Skip to content
New summer mock series is live Attempt timed papers for SSC, banking, and engineering entrances with updated syllabi for this season. View exams

Question

An electron in He⁺ has an angular momentum of 3.165 × 10⁻³⁴ J s. What is its kinetic energy? (h = 6.626 × 10⁻³⁴ J s, mₑ = 9.1 × 10⁻³¹ kg)

Options

Choose one · Correct answer highlighted

Explanation

n=3. v = 1.46×10⁶ m s⁻¹. KE ≈ 9.7×10⁻¹⁹ J.