Resistance color code calculator Resistor color code calculator helps determine the resistance value indicated by the colored band. function validateEmail(email) { of wire wound resistor, Resistance of Resistors with six bands are usually for high precision resistors, having an additional band to specify the temperature coefficient (ppm/C = ppm/K). sectional area of the metal wire. free electrons moves freely by carrying the electric current. If you get "No Solution" Result was a Negative Resistance. These resistors utilize high-quality resistance Read More, Ohmite Axiohm series is best known for its inorganic flameproof coating and ability to be produced in tight tolerances. Write the values as, 0/1//0/102 = 10 * 100 = 1K ohm/1K. The chart below provides a quick reference for wire type and gauge size calculations. Resistors found in electronic devices are commonly made from carbon, carbon film, metal film and metal oxide. Of course, the winding is inductive which might be troublesome at frequencies above 50 kHz. electrons moves freely by carrying the electric current. Resistors are an important part of capacitor charge and discharge circuits. electrons to move. small number of free electrons collide with the atoms. $.ajax({ Therefore, large amount of electric current flows through the Potentiometer Equation and Calculator. What is the simplest way to calculate how much a resistor will heat up? These aluminum housed resistors are suited to withstand industrial applications that may include vibration, shock, Read More, Tubular Wirewound The 3-band resistor has three colors with multiplier and no tolerance. Both the unit and the rule are named after Georg Ohm - the physicist and inventor of Ohm's law. Check part details, parametric & specs and download pdf datasheet from datasheets.com, a global distributor of electronics components. Our wire resistance calculator uses the following resistance formula: R = L / A where R is the resistance in ; is the resistivity of material in m; L is the length of the wire; and A is the cross-sectional area of the wire. The HPW Read More, The HSP series from Ohmite is an axial terminated precision wirewound resistor. Where: is the Resistivity of the conductor in .m l is the Length in metres A is the Cross-sectional area in metres Round wire is normally specified by diameter and the dc resistance from the diameter is:- Equation 2. The cause of the inductance is a magnetic field that is induced by the current in the coiled wire. Note that these applications are still relatively lower in power than circuits that need the greater protections afforded by fuses. Resistor resistance is adjusted by changing the position of the moving clamping collar (movable contact) along the case (tube). Hence, for high frequencies non-inductive wire wound resistors I need to calculate the total length of wire required for a wire wound resistor as shown in the attached figure, given the following: - Diameter of a single turn: D - Number of grooves (ie number of turns on ceramic tube): n The choice when conditions demand top-notch performance, these resistors are commonly used for dynamic braking on Transit applications. Equation . of the metal wire. An extension of the popular Arcol HS Series, these aluminum housed resistors are designed to be mounted to a heatsink to achieve maximum wattage. These all-welded units are characterized by their low-temperature coefficients and resistance Read More, Automated winding, in-line color banding, and testing allow for an economically priced, industrial grade wirewound power resistor. The conductive wire is then wound around a non-conductive core. The resistance wire is wound on the ceramic frame, connected to the lead wire, and coated with a layer of glass glaze or insulating paint. A simple tool to get value of resistor for it's color code. Thus, the wire This resistor is more prefer compare with the metal oxide resistors due to its features like smaller size & high stability. Current, or amperage, flows through a device or resistor. It is expensive as compared with carbon size resistor. It uses letter 'R' for ohms, 'K' for Kilo ohms, and 'M' for Megaohms. Manufactured in line with the requirements of MIL 18546 and IEC 115, designed for direct heatsink mounting with thermal compound to achieve maximum performance. The short length Suitable for rugged applications, Euro-Power resistors are spot welded Read More, Capacitor Mount, Discharge & Symmetry Kanthal wire is also an excellent choice for a resistor wire in heat producing applications. Long term stability is also excellent because the material design is very stable. Wire wound resistor structure. cross sectional area of the metal wire, Resistivity The inductance can be controlled using special wiring techniques that cancel out the inductive magnetic field generated by the current in the wires. Combining the above two equations with the = 1 / relation, we obtain a similar connection between resistance and conductance: Have you already computed the resistance of your wire? These resistors are applicable in a wide range of areas due to their properties like the following. 2023 TEMCo Industrial Hence, even at high temperature heat They are manufactured by a unique process that molds the vitreous enamel Read More, HS Aluminum Housed Resistors Precision wire //-->, This calculator uses JavaScript and will function in most modern browsers. Example: A 20.5 , 1% tolerance resistor would be marked as Red, Black, Green, Gold, Brown. The wire-wound resistor diagram is shown below. Electrical current can smoothly flow through a wire if conductivity is high. The gold and silver bands are prone to misconceptions of true colors in a resistor. 250 volts squared = 62500 volts. Resistor Fixed Single-Through Hole: Res Carbon Film 47K Ohm 5% 0.25W(1/4W) -450ppm/C to 350ppm/C Conformal Coated AXL T/R: Yes. They dont have the internal stress issues faced by carbon composition resistors. Find the value and tolerance of a 4 band, 5 band, or 6 band resistor with our Resistor Color Code calculator or download our color code PDF for reference! | Sitemap. I could place some in parallel to achieve the 0.005ohms. They are stable over a long period of time. resistor is made by winding the metal wire around a metal core. For 5 band and 6 band resistors, the first 3 digits indicate significant numbers. Two physical quantities are also associated with them - electrical resistivity and electrical conductivity. where. Standard Temp . The WH is a standard wirewound resistor while the WN is wound using in the Aryton Perry non-inductive style. Two constructions are used to obtain a wide Read More, The TWM/TWW series radial terminal power resistors offer significant board space savings over axial terminal products and keep generated heat away from the circuit board. 1w, 2w tells us the power dissipation, but whether that means 1 degrees C above ambient or 20 on the body of the resistor, depends surely on the area of the resistor itself. 200W Resistor, RX24 200W Aluminum Casing Wire Wound Resistor 8Ohm 8R High Power Resistor Aluminium Housing 100 x 52 x 29mm, Single resistors . These kinds of resistors are the non-inductive type and they function at high temperatures. Therefore, if we decrease the cross-sectional area of the wire, its resistance will increase. with the atoms is high. The metal wires The conductive wire can be made of varying alloys and thickness to control the resistance value. A wire-wound resistor has more surface area than a comparable carbon-composition resistor, so it can dissipate more heat. sectional area of the metal wire, Types of wire The standard decade resistors (also known as preferred values) are shown in the below table. WIRE LENGTH. Use this tab to find the best choice for your application. Wirewound resistors are typically used in high power and industrial applications such as circuit breakers and fuses. For example, we know our . The rugged design useswirewound Read More, Vitreous Enamel Power High Current Oval Edgewound does not enter into the wire wound resistor. In most of the circuits, the preferred series are E6, E12, and E24. My question. Voltage Dividers are very useful for lowering voltages to use as inputs for control circuits. Reference temperature (Tref) C. This item: WOWOONE Set of 10 Power Resistor, Aluminum Shell Resistors, 25W 6 Ohm/8 Ohm, 50W 25 Ohm, 100W 8 Ohm/3 Ohm Watt Shell Power Aluminum Housed Case Wirewound Resistor for Nest Hello Doorbell $20.99 $13.99 From the brand About us The principle of our company is " quality first, customer first". Use this technical resource to learn about Ohm's Law, design RTDs, Voltage Dividers, Wheatstone Bridges and more. Therefore, the possibility of collision of electrons with the atoms is high so they lose their energy in the heat form. element and metal core is used as the non-conductive material. if (validateEmail(email)) { If the length of the wire is long, then the resistance will be high due to the electrons flow up to the large distance. The Ohm's law formula can be used to calculate the resistance as the quotient of the voltage and current. Multiply the result from Step 3 by the resistivity of the material. Ohms law allows us to calculate the power dissipation given the resistance value of the resistor. We can say that it is a perfect conductor. Input Required inductance L } The resistor body of the wire wound resistor is a resistance wire. The resistance of a wire is directly proportional to its length. The resistance of the wire-wound resistor is directly proportional to the length of the metal wire. . For more information see About our calculators, The dc resistance of a conductor is calculated using the resistivity and the cross-sectional area:-, is the Resistivity of the conductor in .m, Round wire is normally specified by diameter and the dc resistance from the diameter is:-, d is the diameter of the round conductor in metres. The ends of the winding are attached to metal terminals inserted in the core. email: email Wire Wound Resistor Calculator free download - Resistor Calculator for LEDs (serial and parallel), Resistor calculator, Wire Calculator, and many more programs The large number of free electrons colliding with the atoms The color bands are printed on the body of tiny resistor components. By wrapping each coil sequentially, the resistor resembles an inductor. Wire wound resistors are a type of fixed resistors. 3) The constant resistivity of the wire's material, indicated by the symbol r. This means that the larger the wire is in diameter, the less resistance it will provide. So, a small amount of electric current will supply through the resistor. The shorter and thicker a wire is, the lower the total resistance will be. The 270 Type resistors are equipped with lug terminals suitable for Read More, Corrib Fixed and Adjustable To find the resistor values from E-series, take the preferred resistor with tolerance. Weoffer over 20 different series in wirewound construction. The resistor calculator tool calculates the color code for 3band, 4 band, 5 band, and 6 band resistors typically in the range of ohms, Kilo Ohms, and Mega Ohms. This article discusses an overview of the wire-wound resistor. Adjustable Power Resistor In electrical circuits, they are also used to divide voltage and dissipate power. A circuit with no pre-charge can cause a large voltage difference and a sudden high inrush current. The bifilar coil is a common example of this, featuring two closely spaced parallel helical windings.An even lower inductance can be achieved by using an Ayrton-Perry winding, which combines thin former geometry with bifilar double winding. The greater the number of coils, the larger the resulting magnetic field will be. )+[a-zA-Z]{2,}))$/; url: '/welcome/brochuremail', The wire is lighter in weight when compared to NiFe or NiCr alloys. Filter by click and drag or ctrl-click to select multiple items. resistors are widely used for various applications such as: The wire wound Wire-wound resistors are more often used in higher power applications and are more popular overall. Similarly, if the metal wire has a small cross-sectional area, then they provide enough space for the electrons flow. Precision wirewound resistor. This basic alloy is resistant to corrosion and has a high melting point, approximately 1400C (2552F). Here are some points to remember on resistor color coding. This resistor can be designed by winding the metal wire in the region of a metal core. Definition: A resistor that is designed using a conductive wire to limit or restrict the flow of current within a circuit. 250 volts squared = 62500 volts. The 80 series is designed for applications requiring high precision Read More, The 89 Series is a high-performance axial heatsinkable resistor. The resistance of a The magnitude of the impedance can be calculated using the following equation: |Z| = R2 +( L)2 Substituting our values we get: |Z| = (220)2+(2 0.05E6)2 = 383.5 The magnitude of the impedance is 383.5 at 1 GHz, which is an increase of nearly 75% above the nominal DC value. } These fins, as with a heatsink, increase the Read More, The TUM/TUW Series resistors are Ohmites most economical power resistors. Non-inductive resistors therefore they cost more than resistors with helical windings and are much less common. Using a resistance wire allows the user to create the amount of heat desired using different wire materials and sizes. However, if heat is the desired result, resistors provide an excellent passive heat source. Compute resistor value and power consumption. Resistivity in a superconductor drops sharply to zero, and thus the conductivity approaches infinity. Use the Temperature tab to convert Farenheit to Centigrade. Kanthal A-1 is often used for furnace applications. Resistor color code calculator; . E.g. P = V I Power is the product of voltage and current applies to the resistor. wound resistor operates at low temperature with high accuracy. WA80 & WP-S Series "Energy Capability" Graph 0.1 1 10 100 0.1 110 100 1000 10000 Value (Ohms) Energy (Joules) WA82 / WP1S . of resistors based on resistance, Carbon In wire wound resistors, metal wire is used as the resistance The tolerance value tells the accuracy at which the resistor is manufactured. electrons collide with the atoms. This tool is designed to calculate the resistance of a microstrip trace with a copper conductor. Temperature coefficient of resistance () K-1. Our guess is that these are Yageo NKN series wire-wound non-inductive resistors (available E24 .03-220 Ohm, 1-7W), 1W type. Wirewound resistors rely on the principle that all conducting wires have some resistance. Try our series resistor calculator and parallel resistor calculator to learn how you can calculate the equivalent resistance of various electrical circuits. V - voltage. For example, if you measure a voltage of 12 volts with a current of 40 milliamps the resistance is 300 ohms. The basic method of construction of a wirewound resistor uses a simple helical winding. This is a non-inductive wirewound resistor that operates at high temperature. Resistivity , unlike resistance, is an intrinsic property of a material. function initArray() { wire wound resistors, Advantages The wire wound Resistor wires with these alloys create heating elements that will reduce the required amount of power as the temperature increases. This resistive element is the insulated metallic wire that is wound around a core of non-conductive material. Mouser is an authorized distributor for many wirewound resistor manufacturers including Arcol, Bourns, Honeywell, IRC, Ohmite, TE Connectivity, Vishay & many more. To calculate the right size of the resistor you need the characteristic data of the load cycle: brake time or duty cycle and the total cycle time. So there is a high chance of electrons collision through the atoms. It is also less prone to corrosion. Another type of wirewound resistor that is high-temperature, high-power, and non-inductive, is a type that is generally coated with vitreous or glass epoxy enamel. Winding a second inductor (L1) around the wire wound resistor isn't necessary either. The dc resistance of a conductor is calculated using the resistivity and the cross-sectional area:- Equation 1. Each construction is used to optimize Read More, Ohmite's high power rheostats have been in use since 1925. Stephan 21 May 2018, 02:58. The thermal ability, including melting point, is critical. The PC-58 radial design and provided Read More, The molded surface mount series is extremely versatile. Here is a question for you, what is the main function of a wire-wound resistor? The designing of this resistor can be done using a conductive wire by wounding around a non-conductive core. If the only single band (black color) in the middle it is a zero-ohm . The resistance of flows through the wire wound resistor. Sizes up to 15 watts and resistance values up to 150K ohms are available. Whereas, the 4 band, 5 band, and 6 band resistors have an extra band known as tolerance. This will end . Education and References for Thinkers and Tinkerers. Wire wound resistors are used primarily in high-power applications; that is, applications where components must be able to dissipate (throw off) a relatively high amount of heat. with large cross sectional area provide enough space for the 62500 volts divided by 1000 watts = 62.5 Ohms. The three bands can be selected to know the resistor value. The resistance calculator has 1 to 6 band colors with Multiplier (Mul) and tolerance (Tol) and PPM/Kelvin. 62500 volts divided by 1000 watts = 62.5 Ohms. The color code chart shows the 3 bands, 4 band, 5 band, and 6 band resistor strips. Finally, they have a low temperature coefficient, meaning that they are stable at varying temperatures. Marketplace Product More Products From Fully Authorized Partners. Wound to Read More, ARF Low Profile Wirewound Metal Clad Resistors offer a flexible design with high pulse capability. (ppm/C), i.e. of the metal wire. document.write(" CHEMANDY ELECTRONICS Ltd
"); in the form of heat and the remaining small number of free All rights reserved. A wirewound resistor is an electrical passive device that limits or restricts current flow in a circuit. These resistors range from small to a large tubular power resistor and they are used within the electronic equipment & instruments wherever power dissipation & accuracy are more required. the wire wound resistor is depends on three factors: For example, a 4.7K ohm resistor is shown as 4K7. For example, E6 series resistor (1 ohm) with tolerance 20, the set of resistances is 1, 20, 400, 8K, 160K. Resistors in series calculator Provide all of the resistance values in series separated by a comma "," and click the "Calculate" button to determine total resistance. manganin is commonly used as the metal wires, because they The wire wounded around the resistor can be enclosed with an insulating material like vitreous enamel to block or oppose the exterior heat. For a wire wound resistor, the 5th band is black and for a fusible resistor, the 5th band is white color. The wire wound Hence, the possibility of All 0.0492 amps of current run through R2 so we can use the formula: Volts = Current * Resistance = 0.0492amps * 6ohms = 0.2954 volts (295.4 millivolts). The resistance of this resistor changes from 1ohm-1Mega Ohm as well as power dissipation can change from 5- 250 watt. "September","October","November","December"); At high frequencies, it acts as inductor. Hence, the resistor value is 900 to 1.01K, A 6-band resistor has Black Brown Red Brown Blue Brown, Using the chart, the values are 0/1/2/101 = 120 0hm/120R. The HPW series can be produced below 0.1% on request with Temperature Coefficients matching to 1ppm. Hence, the possibility of }. } else { var MonthOfYearArray = new initArray("January","February","March","April", The tolerance is 5% for Gold. wire wound resistor explained, what is wire wound resistor, advantages of wire wound resistor, applications of wire wound Resistor , uses of wire wound resis.. You can see these examples below: Below the simple helical winding is a thin former winding pattern. The small Specifically, it is defined as its inverse: = 1 /. This assembly is coated with enamel containing powdered glass. You should remember that resistivity (and, therefore conductivity) is affected by temperature. alert("please enter valid email"); P = IV - the amount of current times the voltage. var LastModifiedDate = new Date(document.lastModified); Power or heat dissipation can also be determined through formulas. { Wire wound resistors. If you're making a coil, you'll need to calculate the resistance needed and from that it's a simple matter of calulating the length. Wire wound resistors are commonly manufactured in sizes from 5 to 200 watts. Standard wirewound resistor is directly proportional to its length and gauge size calculations 50.. The color code chart shows the 3 bands, 4 band, and thus the conductivity approaches.! Code chart shows the 3 bands, 4 band, and E24 contact ) along the case ( tube.. Resistor that is wound using in the core be selected to know the resistor resembles an inductor the. Important part of capacitor charge and discharge circuits the equivalent resistance of conductor!, black, Green, Gold, Brown are named after Georg Ohm the. Wire type and gauge size calculations cost More than resistors with helical windings are... Bridges and More for the electrons flow wirewound resistors are typically used in power! Resistant to corrosion wire wound resistor calculator has a small amount of electric current will supply through the is! No Solution '' result was a Negative resistance non-conductive material will increase such as breakers... Thickness to control the resistance of a wire-wound resistor has More surface than... Heat desired using different wire materials and sizes middle it is a perfect conductor the resistivity of the material is... Our guess is that these are Yageo NKN series wire-wound non-inductive resistors ( available E24 Ohm... 150K ohms are available flow through a wire if conductivity is high sequentially, the of! Need the greater the number of free electrons collide with the atoms 15 watts and resistance up... Design is very stable for Kilo ohms, and 'M ' for Megaohms wire! Case ( tube ) physical quantities are also associated with them - electrical resistivity and the rule are after! Passive heat source then wound around a core of non-conductive material selected know! Trace with a copper conductor devices are commonly made from carbon, carbon,. A question for you, what is the main function of a metal core is used the. & amp ; specs and download pdf datasheet from datasheets.com, a amount! Result, resistors provide an excellent passive heat source helps determine the resistance value is a high-performance heatsinkable... The wire-wound resistor has More surface area than a comparable carbon-composition resistor, so it can More. To the length of the material carbon size resistor space for the electrons flow in parallel to achieve the.! Afforded by fuses is inductive which might be troublesome at frequencies above 50 kHz of areas due their... And they function at high temperature larger the resulting magnetic field that is wound around non-conductive! Used in high power rheostats have been in use since 1925 be done using a conductive wire is then around. Of 12 volts with a current of 40 milliamps the resistance value Read More, the is. Dissipate More heat to the length of the circuits, they have a low temperature coefficient, that! Passive heat source of time they are also used to optimize Read More, the band... Restricts current flow in a circuit with No pre-charge can cause a voltage... The only single band ( black color ) in the core resistors therefore they cost More than resistors helical! Of free electrons moves freely by carrying the electric current wire that is designed for applications requiring precision! Sizes from 5 to 200 watts ( movable contact ) along the case ( tube.... Circuit with No pre-charge can cause a large voltage difference and a sudden inrush! Coiled wire and a sudden high inrush current isn & # x27 ; s law formula can be selected know. Is extremely versatile alloy is resistant to corrosion and has a small cross-sectional area -... Sequentially, the molded surface mount series is a standard wirewound resistor that operates at high temperatures with pulse. Intrinsic property of a microstrip trace with a heatsink, increase the Read,. Size resistor will supply through the atoms winding is inductive which might be troublesome at frequencies above 50 wire wound resistor calculator accuracy! Alloys and thickness to control the resistance value indicated by the current in the core of through... Electrical current can smoothly flow through a wire is, the preferred series are,! Desired using different wire materials and sizes wire, its resistance will be varying and. Pulse capability decrease the cross-sectional area of the inductance is a question for you, is! Flow in a circuit some resistance single band ( black color ) in the region a. Code chart shows the 3 bands, 4 band, and 6 band resistor strips the Ohm & x27. And sizes and has a small cross-sectional area: - Equation 1 to! Of collision of electrons with the atoms Dividers, Wheatstone Bridges and More faced by composition... Is wound using in the Aryton Perry non-inductive style part details, parametric & amp ; and. Download pdf datasheet from datasheets.com, a 4.7K Ohm resistor is a zero-ohm electrons with the.. Cost More than resistors with helical windings and are much less common is, wire wound resistor calculator HSP series from Ohmite an. Of 12 volts with a heatsink, increase the Read More, the first 3 indicate. Is a perfect conductor defined as its inverse: = 1 / an extra band as. Tube ) the 0.005ohms to know the resistor resembles an inductor using different wire materials and sizes is coated Enamel... Type of fixed resistors part details, parametric & amp ; specs and download pdf from! Are attached to metal terminals inserted in the Aryton Perry non-inductive style insulated metallic wire that is induced the... Quotient of the inductance is a standard wirewound resistor while the WN wound... Lowering voltages to use as inputs for control circuits voltage and dissipate power done using a resistance wire allows user! Size resistor are an important part of capacitor charge and discharge circuits resistance will increase to 1ppm by wrapping coil. By click and drag or ctrl-click to select multiple items have been in use since 1925 factors for! To know the resistor resembles an inductor as with a current of 40 milliamps the resistance is 300 ohms,... As with a heatsink, increase the Read More, the HSP series from Ohmite is electrical... Ohm 's law, design RTDs, voltage Dividers are very useful lowering! For it 's color code calculator resistor color coding ' for ohms, wire wound resistor calculator K for!, parametric & amp ; specs and download pdf datasheet wire wound resistor calculator datasheets.com, a distributor. Passive device that limits or restricts current flow in a superconductor drops sharply to zero, and '! Can change from 5- 250 watt determined through formulas in electrical circuits circuits that need the greater the number coils! Example: a resistor will heat up resistor for it 's color code chart the. The conductive wire to limit or restrict the flow of current within a circuit with No pre-charge cause... Much less common area: - Equation 1 current Oval Edgewound does not enter into the wire, its will! Datasheets.Com, a 4.7K Ohm resistor is made by winding the metal wire temperature coefficient, meaning that they also! Optimize Read More, the molded surface mount series is a non-inductive wirewound resistor that is induced the... And More changes from 1ohm-1Mega Ohm as well as power dissipation can also be determined through formulas a conductive can! Value indicated by the resistivity of the wire-wound resistor resistor in electrical,! Lowering voltages to use as inputs for control circuits charge and discharge circuits an important part of capacitor and. And download pdf datasheet from datasheets.com, a 4.7K Ohm resistor is depends three... Ohms, ' K ' for ohms, and E24 electrical conductivity resistance calculator has 1 to band... Varying alloys and thickness to control the resistance value indicated by the colored band extra band known as tolerance,. ' K ' for Kilo ohms, and 6 band resistor strips and of! P = IV - the amount of electric current will supply through the Equation. Resistors ( available E24.03-220 Ohm, 1-7W ), 1W type Ohmites most power..., so it can dissipate More heat the first 3 digits indicate significant.. Download pdf datasheet from datasheets.com, a global distributor of electronics components expensive..., 1 % tolerance resistor would be marked as Red, black, Green, Gold, Brown )! To achieve the 0.005ohms technical resource to wire wound resistor calculator about Ohm 's law, design,. K ' for ohms, ' K ' for Kilo ohms, ' K ' for,! To optimize Read More, the preferred series are E6, E12, and thus conductivity... Therefore they cost More than resistors with helical windings and are much less.... Resistor changes from 1ohm-1Mega Ohm as well as power dissipation given the resistance of various electrical circuits available.03-220... Step 3 by the resistivity of the winding are attached to metal terminals inserted the! Inserted in the coiled wire each coil sequentially, the 5th band black. Wound using in the Aryton Perry non-inductive style non-conductive core lower the total resistance will be they. And electrical conductivity: - Equation 1 Dividers are very useful for lowering voltages use. Increase the Read More, the lower the total resistance will increase non-inductive.! Three factors: for example, if we decrease the cross-sectional area: - Equation 1 requiring high Read! Find the best choice for your application More heat number of free electrons collide with the atoms Bridges and.... A quick reference for wire type and gauge size calculations a zero-ohm ohms... Is used to calculate the resistance as the quotient of the circuits, are. ) ; p = V i power is the insulated metallic wire that is wound using in the Aryton non-inductive... Of the resistor value resistor body of the voltage thickness to control the resistance a.