Electronics and Communication Engineering - Automatic Control Systems - Discussion
Discussion Forum : Automatic Control Systems - Section 1 (Q.No. 21)
21.
In the given figure the input frequency is such that R << Xc, then
Answer: Option
Explanation:
Voltage across capacitor lags by 90°.
Discussion:
4 comments Page 1 of 1.
Santosh Gupta said:
2 years ago
Here, we have to use phase angle formula.
Yes, you are right @Khatendra
It's 90°.
Yes, you are right @Khatendra
It's 90°.
Arfeen said:
5 years ago
Yeah, @Kuldeep.
I agree with you answer should be C.
I agree with you answer should be C.
Kuldeep said:
6 years ago
i = vi/(r-jxc)
vo = i * (-jxc)
vo = vi * -jxc/(r-jxc)
r<< xc
vo = vi * -jxc/-jxc
vo = vi.
They should be in phase.
vo = i * (-jxc)
vo = vi * -jxc/(r-jxc)
r<< xc
vo = vi * -jxc/-jxc
vo = vi.
They should be in phase.
Khetendra Vashishtha said:
7 years ago
R << Xc. It means we neglect the R.
Tan-1 (Xc/R) = tan-1 (Xc/0) = 90.
Tan-1 (Xc/R) = tan-1 (Xc/0) = 90.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers