By Dale R. Patrick
An introductory textual content, electrical energy and Electronics basics, delineates key techniques in electrical energy utilizing a simplified process that reinforces studying. Mathematical calculations are saved to the very minimal and ideas are established via software examples and illustrations. The books span of subject matters contains important details on direct present electronics, alternating present electrical energy and semiconductor units in addition to digital circuits, electronic electronics, desktops and microprocessors, digital communications, and digital strength keep an eye on. Supplementary appendices offer a thesaurus and part on electric protection in addition to a proof of soldering thoughts.
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Additional info for Electricity and Electronics Fundamentals, Second Edition
Sample text
Series-circuit example. V1 = I × R1 = 1 A × 10 Ω = 10 V V2 = I × R2 = 1 A × 20 Ω = 20 V V3 = I × R3 = 1 A × 30 Ω = 30 V In a parallel circuit, the voltage is the same across every component of the circuit. In Figure 1-58, the voltage across points A and B is equal to 10 V. This is the value of the voltage applied to the circuit. By following point A to point C, it can be seen that these two points are connected. Points B and D are also connected together. So the voltage from point A to point B will be the same as the voltage from point C to point D.
In a series circuit, the sum of the voltage drops always equals the source voltage. This can be shown by looking at the circuit shown in Figure 1-56. In this circuit, a voltage (VT) of 30 V is applied to a series circuit that has two 10- Ω resistors. The total resistance (RT) of the circuit is equal to the sum of the resistor values (20 Ω). 5 A. The voltage drop across the resistors is then 34 Electricity and Electronics Fundamentals found. 5 A × 10 Ω =15 V Resistor R2 is the same value as resistor R1 and the same current flows through it.
Through practice using the resistor color code, the value of a resistor may be determined at a glance. It is difficult to manufacture a resistor to the exact value required. For many uses, the actual resistance value can be as much as 20% higher or lower than the value marked on the resistor without causing any problem. In most cases, the actual resistance does not need to be any closer than 10% higher or lower than the marked value. Resistors with tolerances of lower than 5% are called precision resistors.
