JEE MAIN - Physics (2022 - 25th June Morning Shift - No. 15)
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 :
1 : 1
1 : 2
4 : 1
2 : 1
توضیح
We know that $$v \propto {Z \over n}$$
$$\Rightarrow$$ Required ratio $$ = {{{2 \over 3}} \over {{1 \over 3}}}$$
$$ = 2:1$$