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Definition Resistance Ohms Law Resistance: The resistance of a material is a measure of how easily a charge flows through it. Resistance: how much “push” is needed to get a given current to flow. This is the symbol we use for a “resistor:” All wires have resistance. Obviously, for efficiency in carrying a current, we want a wire having a low resistance. In idealized problems, we will consider wire resistance to be zero. Lamps, batteries, and other devices in circuits have resistance Ohm’s Law: In some materials, the resistance is constant over a wide range of voltages For such materials, we write and call the equation “Ohm’s Law In fact, Ohm’s Law is not a “Law” in the same sense as Newton’s Laws… Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance I=V/R
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Sheet1ResistorcolorResistance (kohms)40 ohm resistor39.94 ohm1brow.docx
Sheet1ResistorcolorResistance (kohms)40 ohm resistor39.94 ohm1brown black yellow silver1322red1823brown green orange13.34brown gray orange gold18.35green1836blue black red gold60.67orange blue orange gold34.4k ohmsmeasured resistanceSeries Circuit1,2,5497.498Mohms3,4,76666Kohms1,6,5375.6.377Mohms7,3,4,2248248KohmsK ohms TheoreticalParallel1,2,553.95543,4,76.2936.31,5,633.8533.92,3,4,76.086.09HybridK ohms TheoreticalK ohms observed1 in series 2 and 5 in parallel223.2223.93 in series and 4 and 7 in parallel25.225.21 in series and 6 and 5 in parallel177.5178
Sheet2Characteristic CurvemVmALight bulb3.83.336.933.861.75590.377118951521131901292491463501635501819522091440228153023425702844070345-0.05-0.056-6.51-5.98-13.2-12.1-25.8-23.7-54.4-48.9-95.5-80.6-126-101-395-168-327-159-211-134-784-195-531-178-1570-236-2500-281-4060-345
3.8 36.9 61.7 90.3 118 152 190 249 350 550 952 1440 1530 2570 4070 -0.05 -6.51 -13.2 -25.8 -54.4 -95.5 -126 -395 -327 -211 -784 -531 -1570 -2500 -4060 3.3 33.799999999999997 55 77 95 113 129 146 163 181 209 228 234 284 345 -5.6000000000000001E-2 -5.98 -12.1 -23.7 -48.9 -80.599999999999994 -101 -168 -159 -134 -195 -178 -236 -281 -345
Sheet3Characteristic CurvemVmADiode2.330.032.930.0370.0370016732307443976867.77931218142008302918444263.160.034.540.0324.40.03700.031860.032700.045821.156172.396504.86666.844320.06-2.340.02-260.02-320.03-9900.04
2.33 2.93 7 700 732 744 768 793 814 830 844 3.16 4.54 24.4 70 186 270 582 617 650 666 432 -2.34 -26 -32 -990 0.03 0.03 0.03 16 30 39 67.7 121 200 291 426 0.03 0.03 0.03 0.03 0.03 0.04 1.1499999999999999 2.39 4.8 6.84 0.06 0.02 0.02 0.03 0.04
Sheet5Characteristic CurveResistormVmA132k ohms2.28-0.00131-0.00115602320.0015300.0037220.00411110.00719900.01423600.01752000.03965400.04994300.071178000.135-2.32-0.001-33-0.001-283-0.003-1120-0.01-1850-0.015-3040-0.024-6940-0.054-10500-0.082-17800-0.138
2.2799999999999998 31 156 232 530 722 1111 1990 2360 5200 6540 9430 17800 -2.3199999999999998 -33 -283 -1120 -1850 -3040 -6940 -10500 -17800 -1E-3 -1E-3 0 1E-3 3.0000000000000001E-3 4.0000000000000001E-3 7.0000000000000001E-3 1.4E-2 1.7000000000000001E-2 3.9E-2 4.9000000000000002E-2 7.0999999999999994E-2 0.13500000000000001 -1E-3 -1E-3 -3.0000000000000001E-3 -0.01 -1.4999999999999999E-2 -2.4E-2 -5.3999999999999999E-2 -8.2000000000000003E-2 -0.13800000000000001
Resistor Circuits and Characteristic Curves
Purpose: In this lab we will introduce basic circuit analysis with series and parallel resistor circuits using Ohms Law and Kirchhoff’s laws. We will also introduce characteristic curves and diodes.
Introduction: Ohm’s Law is of general use with circuit elements, with parts of circuits, or with whole circuits. The voltage across a circuit element is equal to the resistance (or equivalent resistance) times the current flowing through the element. (V=IR)
Kirchhoff’s 1st Law of Circuits: The sum of voltages around a closed loop is equal to zero.
0
i
n
V
i = 1
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Basics Of Electricity
The document provides an overview of basics of electricity including:
1) A brief history of electrical power systems and key inventors like Thomas Edison, Frank Julian Sprague, Nikola Tesla, and William Stanley.
2) Descriptions of electrons, protons, voltage, current, resistance, and basic electric circuits.
3) Explanations of conductors, insulators, electromagnetic fields, and other fundamental concepts.
Wiring Part 4 : ohms law
This PowerPoint gives the information about Ohms law also explains different terms related to Ohms law ….
1.pptx4168484105164649489481510120165165161
The document provides an introduction to basic electronics components and concepts such as series and parallel circuits, resistance, resistors, switches, batteries, short circuits, breadboards, and homework involving common electronic parts. Key points covered include:
- Series circuits have components wired one after another, while parallel circuits have components wired side by side.
- Resistance controls the flow of electricity according to Ohm's Law. Resistors are used to add resistance and reduce current flow.
- Switches open or close circuits to control the flow of electricity. Batteries store and provide electrical power.
- Breadboards are used to prototype circuits and have rows to connect integrated circuit pins. Homework involves typical electronic parts like resistors, batteries
Electrical circuit
1. Current is the flow of electrons through a circuit, measured in amps. Voltage is the electrical pressure that pushes electrons through a circuit, measured in volts. Resistance opposes the flow of electrons and is measured in ohms.
2. Ohm's Law describes the relationship between current, voltage, and resistance in a circuit using the formula E=IR. It can be used to calculate any one variable if the other two are known.
3. Circuits can be connected in series, parallel, or series-parallel configurations which determine how current and voltage are distributed.
5-digital_electronics1 (1).pdf
1. This document provides an overview of basic electronic components and concepts including voltage, current, power, resistors, capacitors, semiconductors, and diodes. It describes what each component is, how it works, and examples of its applications.
2. Key concepts covered include Ohm's law, series and parallel circuits, alternating current, inductors, transformers, and the use of diodes for rectification and protection from voltage spikes.
3. Semiconductors are described as materials that can be doped to be either electron-rich n-type or hole-rich p-type, and a diode consists of a junction between n-type and p-type materials that only allows current
5-digital_electronics1.pdf
1) This document provides an overview of basic electronic components and concepts including voltage, current, power, resistors, capacitors, semiconductors, and diodes. It describes what each component is, how it works, and examples of its applications.
2) Key concepts covered include Ohm's law, series and parallel circuits, alternating current, inductors, transformers, and the use of diodes for rectification and protection from reverse polarity.
3) Semiconductors are described as materials that can be doped to become either electron-rich n-type or hole-rich p-type, and a diode consists of a junction between n-type and p-type materials that allows current to
Resistance
Resistance is the opposition to electric current in a circuit. It is measured in Ohms and can be calculated using Resistance=Voltage/Current. Resistors are used to control current and voltage in circuits. There are different types of resistors including fixed, variable, and special resistors like diodes and thermistors. Resistance is affected by several factors such as length, diameter, temperature, and material of the resistor. Resistors have many applications including in automotive, aerospace, railways, food/beverage, and other industries.
Basic Elec 1.pptx
This document defines basic electrical concepts and components. It aims to explain electricity, current, voltage, resistance, Ohm's law, and the differences between alternating current (AC) and direct current (DC). Key points covered include the basic particles that make up electric charge, the three classifications of materials as conductors, insulators or semiconductors, circuit diagrams, and formulas for power, current, voltage and resistance.
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一比一原版(UC Berkeley毕业证)加利福尼亚大学|伯克利分校毕业证成绩单专业办理
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Basic EEE
- 1. Welcome to my Presentation NAME: MD. MOSTAFIJUR RAHMAN ID: 191-23-586 DEPT. OF TEXTILE BATCH: 41(EVENING) Basic EEE
- 2. Presentation Topic Name Definition Resistance Ohms Law
- 3. Resistance The resistance of a material is a measure of how easily a charge flows through it. Resistance: how much “push” is needed to get a given current to flow. The unit of resistance is the ohm: Resistances of kilohms and megohms are common: V R I 1 V 1 . 1 A 3 6 1 k 10 , 1 M =10 .
- 4. Every circuit component has resistance. This is the symbol we use for a “resistor:” All wires have resistance. Obviously, for efficiency in carrying a current, we want a wire having a low resistance. In idealized problems, we will consider wire resistance to be zero. Lamps, batteries, and other devices in circuits have resistance
- 5. Resistors are often intentionally used in circuits. The picture shows a strip of five resistors (you tear off the paper and solder the resistors into circuits). Resistors
- 6. Ohm’s Law In some materials, the resistance is constant over a wide range of voltages For such materials, we write and call the equation “Ohm’s Law In fact, Ohm’s Law is not a “Law” in the same sense as Newton’s Laws… Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance I=V/R V IR,
- 7. Materials that follow Ohm’s Law are called “ohmic” materials, and have linear I vs. V graphs. Materials that do not follow Ohm’s Law are called “nonohmic” materials, and have curved I vs. V graphs. I V I V slope=1/R
- 8. THE END