- #1
Weaver
- 70
- 6
Homework Statement
(a) Apply Nodal Analysis, writing down the equations which determine VA and VB, the voltages at nodes A and B [8]
(b) Find values for VA and VB. [4]
(c) By calculating the currents supplied by the 44 V and 2 V sources, or by any other means, calculate the total power dissipated by this circuit.
Homework Equations
The Attempt at a Solution
(a)[/B]
(Va-44)/4 + (Va- 0)/6 + (Va-VB)/1 = 0 ... Eq 1
(Vb -Va)/1 + (Vb -0)/3 + (VB-2)/2 = 0 ... Eq 2
(b)
Eq 1 ... x 12
3Va -132 + 2Va +12Va - 12 Vb = 0
17 Va - 12Vb = 132
Eq 2 ... x6
6Vb - 6Va + 2Vb + 3 Vb -6 = 0
11Vb - 6Va = 6
Eq 1 ... x 11
187Va - 132 Vb = 1452
Eq 1 ... x 12
-72 Va + 132 Vb = 66
115Va = 1518
Va = 13.2
=> Vb = 7.7 aprox
How do I go about doing (c)?