Ohm's Law Lecture 3 PDF

IM 115 OHM’S LAW RECALL THE FUNCTION OF AN ELECTRICAL CIRCUIT VOLTAGE PRESSURE THAT DRIVES CURRENT THROUGH THE CIRCUIT CURRENT CHARGED ELECTRONS FLOWING THROUGH THE CIRCUIT THAT DISSIPATE THEIR ENERGY AND COMPLETE WORK RESISTANCE THE LOAD OR DEVICE THAT ACCEPTS THE DISSI...

IM 115 OHM’S LAW RECALL THE FUNCTION OF AN ELECTRICAL CIRCUIT VOLTAGE PRESSURE THAT DRIVES CURRENT THROUGH THE CIRCUIT CURRENT CHARGED ELECTRONS FLOWING THROUGH THE CIRCUIT THAT DISSIPATE THEIR ENERGY AND COMPLETE WORK RESISTANCE THE LOAD OR DEVICE THAT ACCEPTS THE DISSIPATED ENERGY FROM CURRENT  DEFINITION OHM’S LAW IS THE MATHEMATICAL RELATIONSHIP BETWEEN VOLTAGE, CURRENT AND RESISTANCE V  I R  V  I R 1V = 1A X 1Ω 120 V = 1A X 120Ω 120 V = 120 A X 1Ω 120 V =.5 A X 240 Ω  FINDING AN UNKNOWN VOLTAGE IF THE CURRENT ( I ) AND RESISTANCE ( R ) ARE KNOWN THE VOLTAGE ( V ) CAN BE FOUND BY: V  I R  FINDING AN UNKNOWN CURRENT IF THE VOLTAGE ( V ) AND RESISTANCE ( R ) ARE KNOWN THE CURRENT ( I ) CAN BE FOUND BY: V I R  FINDING AN UNKNOWN RESISTANCE IF THE VOLTAGE ( V ) AND CURRENT ( I ) ARE KNOWN THE RESISTANCE CAN BE FOUND BY: V R I  OHMS LAW CHART Thomas L. Floyd Copyright ©2003 by Pearson Education, Inc. Principles of Electric Circuits, 7ed. Upper Saddle River, New Jersey 07458 All rights reserved. EXAMPLE CALCULATIONS FINDING VOLTAGE, CURRENT OR RESISTANCE  EXAMPLE CALCULATIONS FINDING VOLTAGE I  2A R  60  EXAMPLE CALCULATIONS FINDING CURRENT V  12V R  24  EXAMPLE CALCULATIONS FINDING RESISTANCE V  24V I .25 A CURRENT VS VOLTAGE THE GRAPHICAL RELATIONSHIP  CURRENT VS VOLTAGE 10 Current (mA) 8 6 4 2V / 1.5 k = 1.33 mA R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 10 Current (mA) 8 6 4 4V / 1.5 k = 2.67 mA R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 10 Current (mA) 8 6 6V / 1.5 k = 4.00 mA 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 10 Current (mA) 8 8V / 1.5 k = 5.33 mA 6 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE Current (mA) 10 8 10V / 1.5 k = 6.67 mA 6 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 10 Current (mA) 12V / 1.5 k = 8.00 mA 8 6 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 14V / 1.5 k = 9.33 mA 10 Current (mA) 8 6 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V)  CURRENT VS VOLTAGE 10 Current (mA) 8 6 4 R = 1.5 k 2 2 4 6 8 10 12 14 Voltage (V) CURRENT VS RESISTANCE THE GRAPHICAL RELATIONSHIP  CURRENT VS RESISTANCE 10 10V / 1 k = 10 mA Current (mA) 8 V = 10V 6 4 2 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 10V / 2 k = 5 mA 4 2 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 10V / 3 k = 3.33 mA 2 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 10V / 4 k = 2.50 mA 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 10V / 5 k = 2.00 mA 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 10V / 6 k = 1.67 mA 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 10V / 8 k = 1.25 mA 2 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 10V / 10 k  = 1.00 mA 2 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 10V / 12 k  = 0.833 mA 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 10V / 15 k  = 0.667 mA 2 4 6 8 10 12 14 Resistance (k )  CURRENT VS RESISTANCE 10 Current (mA) 8 V = 10V 6 4 2 2 4 6 8 10 12 14 Resistance (k )  TROUBLE-SHOOTING CURRENT FLOW APM ANALYSIS PLAN MEASURE DIVIDE AND CONQUER  FIGURE 3-15 A STRING OF BULBS CONNECTED TO A VOLTAGE SOURCE. Thomas L. Floyd Copyright ©2003 by Pearson Education, Inc. Principles of Electric Circuits, 7ed. Upper Saddle River, New Jersey 07458 All rights reserved.  TROUBLE SHOOTING Thomas L. Floyd Copyright ©2003 by Pearson Education, Inc. Principles of Electric Circuits, 7ed. Upper Saddle River, New Jersey 07458 All rights reserved.