Electronics - Capacitors - Discussion
Discussion Forum : Capacitors - General Questions (Q.No. 70)
70.
What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
Discussion:
24 comments Page 2 of 3.
Naseema said:
8 years ago
For "SERIES" RC circuit Z=√(R^2+Xc^2).
But for "PARALLEL" RC circuit Z=R*Xc/√ (R^2+Xc^2).
But for "PARALLEL" RC circuit Z=R*Xc/√ (R^2+Xc^2).
Rathi said:
1 decade ago
Impedance of RC Parallel circuit is RXc/(sqrt(Xc^2+R^2))
= 12x5/sqrt(25+144)
= 4.6154 ohms
= 12x5/sqrt(25+144)
= 4.6154 ohms
Keerthi said:
1 decade ago
Impedance z = sqrt(r^2+xc^2)
Then its value is 13 but how it is 4.46 tell me please?
Then its value is 13 but how it is 4.46 tell me please?
Subbu said:
1 decade ago
Here, capacitor reactance is given so 12*5/(12+5)=3.5 ohms
Plz, say why is it wrong?
Plz, say why is it wrong?
Dsce said:
9 years ago
Z = R + jXc
= 12 + j5
= sqrt(12^2 + 5^2)
= sqrt144 + 25
= 13 ohm.
= 12 + j5
= sqrt(12^2 + 5^2)
= sqrt144 + 25
= 13 ohm.
Vid said:
1 decade ago
R and C are parallel
(R/1+RjWC)=R/sqrt(1+(RwC)2)=4.16
(R/1+RjWC)=R/sqrt(1+(RwC)2)=4.16
Apeksha said:
9 years ago
It's 4.615.
RXC/√xc^2+r^2.
You will get 4.615.
RXC/√xc^2+r^2.
You will get 4.615.
Glenn said:
1 decade ago
Rathi is correct the formula is RXc/sqrt(R^2 +Xc^2).
BANAR said:
9 years ago
How it has 4.16? The correct answer is 13 ohm.
Sagar dukre said:
9 years ago
I agree with you @Dsce.
The answer is 13ohm.
The answer is 13ohm.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers