Calculate the power absorbed by element A in the figure.
Solution:
We know that power, p=vi where v is voltage and i is current.
From the question, we know that power is absorbed by element A. Thus, using the sign convention given to us in the diagram:
p=(15v)(-3A)
p=-45w
This question can be found in Basic Engineering Circuit Analysis, 10th edition, chapter 1, question 1.21.
