ECE 205 A, B, and C Quiz#3 Calculator Model:
Name:
1. Find the equivalent resistance at terminals a-b of circuit in the figure below (10pts).
12 and 60 ohm resistors are in parallel. Hence, 12/60 = 10 ohm. This 10 ohm and 20 ohm are in series to give 30 o
ECE 205 A, B, and C Quiz#4 Calculator Model:
1. Determine Vo in the circuit below (5pts)
Name:
At the top node, KVL gives
Vo 36 Vo 0 Vo (12) 0 1 2 4
1.75Vo = 33 or Vo = 18.857V
Possibly useful formulas
Ohm' s Law : v iR, KCL : at a circuit node : i n 0, K
ECE 205 A, B, and C Quiz#2 Calculator Model:
1. Find i1, i2, and i3 in the circuit below (10pts)
Name:
At A,
2 12 i1
i1 14 A i2 2 A i3 10 A
At B, 12 i2 14 At C, 14 4 i3
Possibly useful formulas
p v i, KCL : at a circuit node : in 0, KVL : around a c los
ECE 205 E Quiz Calculator Model:
Name:
1. The net charge, q, through the circuit element (in the direction of the arrow) up to time t is given in the graph below.
q(mC) i 0 2 4 t(s)
-10
(a) How much total net charge passed through the element (in the dire
ECE 205 Section A, B, and C. Homework #7 Solutions 3.39 For mesh 1, 10 2 I x + 10 I 1 6 I 2 = 0 But I x = I 1 I 2 . Hence,
10 = 2I1 + 2I 2 + 10I1 6I 2 5 = 4I1 2I 2 For mesh 2, 12 + 8 I 2 6 I 1 = 0 6 = 3I 1 4 I 2 Solving (1) and (2) leads to I 1 = 0.8 A, I
ECE 205 Section A, B, and C. Homework #1 Solutions 1.2 (d) i=dq/dt = 1200 cos 120 t pA 1.3 (b) = 1.6 (a) At t = 1ms, i
dq 80 40 A dt 2 dq 0A dt
dq 80 20 A dt 4
2 + 5 = 2 + 5 ( )
(b) At t = 6ms, i
(c) At t = 10ms, i 1.9
(a) q idt 10 dt 10 C
0
1
3 5 1 q i
ECE 205 Section A, B, and C. Homework #4 Solutions 2.22 + v0 6 10A 2v0
At the node, KCL requires that
v0 + 10 + 2 v 0 = 0 4
v0 = 4.444V
The current through the controlled source is i = 2V0 = -8.888A and the voltage across it is v = (6 + 4) i0 (where i0 =