Solve Circuit Problem: Find Battery Resistance

  • Thread starter Thread starter GreenPrint
  • Start date Start date
  • Tags Tags
    Circuit
AI Thread Summary
The discussion centers on a circuit problem involving the calculation of battery resistance. The user is struggling to find the correct resistance value and has shared a picture for reference. It is noted that the total current through resistors R1 to R4 is 6A, contradicting an earlier assumption of 5A. This discrepancy suggests that the calculated current through R2 and its resistance are incorrect. Clarification on these points is necessary for accurate problem-solving.
GreenPrint
Messages
1,186
Reaction score
0

Homework Statement



I'm having problems solving for the resistance of the battery see the picture

http://img202.imageshack.us/img202/9831/capturehj.jpg"

Homework Equations



V=IR

The Attempt at a Solution



see the picture click the link
 
Last edited by a moderator:
Physics news on Phys.org
GreenPrint said:

Homework Statement



I'm having problems solving for the resistance of the battery see the picture

The sum of the current through R1...R4 is 6A, and not 5A, so your answers for
The current through R2 and the resistance of R2 must be wrong.
 

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 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Thread 'Calculation of Tensile Forces in Piston-Type Water-Lifting Devices at Elevated Locations'

Figure 1 Overall Structure Diagram Figure 2: Top view of the piston when it is cylindrical A circular opening is created at a height of 5 meters above the water surface. Inside this opening is a sleeve-type piston with a cross-sectional area of 1 square meter. The piston is pulled to the right at a constant speed. The pulling force is（Figure 2）： F = ρshg = 1000 × 1 × 5 × 10 = 50,000 N. Figure 3: Modifying the structure to incorporate a fixed internal piston When I modify the piston...
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

Circuit with potential difference across battery being zero?
Replies
3
Views
1K
How to solve for EMF and internal resistance in a circuit?
Replies
8
Views
3K
Batteries in series, parallel, and internal resistance
Replies
24
Views
5K
Internal Resistance of a Car Battery
Replies
8
Views
13K
Circuit Problem -- With only a battery in the circuit, will current flow?
Replies
21
Views
2K
Two vertical bars are connected at the bottom via resistance......
Replies
7
Views
986
Unraveling the Mystery of EMF Internal Resistance
Replies
2
Views
2K
I''What is the optimal resistance for maximizing battery terminal voltage?
Replies
2
Views
1K
Batteries, Resistance, Power, Potential, and Current
Replies
3
Views
1K
Calculating current with and without internal resistance
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top