Homework Help: Science

Posted by Anonymous on Saturday, January 7, 2012 at 4:16pm.

To find the current in a complex circuit, it is necessary to know the

potential difference in each device in the circuit.
current in each device in the circuit.
equivalent resistance of the circuit. number of branches in the circuit.

C

Three resistors connected in parallel have potential differences across them labeled V1, V2, and V3. Which of the following expresses the potential difference across all three of the resistors?

a. Vt=V1+V2+V3
b. Vt=((1/V1)+(1/V2)+1/V3))
c. Vt= V1=V2=V3
d. Vt=((1/V1)+(1/V2)+1/V3))^-1

A

Thanks in advance!

Science - Damon, Saturday, January 7, 2012 at 4:19pm
If you know the current in each device and the pathways, you know the total.

If they are in parallel, they are all at the same voltage.

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