current through cell a
solve by kirchoffs loop rule
Answers
Explanation:
Kirchhoff's Loop Rule states that the sum of the voltage differences around the loop must be equal to zero. To find the sum, a direction of travel must be chosen. The direction of positive current is given as counter-clockwise, and so it is easiest to use this as the direction of travel to find the sum.
Many complex circuits, such as the one in Figure 1, cannot be analyzed with the series-parallel techniques developed in Resistors in Series and Parallel and Electromotive Force: Terminal Voltage. There are, however, two circuit analysis rules that can be used to analyze any circuit, simple or complex. These rules are special cases of the laws of conservation of charge and conservation of energy. The rules are known as Kirchhoff’s rules, after their inventor Gustav Kirchhoff (1824–1887).