In the figure below, R1 = 0.215 , R2 = 2.15 , and R3 = 21.50 . Find the equivale
ID: 2051539 • Letter: I
Question
In the figure below, R1 = 0.215 , R2 = 2.15 , and R3 = 21.50 . Find the equivalent resistance of the circuit and the current in each resistor when a 3.00-V power supply is connected between points A and B, points A and C, and points A and D.
http://i.imgur.com/qvAa6.gif
(a) points A and B
Req = __________
IR1 = __________A
IR2 = __________ A
IR3 = ___________A
I100 = ___________A
(b) points A and C
Req = ___________
IR1 = ___________A
IR2 = ___________A
IR3 = ___________A
I100 = ___________A
(c) points A and D
Req = ___________
IR1 = ___________A
IR2 = ___________A
IR3 = ___________A
I100 = ___________A
Explanation / Answer
(a)R2 R3 and 100 Ohms in series so Req = 123.65 Ohms which is then parallel to .215 Ohms so Req = .215 Ohms So IR1 = 3/.215 A = 13.95 A IR2 = IR3 = I100 = .024 A (b)R3 and 100 in series parallel with R1 and R2 in series Solving gives 121.5 || 2.365 = 2.32 Ohms Req = 2.32 Ohms IR1 = IR2 = 3/2.365 = 1.27 A IR3 = I100 = .025 A (c)100 parallel with R1,R2 and R3 in series 100||23.865 = 19.27 Ohms Req = 19.27 Ohms IR1 = IR2 = IR3 = .126 A I100 = .03 A