# Help

Discussion in 'Homework Help' started by The Snow Ant, Mar 25, 2010.

1. ### The Snow Ant Thread Starter New Member

Mar 25, 2010
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0

how would I find the voltage that the meter should read at v1

• ###### home work.bmp
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Last edited: Mar 25, 2010
2. ### beenthere Retired Moderator

Apr 20, 2004
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Given that no values are shown for anything, you can pretty much make something up.

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3. ### The Snow Ant Thread Starter New Member

Mar 25, 2010
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here is the diagram with values

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4. ### hgmjr Retired Moderator

Jan 28, 2005
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One resistor is still missing a value.

hgmjr

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5. ### The Snow Ant Thread Starter New Member

Mar 25, 2010
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sorry lets try this again

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6. ### Terp Active Member

Jun 6, 2008
32
1
Suppose:

1) Va is the voltage across the series 2 and 6 ohm resistances, and Vb is the voltage across the 5 ohm resistor
2) Voltage on the rightmost node that branches out in three branches is Vi.

Can you express Va and Vb as functions of Vi? If two resistors are connected in series, what happens to the voltage across each one of them? Does the value change with changing values of the resistances?

After you find Va and Vb in terms of Vi, the difference between the two is what the meter reads. But, how on earth will you determine what Vi is? Well, think about the circuit as a closed loop, if you know the loop current can you use it to find Vi?