RC Series Circuit

Answer: C. 19.2 V

In an RC series circuit, 12 V (RMS) is measured across the resistor, and 15 V (RMS) is measured across the capacitor; the RMS source voltage is 19.2 V.

Solution:

Given in the RC series circuit

R.M.S voltage across the resistor V_R=12 V

R.M.S voltage across the capacitor V_C=15 V

In the RC series circuit, the RMS source voltage V_s=√(V_R²+V_C²)

V_s=√(12²+15²)=19.2 V

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