- AZeeman effect
- BStark effect
- CLande's splitting
- Dnuclear magnetic spin
Explanation:
In atomic physics, hyperfine structure is the different effects leading to small shifts and splitting in the energy levels of atoms, molecules and ions. The name is a reference to the fine structure which results from the interaction between the magnetic moments associated with electron spin and the electrons' orbital angular momentum. Hyperfine structure, with energy shifts is typically orders of magnitude smaller than the fine structure, results from the interactions of the nucleus (or nuclei, in molecules) with internally generated electric and magnetic fields.
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Two resistances are joined in parallel whose resultant is ohm. One of the resistance wire is broken and the effective resistance becomes 2Ω. Then the resistance in ohm of the wire that got broken was
|
(a) 3/5 |
(b) 2 |
(c) 6/5 |
(d) 3 |

A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is
|
(a) 5B |
(b) 3B |
(c) 2B |
(d) 4B |
A ray of light is incident at 50° on the middle of one of the two mirrors arranged at an angle of 60° between them. The ray then touches the second mirror, get reflected back to the first mirror, making an angle of incidence of
|
(a) 50° |
(b) 60° |
(c) 70° |
(d) 80° |