(Conceptual) questions about capacitors, circuits

AI Thread Summary
The discussion focuses on the behavior of a capacitor in a circuit when a switch is opened. When the switch is opened, it creates an infinite resistance, preventing any current from flowing to the battery or the 60-ohm resistor. Consequently, the capacitor discharges solely through the 10-ohm and 40-ohm resistors. This leads to the question of how long it takes for the charge on the capacitor to decrease to 12% of its initial value. The explanation emphasizes the importance of circuit configuration in determining current flow.
ustudent
Messages
10
Reaction score
0
I have (conceptual) questions about this question posted before:

https://www.physicsforums.com/showthread.php?t=386071

On the second part of the question (part B: The switch is opened at t = 0s. At what time has the charge on the capacitor decreased to 12% of its initial value?), why does the capacitor only discharge through the 10 ohm and 40 ohm resistors? Why doesn't any charge reach the battery or the 60 ohm resistor?

Thanks.
 
Physics news on Phys.org
because the switch is OPEN...so it's an infinite resistance...no current flows there.
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
Back
Top