Practice question

Given: The speed of an electron in the first orbit of a hydrogen atom is 2.2 × 10⁶ m/s . What is its speed in the second orbit? These values define the system as per NCERT data. Formula: v_n = v_1/n, v_1 = 2.2 × 10⁶ m/s. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: For n = 2 : v_2 = 2.2 × 10⁶/2 = 1.1 × 10⁶ m/s . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.