Figure P1-16 shows an electric circuit with a voltage and a current variable assigned to each of

Question:

Figure P1-16 shows an electric circuit with a voltage and a current variable assigned to each of the six devices. Use power balance to find $v_{4}$ when $v_{1}=24 \mathrm{~V}, i_{1}=-2.1 \mathrm{~A}, p_{2}=30$ $\mathrm{W}, p_{3}=10 \mathrm{~W}, i_{4}=1.07 \mathrm{~A}$, and $p_{5}=p_{6}=2.5 \mathrm{~W}$. Is device 4 absorbing or delivering power?

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