z}(\mathrm{n}=\text { constant }) \\ & \frac{\mathrm{v}_{\mathrm{He}^{+}}}{\mathrm{v}_{\mathrm{H}}}=\frac{\mathrm{Z}_{\mathrm{He}^{+}}}{\mathrm{Z}_{\mathrm{H}}}=\frac{2}{1}\end{aligned}$

Question Tags

JEE Main

Physics

Easy

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