Resistor colour code.
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This document describes resistor color coding. It explains that resistor color coding uses colored bands to identify a resistor's value and tolerance. It provides examples of 4, 5, and 6 band resistor color codes and calculations for determining resistance value based on the band colors. It discusses that resistors come in a range of values and are identified by color codes rather than listing every possible value due to the huge number of values that would be needed.
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A resistor is a passive electrical component that implements electrical resistance. It is used to reduce current flow in electronic circuits. Resistance is measured in units called ohms, after Georg Ohm. The resistance of resistors can be measured using a resistor color code system. This involves identifying the colors on the resistor bands to determine the nominal value and tolerance range in ohms.
Electronic Devices and Circuits Manual
This document is a laboratory manual for an electronics and circuits lab course. It provides prerequisites and background information on basic electronic components like resistors, capacitors, and inductors. It explains how their values are determined from color codes. It also describes common circuit symbols and test equipment like oscilloscopes, function generators, and power supplies. The remainder of the manual lists 13 experiments involving diodes, transistors, rectifiers, filters, FETs, SCRs, and UJTs that students will perform to analyze electronic device characteristics and circuits.
Polytechnic of namibia ...
This lab report summarizes two experiments measuring resistance and voltage. In the first experiment, the resistance of three resistors was calculated from their color codes and measured with a digital multimeter. The measured values were within 5% of the calculated values, validating the accuracy of using color codes. In the second experiment, the voltage output of a power supply was measured at increasing levels and found to be slightly lower than the power supply readings due to internal resistance dropping voltage. The experiments helped familiarize the student with lab equipment and electrical measurements.
Polytechnic of namibia ...
This lab report summarizes two experiments measuring resistance and voltage. In the first experiment, the resistance of three resistors was calculated from color codes and measured with a multimeter, finding errors within 5%. The second experiment measured voltages from a power supply at increasing levels, finding small discrepancies between the power supply and multimeter readings due to internal resistance converting energy. Overall, the lab demonstrated that calculating resistance from color codes is reasonably accurate and introduced concepts of resistance, voltage measurement, and energy conversion in circuits.
resistors
Resistors are electrical components that limit or regulate the flow of electrical current in a circuit. They function by converting electrical energy into heat energy through the resistance of the material. The resistance of a component is measured in Ohms and depends on the material and geometry. Resistors are used to limit current, lower voltages, and act as sensors by changing resistance in response to other quantities like light, temperature etc. They can be connected in series or parallel in a circuit. The value of a resistor can be identified by colored bands based on an international standard color code.
Resistor Color Code power point.ppt
This document provides instructions on how to read resistor color codes to determine a resistor's resistance value. It explains that the 1st band represents the first digit, 2nd band is the second digit, 3rd band is the number of zeros, and the 4th (tolerance) band is either ±5% for gold or ±10% for silver. It includes a color code chart and examples of matching the colored bands to values and units like ohms. Practice problems are provided to help readers learn the code through examples.
Resistors.07.20.11
Resistors come in fixed and variable types. Fixed resistors have their resistance printed on them or indicated by color code, while variable resistors called potentiometers have a wiper that can be moved between two terminals to vary resistance. The four band resistor color code provides the resistance value with the first three bands giving a number and the fourth indicating the tolerance.
Components resistors
Resistors are commonly used electronic components that restrict the flow of electric current. They have a circuit symbol of a zigzag line. Most resistors have four color bands that indicate their resistance value and tolerance according to the resistor color code. Potentiometers are variable resistors that allow adjusting resistance between zero and a maximum value, and are often used as volume controls. Light dependent resistors have a resistance that varies with the amount of light shining on them.
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Resistor colour code.
- 1. Experiment no:01 Name of Experiment :Colour code of Resistor. Theory : Resistor Colour Coding uses coloured bands to easily identify a resistors resistivevalue and its percentage tolerance. RequiredEquipment : 1. 4-Band Resistor. 2. 5-Band Resistor. 3. 6-Band Resistor. 4. AVO meter. Figure: 4-Band Resistor: 4-Band Resistor 5-Band Resistor: 5-Band Resistor 6-Band Resistor: 6-Band Resistor Fig:01
- 2. Resistance is calculated this way: Resistance = (1st Digit x 10 + 2nd Digit) x Multiplier ± Tolerance. Calculation: Example 01: This resistor, read fromleft to right, has the colored bands of RED, VIOLET, YELLOW, SILVER. R = 1stDigit x 10 + 2nd Digit) x Multiplier ±Tolerance % R = (RED X 10 + VIOLET) xYELLOW ± % R = (2 x 10 + 7) x 10,000 ±10% R = 27 x 10,000 ±10% Maximum Resistance Value: R = 270000 +2700 =297000 ohm(297 K ohms). Minimum Resistance Value: R = 270000 -2700 =267300 ohm(267.3k ohms).
- 3. Fig:02 Discussion: There are many different types of Resistor available which can be used in both electrical and electronic circuits to control the flow of current or to produce a voltage drop in many different ways. But in order to do this the actual resistor needs to have some form of “resistive” or “resistance” value. Resistors are available in a range of different resistance values from fractions of an Ohm ( Ω ) to millions of Ohms. Obviously, it would be impractical to have available resistors of every possible value for example, 1Ω, 2Ω, 3Ω, 4Ω etc, because literally tens of hundreds of thousands, if not tens of millions of different resistors would need to exist to cover all the possible values. Instead, resistors are manufactured in what are called “preferred values” with their resistance value printed onto their body in coloured ink.
- 4. So to overcome this, small resistors use coloured painted bands to indicate both their resistive value and their tolerance with the physical size of the resistor indicating its wattage rating. These coloured painted bands produce a system of identification generally known as a Resistors Colour Code.