KCET2020PhysicsAlternating Current
In the given circuit the peak voltage across C , L and R are 30 ~V , 110 ~V and 60 ~V , respectively. The rms value of the applied voltage is
Options
- A100 ~V
- B200 ~V
- C70.7 ~V
- D141 ~V
Correct answer
C. 70.7 ~V
Step-by-step solution
Given, V_ C =30 ~V , V_ L =110 ~V and V_ R =60 ~V The peak voltage across series L-C-R circuit is given by aligned V_ O &= V_ R ²+ (V_ L -V_ C )² &= (60)²+(110-30)² &= (60)²+(80)² =100 ~V aligned Rms value of voltage, V_ rms =