A DC circuit problem (see the circuit below) (need to see the loops you are using, so please label the loops and nodes clearly so you can get full credit) (a) Find all the currents going through the resistors . It is ok to use software to solve the equations. (b) Find the electric potential difference between point A and point B in the circuit (see the DC circult 8, = 22 R = 42 A Ra E, > 12Volb - 62 Eg = 10 Vaiks

Referring to the example combining series and parallel circuits and Figure, calculate I3 in the following two different ways: (a) from the known values of I and I2 ; (b) using Ohm’s law for R3. In both parts explicitly show how you follow the steps in the Problem-Solving Strategies for Series and Parallel Resistors.

Brightness  250+ 450+ 800+ 1100+ 1600+   Standard 25W 40W 60W 75W 100W   Assume your utility charges 5.5 cents per kWh, remember there are 100 cents in 1 dollar and 365 days in 1 year. With this info and the "how many lumens" chart, together with the data given in the tables on the next page you now have all the information to calculate your answers. Location  Lumens per bulb Watts per bulb  Total # of bulbs  Total Watts Use: hours per day kWh per day Total kWh for 1 year  Cost per 1 year  Cost per 10 years    Kitchen overhead  800 60 6 360 3 (360(3))/1000=1.08 394.2 $21.69 $216.90   Living room 1,600 100 3 300 4 (300(4))/1000=1.2 438       Dining Room  800   5   2

7. Simplify circuit for simpler result. You can do the following problem in one of two ways, the long way with Kirchhoff's, or the shortcut way by redrawing your circuit. 4Ω V + 292 R + I 1Ω 3 Ω 3 Ω Suppose the ammter is showing 2A and the voltmeter is showing 4V, find & and R.