Learning Objectives By the end of this section, you will be able to: Many complex circuits, such as the one in Figure 21.21, cannot be analyzed with the series-parallel techniques developed in Resistors in Series and Parallel and Electromotive Force: Terminal Voltage. There are,…
Learning Objectives By the end of this section, you will be able to: When you forget to turn off your car lights, they slowly dim as the battery runs down. Why don’t they simply blink off when the battery’s energy…
Learning Objectives By the end of this section, you will be able to: Most circuits have more than one component, called a resistor that limits the flow of charge in the circuit. A measure of this limit on charge flow is called resistance.…
Figure 21.1 Electric circuits in computers and servers allow large amounts of data to be quickly and accurately analyzed. (credit: WOCinTech Chat/Flickr) Chapter Outline 21.1 Resistors in Series and Parallel 21.2 Electromotive Force: Terminal Voltage 21.3 Kirchhoff’s Rules 21.4 DC Voltmeters and Ammeters 21.5 Null Measurements 21.6 DC…
Current Ohm’s Law: Resistance and Simple Circuits Resistance and Resistivity Electric Power and Energy Alternating Current versus Direct Current Electric Hazards and the Human Body Nerve Conduction–Electrocardiograms
Learning Objectives By the end of this section, you will be able to: Nerve Conduction Electric currents in the vastly complex system of billions of nerves in our body allow us to sense the world, control parts of our body,…
Learning Objectives By the end of this section, you will be able to: There are two known hazards of electricity—thermal and shock. A thermal hazard is one where excessive electric power causes undesired thermal effects, such as starting a fire in the…
Learning Objectives By the end of this section, you will be able to: Alternating Current Most of the examples dealt with so far, and particularly those utilizing batteries, have constant voltage sources. Once the current is established, it is thus…
Learning Objectives By the end of this section, you will be able to: Power in Electric Circuits Power is associated by many people with electricity. Knowing that power is the rate of energy use or energy conversion, what is the…
Learning Objectives By the end of this section, you will be able to: Material and Shape Dependence of Resistance The resistance of an object depends on its shape and the material of which it is composed. The cylindrical resistor in Figure…