Spent a while on this problem. Couldn\'t figure it out. Give me an explaination

Question

Spent a while on this problem. Couldn't figure it out. Give me an explaination & answer please. Points go to the first right answer w/ explanation (not too much, just what you used).

I've already calculated:

v1=14V

v2=6V

Here's what I need to know:

Find the value of vab.

Find the value of vbc.

Find the value of vca.

Spent a while on this problem. Couldn't figure it out. Give me an explaination & answer please. Points go to the first right answer w/ explanation (not too much, just what you used). I've already calculated: Here's what I need to know: Find the value of vab Find the value of vbc. Find the value of vca.

Explanation / Answer

there is no current through 3 ohm resistor , hence potentail at a is same as the potentail across 7 ohm resistor .

Va = V1 =14 v

similarly there is no current through 4 ohm resistor , hence potentail at b is sam as voltage across

2 ohm resistor .

Vb = V2 =6 v

Vab = Va- Vb =14-6 = 8 v

b) potetail at c is zero ... that is Vc =0

    hence Vbc = Vb- Vc = 6 v

3) Vca = Vc - Va = 0 -14 = -14 v

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