Electrical Engineering - RC Circuits - Discussion
Discussion Forum : RC Circuits - General Questions (Q.No. 14)
14.
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:
Discussion:
8 comments Page 1 of 1.
Danmarch said:
1 decade ago
Phase angle = tan-1(Xc/R), So Xc must be greater than R.
Mayur said:
1 decade ago
Capacitor inject the reactive power.
Nag said:
10 years ago
For pure capacitor angle = 90.
If R increases then angle decreased.
So increases angle R decreased.
If R increases then angle decreased.
So increases angle R decreased.
Hareesh said:
10 years ago
Phase angle tan-1(Xc/r).
Given 45 degrees.
Xc/R = tan-1 45.
So Xc = R.
Given 45 degrees.
Xc/R = tan-1 45.
So Xc = R.
Mohan said:
9 years ago
@Hareesh, What you said is right. But the question is to mention the condition for phase angle above 45 degrees so Xc>R.
Alok kumar gautam said:
9 years ago
It is not tan-1. It is tan inverse.
Pankaj said:
8 years ago
For pure capacitor angle = 90.
If R increases then angle decreased.
So increases angle R decreased.
So, I agree with the given answer.
If R increases then angle decreased.
So increases angle R decreased.
So, I agree with the given answer.
ABHI said:
4 years ago
@Harish
When r>Xc;
tan-1(r/Xc) will be more than 45 degree.
When r>Xc;
tan-1(r/Xc) will be more than 45 degree.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers