Solving Q=Q0(e^(-t/RC)): Need Help for Part C

  • Thread starter Thread starter flyers
  • Start date Start date
Click For Summary
The discussion revolves around solving the equation Q = Q0(e^(-t/RC)) for a specific homework problem. The user seeks clarification on the value of R to use in part C, noting that R2 and R3 are in series when the switch opens, leading to an answer of 0.166 seconds. There was initial confusion regarding the configuration of R2 and R3, as the user mistakenly thought they were in parallel. Ultimately, the user acknowledges the correct series connection, which resolves their confusion. Understanding the circuit configuration is crucial for solving the problem accurately.
flyers
Messages
28
Reaction score
0

Homework Statement


nwbpko.png



2. Homework Equations

Q= Q0(e^(-t/RC))

The Attempt at a Solution



I need help for part C.I am confused as to what value I should put for R.

The answer is supposed to be .166 seconds
 
Physics news on Phys.org
R2 and R3 are in series when the switch opens. Did you get parts a) and b) right?

Find when Q=.25*Q0
 
I was confused because I thought R2 R3 were connected in parallel, but I see why they are in series now. Thanks
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
View full post »

Similar threads

Why can we add impedances in series?
  • · Replies 4 ·
Replies
4
Views
2K
A Capacitor with initial charge
  • · Replies 3 ·
Replies
3
Views
3K
Finding R(t) in discharging RC circuit
  • · Replies 4 ·
Replies
4
Views
2K
Set up the differential equation showing the voltage V(t) for this RC circuit
  • · Replies 19 ·
Replies
19
Views
4K
Calculating Charge and Time in a Discharging RC Circuit
  • · Replies 3 ·
Replies
3
Views
2K
Solve RC Circuit Problem: Find Time of Current > 50mA
  • · Replies 9 ·
Replies
9
Views
3K
Need help finding current on RC circuit
  • · Replies 5 ·
Replies
5
Views
7K
What is the charge on each capacitor in a circuit with capacitors in parallel?
  • · Replies 6 ·
Replies
6
Views
2K
How long after the switch is closed does the voltage across
  • · Replies 4 ·
Replies
4
Views
3K
Need help with an Electric Field Question
  • · Replies 1 ·
Replies
1
Views
954