Question: 121 Two electrical devices are connected as shown in Figure P121. Using the reference marks shown in the figure, find the power transferred and state

1–21 Two electrical devices are connected as shown in Figure P1–21. 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 V and i = −1:2A

(b) v = + 80 V and i = + 10mA

(c) v = −240 V and i = −12mA

(d) v = −15 V and i = −300 μA

A + V B FIGURE P1-21

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