Electrical Engineering: Principles & Applications (6th Edition)

Published by Prentice Hall
ISBN 10: 0133116646
ISBN 13: 978-0-13311-664-9

Chapter 1 - 1.2 - Problems - Circuits, Currents, and Voltages - Page 35: P1.19

Answer

6 C 72 joules power supplied by the battery

Work Step by Step

Voltage ,Vab,=-12V Current , Iab, = 3 amp We know that Charge flowing throw a point is = Current flowing x time Q = 3x2=6 column Vab = -12V Iab = 3 amp Power =-12x3=-36w power is negative so energy is supplied by the battery. when power is supplied by the battery Vab is negative it means point b is at higher potential . therefore, current will flow from b to a and electrons flow opposite to conventional direction from A to B . Hence electrons will enter b point
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