Is My Capacitor Fully Charged?

AI Thread Summary
A capacitor in a series circuit with a DC voltage source will reach a fully charged state when the voltage across its terminals matches that of the source, resulting in no current flow. While the charge stored in the capacitor increases with a higher DC voltage, the capacitance itself remains constant, defined as the ratio of charge to voltage (C=Q/V). Misunderstandings about capacitance increasing with voltage were clarified, emphasizing that only the charge increases. The discussion concluded with an acknowledgment of this clarification. Understanding these principles is essential for accurate circuit analysis.
Gaurav sandhu
Messages
3
Reaction score
0
suppose i have a circuit,in which a capacitor and resistances are connected in series with a DC voltage source.
then after a long interval of time we know that capacitor will have same voltage across its terminal as that of DC voltage source and no current flow in the circuit.
so, can i say at that time, my capacitor is fully charged...
 
Physics news on Phys.org
Yes, fully charged at that voltage. If you raise the DC voltage, the capacitor can store more charge.
 
anorlunda said:
Yes, fully charged at that voltage. If you raise the DC voltage, the capacitor can store more charge.
that means capacitance of a capacitor is increases with increase in DC voltage around it !

i think this is not true...
 
Gaurav sandhu said:
that means capacitance of a capacitor is increases with increase in DC voltage around it !

i think this is not true...

No. The charge stored increases, not the capacitance. Capacitance C is defined as the ratio of charge Q to voltage V. C=Q/V
 
anorlunda said:
No. The charge stored increases, not the capacitance. Capacitance C is defined as the ratio of charge Q to voltage V. C=Q/V
ok...i got it...

thanks a lot...
 
Thread 'Inducing EMF Through a Coil: Understanding Flux'

Thread 'Inducing EMF Through a Coil: Understanding Flux'

Thank you for reading my post. I can understand why a change in magnetic flux through a conducting surface would induce an emf, but how does this work when inducing an emf through a coil? How does the flux through the empty space between the wires have an effect on the electrons in the wire itself? In the image below is a coil with a magnetic field going through the space between the wires but not necessarily through the wires themselves. Thank you.
View full post »

Thread 'Reflections at the source point of a transmission line'

I was using the Smith chart to determine the input impedance of a transmission line that has a reflection from the load. One can do this if one knows the characteristic impedance Zo, the degree of mismatch of the load ZL and the length of the transmission line in wavelengths. However, my question is: Consider the input impedance of a wave which appears back at the source after reflection from the load and has traveled for some fraction of a wavelength. The impedance of this wave as it...
View full post »

Similar threads

B Some Questions about Electric Current/Capacitors to help my understanding
Replies
7
Views
2K
A An electrolytic capacitor keeps charging by itself
Replies
14
Views
2K
I Charging Capacitor with one terminal grounded
Replies
16
Views
3K
Why is current defined as the rate of change of charge?
Replies
6
Views
2K
I Parallel plate capacitor, charge imbalance VS charge redistribution
Replies
1
Views
941
B Initial current in an RLC circuit
Replies
22
Views
2K
Why Do Capacitor Plates Have Equal and Opposite Charges?
3
Replies
103
Views
7K
Grounding a circuit through a capacitor/parallel RC circuit
Replies
7
Views
3K
Some questions about capacitor discharging
Replies
7
Views
2K
Prove to me how capacitors in parallel can have the same V across plates
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top