Electronics - RC Circuits - Discussion

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

Answer: Option A

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.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.