# Find the current through and the potential difference of resistor

1. Apr 12, 2009

### rayhan619

1. The problem statement, all variables and given/known data

For the circuit shown in the figure, find the current through and the potential difference across each resistor. (Figure attached)
a) Find the current through 4.0 ohm resistor.
b) Find the potential difference across 4.0 Ohm resistor.

2. Relevant equations

V = IR
Q = VC

3. The attempt at a solution

#### Attached Files:

• ###### 1.jpg
File size:
17.9 KB
Views:
1,304
2. Apr 12, 2009

### Feldoh

Re: Circuit

So how far have you gotten on your own?

3. Apr 12, 2009

### rayhan619

Re: Circuit

so the current through 4.0 ohm resistor, I = V/R = 24 V/4 Ohm = 6 A
and the potential difference ?

4. Apr 12, 2009

### rl.bhat

Re: Circuit

Using formula for series and parallel combination of resistances find the total resistance of the circuit.

5. Apr 12, 2009

### rayhan619

Re: Circuit

If i did it right then the total resistance should be 12 Ohm
So I = V/R= 24 V/ 12 Ohm = 2 A.
Right ?
how do I get potential difference?

6. Apr 13, 2009

### rl.bhat

Re: Circuit

2A is the current through 4 ohm. Find potential difference by using V = IR.

7. Apr 13, 2009

### rayhan619

Re: Circuit

V = IR = 2A*4 Ohm = 8 V

8. Apr 13, 2009

### rayhan619

Re: Circuit

Next question,
Find the current through 6.0 {Ohm resistor.

9. Apr 13, 2009

### rl.bhat

Re: Circuit

Potential difference across 4 ohm resistor is 8V.
What is the pd across remaining circuit? From that find the current in each branch of the circuit.