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Find the potential Difference

  • Thread starter looi76
  • Start date
81
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1. Homework Statement
http://img241.imageshack.us/img241/1087/09052008hf9.png [Broken]
What is the potential difference across (i) AB (ii) BC.
2. Homework Equations
??
3. The Attempt at a Solution
(i) [tex]\frac{200}{400} \times 6 = 3V[/tex]

Is this right? :confused:
 
Last edited by a moderator:
161
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I think the easiest way to do this would be to use equivalent resistances to find the current. After that it is very easy
 
81
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I didn't understand...
 

alphysicist

Homework Helper
2,238
1
Hi looi76,

We know the total resistance between A and B is 200 ohms. What is the total resistance between B and C?
 
81
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The total resistance between B and C is 100 because they are connected in parallel. So, [tex]\frac{200}{(100 + 200)} \times 3 = 2V[/tex]

Is this correct?
 

Defennder

Homework Helper
2,579
5
No, that is not the total resistance between B and C. They are both in parallel. What is the formula for resistance connected in parallel?
 

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