• Support PF! Buy your school textbooks, materials and every day products Here!

Electricity and Kirchhoff's Laws

  • Thread starter Pulser18
  • Start date
  • #1
1
0

Homework Statement



Given two batteries in parallel, one of 10V and 5Ω, and the other of 5V and 2Ω, which is attached to a 3Ω resistor, find the current that flows from the 10V battery, if the system described above is connected to a 20 resistor.

Homework Equations



Kirchhoff's two laws : (1) Current entering a junction = current leaving junction, (2) Algebraic sum of emfs = sum of all potential drops;

V = IR

The Attempt at a Solution



I think I used the laws correctly, and ended up with a final answer of 1.56 A. My attempt is attached below (the 2nd photo).

Thing is, I'm not sure if this is correct...
 

Attachments

Answers and Replies

  • #2
gneill
Mentor
20,698
2,704

Homework Statement



Given two batteries in parallel, one of 10V and 5Ω, and the other of 5V and 2Ω, which is attached to a 3Ω resistor, find the current that flows from the 10V battery, if the system described above is connected to a 20 resistor.

Homework Equations



Kirchhoff's two laws : (1) Current entering a junction = current leaving junction, (2) Algebraic sum of emfs = sum of all potential drops;

V = IR

The Attempt at a Solution



I think I used the laws correctly, and ended up with a final answer of 1.56 A. My attempt is attached below (the 2nd photo).

Thing is, I'm not sure if this is correct...
Your solution looks fine.
 

Related Threads for: Electricity and Kirchhoff's Laws

Replies
4
Views
2K
  • Last Post
Replies
8
Views
622
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
4
Views
679
  • Last Post
Replies
22
Views
3K
  • Last Post
Replies
9
Views
3K
  • Last Post
Replies
2
Views
280
  • Last Post
Replies
2
Views
1K
Top