*So V one is going to be the current I multiplied by resistance one.*

, using values from previous calculations: Given: Solution: Now that you have solved for the unknown quantities in this circuit, you can apply what you have learned to any series, parallel, or combination circuit.

It is important to remember to first look at the circuit and from observation make your determination of the type of circuit, what is known, and what you are looking for.

Then we solve this for I three and we move this to the right hand side making it positive and then divide both sides by R three and we solve for I three.

So I three is V t minus I times R one over R three.

So we're going to have a negative potential difference there and that's minus V three and then we're done our loop.

Then we substitute I R in place of each of these voltages V one and V three.A minute spent in this manner may save you many unnecessary calculations.Having computed all the currents and voltages of figure 3-54, a complete description of the operation of the circuit can be made.The action of the circuit has been completely described with the exception of power consumed, which could be described using the values previously computed.It should be pointed out that the combination circuit is not difficult to solve.So in the circuit we have a 12 volt EMF source and there is a current I going clockwise.It goes to this resistor number one, which has a resistance of one ohm, and then passes through this parallel branch of two resistors.SERIES-PARALLEL DC CIRCUITSIn the preceding discussions, series and parallel dc circuits have been considered separately.The technician will encounter circuits consisting of both series and parallel elements.The total current of 3 amps leaves the negative terminal of the battery and flows through the 8-ohm resistor (R.At point A, this 3-ampere current divides into two currents.

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