Kirchoff's Laws for Currents in a Circuit

  • Thread starter Thread starter mriney
  • Start date Start date
  • Tags Tags
    Current Laws
AI Thread Summary
The discussion focuses on applying Kirchhoff's Laws to determine the currents through resistors in a circuit with two batteries and three resistors. The batteries have EMFs of 9.0 V and 17.0 V, while the resistors are valued at 15 Ω, 20 Ω, and 34 Ω. The participant has successfully identified the current directions but seeks assistance in calculating their magnitudes. Key equations referenced include Kirchhoff's Loop Rule and Series Law. The thread emphasizes the need for clear calculations to solve the problem effectively.
mriney
Messages
2
Reaction score
0

Homework Statement


Determine the magnitudes and directions of the currents through each resistor shown in Fig. 19-38. The batteries have emfs of [PLAIN]http://www.webassign.net/images/scriptE.gif1 = 9.0 V and [PLAIN]http://www.webassign.net/images/scriptE.gif2 = 17.0 V and the resistors have values of R1 = 15 [PLAIN]http://www.webassign.net/images/omegacap.gif, R2 = 20 [PLAIN]http://www.webassign.net/images/omegacap.gif, andR3 = 34[PLAIN]http://www.webassign.net/images/omegacap.gif.

Homework Equations


Kirchoff's Loop Rule: I1+I2+I3=0
Kirchoff's Series Law?: V1+V2+V3=0

The Attempt at a Solution


I've actually gotten the direction for all three, I just need some serious help calculating the magnitudes.
19_38.gif
 
Last edited by a moderator:
Physics news on Phys.org
Show us your equations.

Chet
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging 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

Kirchoff's Laws Current [Problem 1]
Replies
1
Views
1K
Network Analysis, Kirchhoff's Laws, changing current source to voltage
Replies
4
Views
1K
Solving Kirchoff's Laws: Are My Answers Correct?
Replies
9
Views
3K
Given Current and Resistance in a Circuit, find the Voltage of a Battery
Replies
13
Views
2K
Finding the Current in a circuit
Replies
6
Views
3K
Use Kirchoff's laws to solve for tension and current
Replies
3
Views
2K
Using Kirchhoff's laws on this current division problem
Replies
12
Views
2K
Find current given magnetic field
Replies
3
Views
2K
Kirchoff's Laws Problem Current
Replies
11
Views
2K
Two batteries and two resistors circuit - wrong possible answers ?
Replies
16
Views
2K

Hot Threads

Recent Insights

Back
Top