# Electronics - RC Circuits - Discussion

### Discussion :: RC Circuits - General Questions (Q.No.1)

1.

In a 20 Vac series RC circuit, if 20 V is read across the resistor and 40 V is measured across the capacitor, the applied voltage is

 [A]. 45 Vac [B]. 50 Vac [C]. 60 Vac [D]. 65 Vac

Explanation:

No answer description available for this question.

 Divya said: (Nov 23, 2010) Please explain me.

 Hidenseek said: (Aug 31, 2011) (20^2 + 40^2)^(.5)= 45

 Sujit said: (Oct 12, 2011) It's RMS vslue so root(20^2+40^2)=45 . Here 20 and 40 are avg values.

 Seetharam said: (Mar 15, 2012) C will cause a phase shift between voltage and current. Therefore the voltage across the capacitor will lag that current by 90° vG = (vR^2 + vC^2)/2 = 45v

 Karthik said: (May 21, 2012) It's RMS value so root (20^2+40^2) =45. Here 20 and 40 are average values.

 Swaroop said: (Mar 9, 2018) Please explain me, how it is declared?

 Farukh said: (Dec 13, 2018) From phasor addition, we get that; VT= √(40^2+20^2) = 44.72V.