Two electrical devices are connected as shown in Figure (mathrm{P} 1-15). Using the reference marks shown in

Question:

Two electrical devices are connected as shown in Figure $\mathrm{P} 1-15$. Using the reference marks shown in the figure, find the power transferred and state whether the power is transferred from A to B or B to A when
(a) $v=+12 \mathrm{~V}$ and $i=-1.2 \mathrm{~A}$
(b) $v=+80 \mathrm{~V}$ and $i=+10 \mathrm{~mA}$
(c) $v=-240 \mathrm{~V}$ and $i=-12 \mathrm{~mA}$
(d) $v=-15 \mathrm{~V}$ and $i=-300 \mu \mathrm{A}$

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