University:
Swansea University
Course:
EG-086 | Engineering Science
Academic year:

2022
Views:

397

Pages:

9
Author:

Carissa Thomas

1.18 The charge entering the upper terminal of the BOX in Fig. P1.18 is shown below. How much energy is absorbed by the BOX between 0 and 9 seconds? q(t) (C) i (t) 1 12 V + − BOX 0.5 1 −0.5 −1 −1.5 Figure P1.18 SOLUTION: 2 3 4 5 6 7 8 9 t (s) 1.19 The energy absorbed by the BOX in Fig. P1.19 is shown in the graph below. Calculate and sketch the current flowing into the BOX between 0 and 10 milliseconds. i (t) w(t) (mJ) 30 12 V + − BOX 20 10 5 1 −10 −20 −30 Figure P1.19 SOLUTION: 2 3 4 6 7 8 9 10 t (ms) 1.20 Determine the amount of power absorbed or supplied by the element in Fig. P1.20 if (a) V1 = 9 V and I = 2A (b) V1 = 9 V and I = −3A (c) V1 = −12 V and I = 2A (d) V1 = −12 V and I = −3A + V1 − Figure P1.20 SOLUTION: I 1.21 Calculate the power absorbed by element A in Fig. P1.21. 3A − 15 V A + Figure P1.21 SOLUTION: 1.22 Calculate the power supplied by element A in Fig. P1.22. 2A + 20 V A − Figure P1.22 SOLUTION: 1.23 Element A in the diagram in Fig. P1.23 absorbs 30 W of power. Calculate 2A + Vx A − Figure P1.23 SOLUTION: V x. 1.24 Element B in the diagram in Fig. P1.24 supplies 60 W of power. Calculate − 24 V B + Ix Figure P1.24 SOLUTION: I x.