EET 300 Lecture Notes - Lecture 2: Kirchhoff'S Circuit Laws, Geostationary Operational Environmental Satellite, Voltage Divider

• School: Old Dominion University
• Department: Electrical Engineering Technology
• Course: EET 300
• Professor: Jones

Document Summary

The algebraic sum of the voltages around a closed loop must be equal to zero . Apply the polarity sign which is attached to the entering point of the device. Kirchhoff"s voltage law states that or expressed mathematically, However, the opposite convention works just as well. Also by convention, we usually draw our loop clockwise. We apply the sign of the device that the loop first touches. The sum of the voltage rises must equal the sum of the voltage drops. The algebraic sum of the currents at a node must equal zero . By convention, currents entering a node are considered to be negative and currents leaving a node are. This demonstrates a more fun way to express kcl: Example 2: determine all currents, voltage drops, and the. I1 unknown value of r in the circuit shown. A clockwise kvl loop is drawn as shown to determine the voltage v1 across the two parallel resistors.