MCQ
The fine structure of hydrogen spectrum can be explained by:
- Athe presence of neutrons in the nucleus.
- Bthe finite size of nucleus.
- Cthe orbital angular momentum of electrons.
- ✓the spin angular momentum of electrons.
The fine structure describes the splitting of the spectral lines of atoms due to electron spin angular momentum.
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$(I)$ move $A$ to the right along $X$-axis closer to $B$
$(II)$ move $A$ to the left along $X$-axis away from $B$
$(III)$ as viewed from above, rotate $A$ clockwise about $Y$-axis
$(IV)$ as viewed from above, rotate $A$ anti-clockwise about $Y$-axis
Which of the actions will induce a current in $A$ only in the direction shown?
