Practice question

Given: A transformer has N_p = 500, N_s = 250 . If V_p = 240 V (rms), what is the secondary voltage? These values define the system as per NCERT data. Formula: V_s/V_p = N_s/N_p. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: V_s = V_p × N_s/N_p = 240 × 250/500 = 120 V . 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.