1. 1. W hich elements (individual elements, not combinations of elements) of the

Question

1.

1.      Which elements (individual elements, not combinations of elements) of the networks in the figure beloware in series? Which are in parallel? As a check on your assumptions, be sure that the elements in series have the same current and that the elements in parallel have the same voltage. Restrict your decisions to single elements, not combinations of elements.

2.Find the total resistance for the configuration of the figure below

3.For the network of the figure below

a. Find the voltages Va and Vb.

b. Find the currents I1 and Is.

Explanation / Answer

1) a) Series: R1,R2

Parallel: R3,R4,R5

b) Series: R1

Parallel:R2, R3, R4

c) Series:R1

Parallel: R2, R3, R4

d) Series:

Parallel:

e) Series:

Parallel:

f) Series:

Parallel:

2) Rt = 10K||2.2K + 10K||2.2K = 1.8K + 1.8K = 3.6 Kohm..

3) Va= +32 V

Ib = 32 - 0 / 12+8 = 1.6 A.. Vb = 1.6 x 8 = 12.8 V..

Let current thru 24 ohm be Ib1..

Ib1 = 32-0 / 24+12 = 0.89 A..

I1 = 1.6 + 0.89 = 2.49 A..

Is = 2.49 + (32/72) + (32/18) = 4.69 A..

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