Chapter 1, Problem 20P

Determine the amount of power absorbed or supplied by the element in Fig. P 1.20 if

(a) $V_1=\text{9 V}$ and $I=2\text{A}$

(b) $V_1=\text{9 V}$ and $I=-3\text{A}$

(c) $V_1=-\text{12 V}$ and $I=2\text{A}$

(d) $V_1=-\text{12 V}$ and $I=-3\text{A}$