Alternating CurrentHard
Question
A 50 Hz a.c source of 20 volt is connected across Rand C as show in figure. The voltage across R is 12 volt. The voltage across C is :
Options
A.8 V
B.16 V
C.10 V
D.not possible to determine unless values of R and C are given
Solution
E2 = VR2 = 
= VR2 + VC2
[Phase different between VR & VC is 90o]
(20)2 = (12)2 + VC2
⇒ VC2 = 400 - 144 = 256
⇒ VC = 16
= VR2 + VC2[Phase different between VR & VC is 90o]
(20)2 = (12)2 + VC2
⇒ VC2 = 400 - 144 = 256
⇒ VC = 16
Create a free account to view solution
View Solution FreeMore Alternating Current Questions
The voltage of an AC source varies with time according to the equation, V = 100 sin 100 π t cos 100 πt. Where ...In the condition of resonance what is the value of frequency in Hz. When C = 1μF and L = 1μH :...If the frequency of the source e.m.f. in an AC circuit is n, the power varies with a frequency :...In the L − R circuit R = 10Ω and L = 2H. If 120 V, 60 Hz alternating voltage is applied then the flowing curr...For given circuit the power factor is :...