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STD 11 - 2. structure of atom — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 2. structure of atom4 Marks
MCQ
When a hydrogen sample in ground state is bombarded with electron then what potential is required to accelerate electron so that first Bracket line is emitted ............ $\mathrm{eV}$
  • A
    $12.75$
  • ✓
    $13.06$
  • C
    $12.01$
  • D
    $10.2$
✓

Answer

Correct option: B.
$13.06$
b
For first line of Brackett series $e^-$ should be present in $5^{th}$ state.

$E_5 -E_1= -0.54 -(-13.6)$

 $= 13.06\, eV$

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