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

Electric Current

  • Thread starter Phemzy
  • Start date
  • #1
4
0

Homework Statement


In the circuit below, find
(1) The total current in the circuit
(2) The battery voltage E
(3) The power loss in the 20ohms resistor

Homework Equations


V=IR


The Attempt at a Solution


I=I1+I2
V=30I1 and V=40I2
30I1 = 40I2
or
V-30I1 = V-40I2
 

Attachments

Last edited:

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
7
Hi Phemzy, welcome to PH.
Please check the problem again. To solve the problem, they must give a current in any one branch.
 
  • #3
4
0
Hi rl.bhat,

That is how the lecturer gives us the assignment.

No additional information was given

Some of my course mate said, we should use Kirchoff's rule.
 
  • #4
gneill
Mentor
20,793
2,773
Without a specific value for the battery voltage or a branch current or *something* to tell you how much energy is moving in the system, the best you can do is to find the answers symbolically.
 

Related Threads on Electric Current

  • Last Post
Replies
6
Views
544
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
1
Views
11K
  • Last Post
Replies
2
Views
603
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
6K
  • Last Post
Replies
16
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
11
Views
930
Top