MCQ

Share

When an electron in hydrogen atom is excited, from its $4^{th}$ to $5^{th}$ stationary orbit, the change in angular momentum of electron is (Planck’s constant: $h = 6.6 \times {10^{ - 34}}J{\rm{ - s}}$)

• A
  $4.16 \times {10^{ - 34}}\,J{\rm{ - }}s$
• B
  $3.32 \times {10^{ - 34}}\,J{\rm{ - }}s$
• ✓
  $1.05 \times {10^{ - 34}}\,J{\rm{ - }}s$
• D
  $2.08 \times {10^{ - 34}}\,J{\rm{ - }}s$