Practice question

Given: Two capacitors of 25 pF and 50 pF are connected in series. What is the equivalent capacitance? These values define the system as per NCERT data. Formula: 1/C = 1/25 + 1/50 = 2 + 1/50 = 3/50. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: C = 50/3 approx 16.67 pF . 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.