Circuits capacitors, voltage and charge problem.

AI Thread Summary
The discussion focuses on calculating the charge on capacitors in a circuit where C1, C2, and C3 are equal at 54.2 microfarads, and C4 is 68.1 microfarads, with a known charge on C2 of 62.4 microfarads. Participants emphasize the importance of understanding the relationships between charge, voltage, and capacitance, noting that charge can be calculated using the formula charge = voltage * capacitance. To determine the charge on C4, the voltage across it must first be established, which is a point of confusion for one participant. The conversation highlights the need for clarity on how to derive the voltage across capacitors in series and parallel configurations. Understanding these principles is crucial for solving the problem effectively.
zyphriss2
Messages
18
Reaction score
0
A. Suppose in the figure that C1 = C2 = C3 = 54.2 microfarads and C4 = 68.1 microfarads.

If the charge on C2 is Q2 = 62.4 microfarads determine the charge on each of the other capacitors.


B. charge=voltage*capacitance
series equivalent capacitance=1/c1 + 1/c2 + 1/c3 + ...
Parallel equivalent capacitance= c1+c2+c3


I just tried taking the voltage across the C2 then plugging it into find the charge at c4 which i thought was 49.6 microfarads...I knew it was a long shot but its my last problem and I have no clue where to start.
 

Attachments

  • GIANCOLI.ch24.p30.jpg
    GIANCOLI.ch24.p30.jpg
    3.4 KB · Views: 507
Physics news on Phys.org
Hi zyphriss2! :wink:

To find the charge across C4, you obviosly need to know the voltage across C4 …

how would you find that? :smile:
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Equivalent Capacitance and Resistance of this Circuit
Replies
27
Views
5K
Calculating the voltage across capacitors and resistors with switches
Replies
2
Views
717
Struggling to find the equivalent capacitance of this circuit
Replies
11
Views
2K
Calculating Capacitance in a Mixed Circuit?
Replies
9
Views
2K
Capacitance in a Complicated Mixed Circuit
Replies
19
Views
2K
LC oscillations - two capacitors and an inductor
Replies
15
Views
521
Capacitor Charging: Voltmeter, Charge & Voltage Calculations
Replies
9
Views
2K
Capacitors in Series and Parallel
Replies
1
Views
4K
Non-Complex Capacitor Potential Difference question
Replies
9
Views
2K
What is the value of capacitance C?
Replies
3
Views
4K

Hot Threads

Recent Insights

Back
Top