Ensure that the multimeter is calibrated correctly. Tone Circuit. It is also a good idea to add a resistor in experimental circuits where the pot Feb 17, 2024 · This calculator provides the calculation of output voltage of a potentiometer for electrical engineering applications. A potentiometer or a resistor a pot, is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Jan 18, 2024 · Find the voltage (V) across resistor R 1 of power rating P 1 using the formula: V = √ (P 1 × R 1) Calculate the power dissipated by the second resistor (R 2 ), P 2 = V 2 /R 2. Where: V out = differential voltage across the Wheatstone bridge, in volts. current is still 100mA and your effective max. The results show every possible wiring configuration for your setup. The max Vout that you want is 5v, so lets plug that all into the voltage divider equation. 88. Trimmer Resistors - SMD 1/4IN 100 OHMS 10% Vertical Adjust. 135 ohm potentiometer used with S443A manual potentiometer. Enter at least any two input values and click calculate to solve for the remaining values. 10KLVC-DW, which shall be a linear taper style potentiometer with 10,000 (10k) ohm resistance and 1/2W power rating. Typical applications include: setting the Value of R2 of Multirange Potentiometer calculator uses Multirange Resistance = 9*Range Resistance 1 to calculate the Multirange Resistance, The Value of R2 of Multirange Potentiometer formula is defined as the resistance of the second resistor in the potentiometer setup. 1 Entering three or four values calculate the others. Parts and Materials. Then select the markings. Resistors provide a fixed value of resistance that blocks or resists the flow of electrical current around a circuit, as well as producing a voltage drop in accordance with Ohm’s law. This is true for many materials, over a wide range of voltages and currents, and the resistance and conductance of electronic components made from these materials remain constant. Voltage Divider Calculator No. The trace width is calculated as follows: First, the Area is calculated: Area [mils^2] = (Current [Amps]/ (k* (Temp_Rise [deg. Maxi, Mini, and Micro. $1199. 1) R A B = R A W + R W B. I - Current. Oct 25, 2023 · It calculates the output voltage based on the input voltage, total resistance, and the wiper position in a potentiometer voltage divider circuit. I'm looking to replace a 5K ohm linear potentiometer but can't find a supplier that has any of the style I require at a sensible price. FREE delivery Thu, Jul 11 on $35 of items shipped by Amazon. The formula used is: Output Voltage (Vout) = Input Voltage (Vin) * (Wiper Position / 100) Where: “Input Voltage (Vin)” is the voltage applied to the potentiometer. Working Principle: Potentiometers work by moving a sliding contact across a uniform resistance, adjusting the voltage output based on the contact’s position. Example Formula. Reset the calculator after each calculation for best results. The overall voltage is 14. g. Jun 16, 2024 · Voltage divider formula. Historical reasons show impedance values especially of 50 ohms, 200 ohms, or 600 ohms. Enter the resistance of the resistor in the “Resistor Resistance” field. We're all surprised the potentiometer still works. 3269W-1-101GLF. Choose the appropriate units for resistance and current from the dropdown menus next to each input field. By connecting an output pin of the potentiometer to an analog input pin, we can read the analog value from the pin, and then Oct 26, 2023 · This calculator helps you determine the voltage drop across a resistor in electrical circuits. LED Series Resistor Calculator. Since the sum of the resistances (R 1 + R 2) according the nomogram is approximately 170 ohm - the resistance R 1 can be calculated as. Description. B10K 10K Ohm Knurled Shaft Linear Rotary Taper Potentiometer with Knob/Nuts/Washer Kit-20 Pcs. The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential Jan 31, 2019 · Potentiometer Definition: A potentiometer (also known as a pot or potmeter) is defined as a 3-terminal variable resistor used to control the flow of electric current by adjusting resistance. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. 5 = (1. 2nd Band Color: black brown red orange yellow green blue violet grey white. Explanation Calculation Example: A potentiometer voltage divider is a simple circuit that can be used to adjust the voltage at a particular point in a circuit. 5-1. Jun 18, 2013 · Computer fan speed can be controlled over a certain range using a variable voltage. V R2 = 10 × (50/200)= 2. [1] If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat . Vin is the input voltage. Since this is a useful project, it is recommended to build it permanently using some form of project enclosure. The advanced online Potentiometer Calculator is used to calculate the divider voltage for three-terminal resistors. 27W. The value of Z load can be entered additionally, otherwise it uses automatically a 1 megohm load - unloaded open circuit. kiloohms = (5,000 Ω ÷ 1,000) = 5 kΩ. 2266-RES10K. For a simple, unloaded voltage divider with two resistors R 1 and R 2, you can calculate the partial voltages U 1 and U 2 using the following formulas: U 1 = U t o t a l ⋅ R 1 R 1 + R 2. Ohms rating: Input the amplifier or stereo’s power (RMS or Related: resistor calculator Ohm's Law. Here is how the Internal Resistance using Potentiometer calculation can be explained with given input values -> 12. V in = input voltage to the Wheatstone bridge, in volts. 1st Band Color: black brown red orange yellow green blue violet grey white. V out = Output / Reference Voltage. Fiore via source content that was edited to the style and standards of the LibreTexts platform. Datasheet. 5 V. 8. The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): May 31, 2023 · 2023-05-31. : 7. Mongkok Kowloon HongKong Sep 29, 2017 · Let us assume a 10k potentiometer, here if we measure the resistance between terminal 1 and terminal 3 we will get a value of 10k because both the terminals are fixed ends of the potentiometer. The voltage across the output portion of the potentiometer can be calculated using the formula V_x = V * (R_x / R), where V is Oct 10, 2019 · The 1k resistor in the shunt regulator should prevent too much current from flowing even if the pot is set to zero Ohms. 2V 5. The third calculates R2 given V1, V2 and R1. Dec 27, 2023 · These calculators perform calculations for potential divider circuits. Measuring resistance values: Connect the multimeter leads to the outer terminals of the potentiometer. 5V 5. A reminder: in general, V_1 V 1 and V_2 V 2 correspond to the amplitudes of signals, e. current is 100mA (full voltage = 10V); if you are using only 27 ohms of the potentiometer then the max. Question 3. That's To use this online calculator for Internal Resistance using Potentiometer, enter Length (L), Final Length (l 2) & Final Resistance (Ω) and hit the calculate button. 1. Mar 22, 2021 · This page titled 9: Potentiometers and Rheostats is shared under a CC BY-NC-SA 4. 5W Solder Lug from Ohmite. One of the outer pins is connected to the GND, the other to Vcc and the middle pin is the voltage output. Potentiometers are manufactured in two different “tapers”: linear and audio. 24 inch Package Content: 2 x Film Potentiometer Maxi, Mini, and Micro. Instead you should get a computer fan with a 3-wire connection and use the speed control wire with a 0-5 volt PWM signal. The analog input pin converts the voltage (between 0v and VCC) into integer values (between 0 and 1023), called ADC value or analog value. The first one calculates the voltage from known resistor values, the second finds suitable resistor values if the desired output voltage is known. power is 0. This is why electrical power transmission lines use higher voltages because it will result in less power loss due to heating. Is it possible to use a 10K one instead and somehow divide the output by 2 or go the other way and multiple a 1K by 5. It is used in a wide variety of applications, including the design and analysis of electrical circuits, the selection of resistors, and the troubleshooting of Potentiometers are commonly used for various purposes, including volume control in audio devices, brightness control in displays, and position sensors in robotics and industrial applications. Use this tool to calculate the resistance required to drive one or more series-connected LEDs from a voltage source at a specified current level. 3V 5V 5. Resistor Values. 3 V. However the range lower level speeds will be limited using this technique. R 1 ≈ (170 ohm - 47 ohm) ≈ 123 ohm. Preset pots and potentiometer almost work like the same, but they both have totally different applications. Panel Potentiometers. To get started, input the required fields below and hit the "Design Circuit". ε 1 = x l 1. Voltage (V) Apr 7, 2021 · V L =R 2 R L / ( ( R 1 R L +R 2 R L +R 1 R 2 )*V s ) Where, V in = Input Voltage. 5V 10V 12V 13. U 2 = U t o t a l ⋅ R 2 R 1 + R 2. To use the potentiometer as a voltage divider, all the three pins are connected. 0 Kierros Wirewound 50W Solder Lug from Ohmite. Aug 11, 2016 · Potentiometers can be used as voltage dividers. — Consult factory when trimming below –10%. Resistor Parallel/Series Calculator. Here . Enter the value of known variable to calculate unknown variable. Project Calculators; Find Parts For Your Unit; Hover image to zoom. RES10K – 10k Ohm 1 Gang Linear Panel Mount Potentiometer None 1. ”. Enter the voltage in volts (V), current in amps (A), then press the Calculate button to get the result in ohms (Ω). Speaker wiring is a simple process that often gets complicated when trying to visualize the wiring configuration. A potentiometer is similar to a rheostat, but it is more efficient. Calculation Example: A potentiometer is a variable resistor commonly used in electronic circuits. Use the left mouse button - click at a free space. about Bourns trimpot trimming potentiometers. If a sensitive indicating instrument is used, very little current is drawn from the source of the unknown voltage. This calculator can give results for series, parallel, and any combination of the two. Example. And the middle pin is connected to the wiper. A potentiometer is a resistor having a tap-off point that can be adjusted. Ensure your circuits operate efficiently with accurate voltage drop calculations. Difference between a Preset Pot and Normal Potentiometer. Voltage drop across R 2 = 50Ω can be found by voltage division rule, that is. Ohm’s Law Calculator. Resistance is expressed in ohms. 14. Only 15 left in stock - order soon. Jan 22, 2002 · The coding system used for capacitors is sometimes used as well (especially on small trimpots), so a 100k pot could also be marked as 104 - 10, followed by 4 zeros, or 100,000 (100k) ohms. Optimize your electrical circuit design by determining the appropriate resistor configuration for accurate voltage drops. Mounted behind the front panel for various equipment, they frequently feature buttons mounted on their shafts. The output voltage of a potentiometer circuit can be calculated using the formula Vout = V * R2 / (R1 + R2), where V is the supply voltage and R1 and R2 are the resistances of the two resistors in the circuit. Arduino - Rotary Potentiometer. Use this calculator to determine the total resistance of a network. Toasters heat bread by passing current to a I'm using 3 ohm part with 300 mA. The current I in amps (A) is equal to the voltage V in volts (V) divided by the resistance R in ohms (Ω): I =. Mouser Part #. Speaker Wiring Calculator. A schematic is automatically drawn as resistors are added to the network as a visual aid. For checkout of W973 Logic Panels and W975 Satellite Sequencers. Use DigiKey’s Ohm’s Law calculator to calculate the relationships between current, voltage, resistance, and power in simple resistive circuits. Two single-turn, linear-taper potentiometers, 5 kΩ each; One single-turn, linear-taper potentiometer, 50 kΩ ; Plastic or metal mounting box According to Ohm's Law, power can also be calculated using P = I 2R P = I 2 R or P = V 2 R P = V 2 R. Panel Potentiometers are variable resistors that are commonly used for all applications involving a reasonable number of cycles (few tens of thousands, manually actuated). Another word for voltage is ‘electric potential’, which is how the potentiometer came to have its’ name. Another application is found in a common kitchen appliance: the toaster. Ra and Rb are the resistance values of the two resistors in the voltage divider circuit. 6 Vdc (max). 3W and hence can be used only for low current circuits. 5v = (Z2/ (2kohm+Z2))*10v => Z2 = 2Kohm meaning that your pots max resistance should be 2 Kohm. This LED calculator will help you design your LED array and choose the best current limiting resistors values. Bourns. #1. An inductor L L acts the opposite way a capacitor does: An inductor becomes a short-circuit for low-frequency signals and an open circuit for high frequencies. Potentiometers, often referred to as "pots", are fundamental components in the realm of electrical engineering. 5V 24V 28V 36V 40V 48V 52V 72V 85V 95V. VR. This Javascript web calculator calculates the trace width for printed circuit board conductors for a given current using formulas from IPC-2221 (formerly IPC-D-275). Mar 29, 2024 · Explanation. where f = frequency and C = capacitance. Feb 18, 2024 · Access the Calculator: Open the Resistor Voltage Drop Calculator on your device. — Minimum preload of 1% should be maintained. R n = resistor values, expressed in ohms. Voltage (V) CUI Devices' speaker power calculator can be used to quickly solve for a speaker’s power, voltage, and impedance ratings when two values are known. R(Ω) = V(V) / I(A) The resistance R in ohms (Ω) is equal to the voltage V in volts (V), divided by the phase current I in amps (A). When the potentiometer is used as a voltage divider, the wiper position determines the output voltage. Simplify your electronics projects with this user-friendly tool. Since the reference voltage can be produced from an accurately calibrated voltage Dec 21, 2011 · V/I=Z1 or 10v/5mA=2Kohm. 0 license and was authored, remixed, and/or curated by James M. Preferred resistor values are also calculated for the second and third calculators. For this calculator to work you’ll need to know the output impedance of your amp as well as the number of speakers used in your cabinet. Calculate Power, Current, Voltage or Resistance. The general voltage divider equation (or formula) for impedances is as follows: V_2 = \frac {Z_2} {Z_1+Z_2}V_1 V 2 = Z 1 + Z 2Z 2 V 1. Power option: Power, in Watts, across the L-pad or series resistors and delivered Learn the basics of potentiometers, including their function and how to use them with Arduino boards for varying resistance. They all are talking MOQ of 1000 when I only want a handful. Jan 23, 2024 · A pot can be visualized as two resistors in sequence with a tap between them. Now that you know Vin, Z1, and your desired range of Vout, you need to solve for Z2. Just enter 2 known values and the calculator will solve for the others. RAB = RAW +RWB (2. At the extreme left of travel, RAW R A W will be 0 and RWB R W B will be equal to RAB R A B. 1) (2. OPTIONAL Amp/stereo power & min. Jan 26, 2014. Enter the values for your resistors below. The position of the wiper determines the resistance between the wiper and the side pins. X. Connect VCC to an outer pin, GND to the other, and the center pin will have a voltage that varies from 0 to VCC depending on the rotation of the pot. The surface mount resistor code calculator can be used to determine the resistance value of an SMD resistor using the markings found on the device. Series resistor option: The dB drop at the speaker due to Rseries and the total speaker Ohms load. Sep 4, 2023 · Parallel-series: up to 4 speakers in parallel which are then in series with 1 or more speakers. This LED calculator will help you calculate the resistor values you will need when designing a series/parallel LED array circuit. Provides a heat/cool ramp signal from less than 2 Vdc (min) to 16. HexOhm Calculator Calculates HexOhm wattage output based on coil resistance and potentiometer setting. 1. Enter any two known circuit parameters in the below Ohm's law calculator and calculate the remaining two values according to Ohm's Law. Y. Use this calculator to find out the ohm value and tolerance based on resistor color codes. Solution: Since the two resistance are in series, total resistance R = R 1 +R 2 = 200Ω. Minimum trimmed Vout: V or V nom – %. Ra, Rb = Resistances. Aug 18, 2021 · The LibreTexts libraries are Powered by NICE CXone Expert and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Now, let us place the wiper exactly at 25% from terminal 1 as shown above and if we measure the resistance between 1 and 2 we will get 25% of 10k which Aug 11, 2023 · Each far side of the strip is connected to a pin. For R1 and R2 in series and Vout is the voltage of R2: Calculate resistor values for precise voltage division with our Voltage Divider Calculator. RJS50K – 50k Ohm 1 Gang Linear Panel Mount Potentiometer None 1. Anyway, the appropriate way to do that is with a resistor on the top and bottom of the pot to “bias” it inside the range you need, but calculating those resistors is a bit of a pain, so I made this calculator for you. Number of Bands: 3 Band 4 Band 5 Band 6 Band. Jan 26, 2014 · 2. We can see the maximum resistance of this pot by connecting the probes at both the ends. Use this simple education potentiometer calculator to calculate vl. 8V 15V 18. The total resistance never changes. What does change is the ratio of the two pieces. 5V 7. This will give you the greatest range of speed control while at RES10. V R. Schematic symbol All resistors have two terminals , one connection on each end of the resistor. 8V 6. Hook the center pin to an ADC on a microcontroller and get a variable input from the user! This pot has a 1/4" mounting diameter and has a 10K linear taper. Order today, ships today. The easiest way to think about it is that there is a maximum current through the pot. . Tel: +86-16625136617. The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): Ohm's Law Calculator. In simple terms, a potentiometer is a variable resistor that can alter the amount of current that follows in a circuit. Consists of 2 potentiometers and a resistor assembly mounted in a test box. 795 is the maximum resistance this potentiometer has. V - voltage. The default values in the nomogram above are for U in = 12 V, R 2 = 47 ohm and U out = 3. Where: R - resistance. Standard Package. Potentiometers and Rheostats create a change in their resistive value when a connected shaft is physically rotated. 20V 10Ω. It shall be compatible with three-wire 0-10 volt control inputs on voltage control amplifiers (by others) for level adjustment from a single remote location. Just enter the Supply (Vin), the highest point the pot should give (VHigh) the lowest point (VLow), and the full resistance Feb 22, 2024 · A: Ohm’s law is one of the most important laws in electrical engineering as it provides a simple and accurate way to calculate the current, voltage, and resistance in a circuit. Potentiometers were originally based on a type of voltage-measuring instrument (voltmeter). You may be fortunate that at minimum setting the metal contacts are touching the tab and giving you a few ohms resistance. If you have a 1W 100 ohm potentiometer, the max. , sinusoidal ones. Dec 12, 2018 · For potentiometers the power rating is 0. Its cutoff frequency is also very simple to calculate: f_c = \frac {R} {2\pi L} f c = 2πLR. Learn More. The preset pot comes in small package and can be mounted on the PCB or perf board. May 30, 2019 · Specification: Product Name: Potentiometer Model: WH138 Material: Metal Resistance Value: 5K ohm Tolerance:+/-10% Turn Number:Single Turn Terminals Number:5 Features: Round Shaft Total High: 40mm Base Size: 18mm x 24mm ( HxD) Screw Thread Dia. The wiper touches the strip somewhere between the two ends. Capacitor Impedance = Z capacitor = 1 2 π f C. You can move the point where the wiper connects to the carbon strip by turning the shaft of the Sep 22, 2017 · Potentiometer Circuit. Resistor color code calculator. Ohm's law calculation formula. Pricing and Availability on millions of electronic components from Digi-Key Electronics. The output voltage of a voltage divider can be calculated using the following formula: V out = V in × (R b / (R a + R b )) Where: Vout is the output voltage. Linear taper potentiometers provide a direct, linear relationship between wiper position and resistance division, so that equal changes in wiper position result in equal changes in resistance. The tone pot's resistance is the same for all signal frequencies; however, the capacitor has AC impedance which varies depending on both the signal frequency and the value of capacitance as shown in the equation below. Adjustable Voltage Dividers A precision potentiometer built from three lower precision potentiometers. Simple to use Ohm's Law Calculator. Audio taper potentiometers provide a non-linear (logarithmic Feb 17, 2024 · Calculation Example: A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. It can be written as: R = V/I. See full list on allaboutcircuits. Jun 17, 2024 · An RL high-pass filter, built with a resistor and an inductor. Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage. Using a multimeter: Set your multimeter to the resistance (ohms) mode. Similarly, to solve for R x given the output voltage V out, we'll use KVL and KCL to arrive at the following equation: Rx = R2R3 + R3 ⋅(R1 + R2)⋅ V out V in R1 − (R1 S. Input your speaker Ohms and power values: Speaker impedance (Ohms): Fill in the speaker Ohms value for as many or as few speakers as you’d like. You are using the potentiometer as a "rheostat" - a variable resistor rather than varying the potential or voltage along the track. The measuring range of the multimeter is same as what we have seen in the Step 2. Dampers. Arduino's pin A0 to A5 can work as analog input. However in many circuits the pot might short out other parts of the circuit, causing excessively high current or overloading a signal output. 0K. Input the current flowing through the resistor in the “Current” field. A potentiometer is a three- terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Potentiometer. 9,874 In Stock. 6mm Shaft Diameter:6mm/0. If we are considering only resistances, the voltage divider formula naturally Potentiometers. C])^b))^ (1/c) Potentiometer Equation and Calculator. 50+ bought in past month. Because they are variable, there is a much smaller range of potentiometer values, almost always in a 1, 2, 5 sequence. It was define by the German scientist Georg Simon Ohm, and hence is Jan 25, 2024 · Explanation. These versatile devices play a pivotal role in controlling and measuring electrical signals, providing a dynamic interface between circuits and the physical world they interact with. Step 4: Measuring Total Resistance in the Potentiometer. Ohms law is the most fundamental law that governs the relationship between Voltage (V), Current (I), and Resistance (R). 10Ω = 2A. Note: When you select a resistor for this purpose, choose a device with a power rating between 2 and 10 times the value calculated below in order to avoid excessive To perform this test, you will need a multimeter, which measures electrical resistance. Online potentiometer calculation. 7kΩ resistor, and a 5,600,000Ω resistor can be written as 5,600kΩ or (more commonly as) 5. This resistor, along with the primary resistor allows for the creation of multiple voltage ranges for measurement or A potentiometer is an instrument for measuring voltage or 'potential difference' by comparison of an unknown voltage with a known reference voltage. A second project in this repo, the cli project, will output an amperage and wattage table to the command line for a given resistance. In the unloaded case, the same current flows through both resistors. = 2A. Previous: potentiometer voltage divider calculator. 5 days ago · The Ohm's law formula can be used to calculate the resistance as the quotient of the voltage and current. 2)/1. com Formula. 20V. 0 Kierros Wirewound 12. To use the calculator, select your drive voltage units from the dropdown, enter your two known values into the appropriate fields, click calculate, and the converted power, drive voltage, or speaker impedance value will be shown. Home. 14 V, so the resulting power equals 20 W. Where : Amps to ohms calculation with volts. 2*50 . 652-3269W-1-101GLF. It is used to control the amount of voltage that is applied to a circuit. The electrical resistance in kiloohms is equal to the electrical resistance in ohms divided by 1,000. Turn the pot and the resistance changes. It serves the same purpose as a potential divider, but it may be adjusted without having to replace any components. Enter the value of Voltage Per Unit Length (x) Enter the value of Length (l) Enter the value of E M F (ε) Reset calculator for new calculation. 05A. Both the unit and the rule are named after Georg Ohm - the physicist and inventor of Ohm's law. HVAC Supplies. The current flowing through the circuit will be I = V/R =10/200 = 0. The potentiometer control shall be Lowell Model No. Choose the code format: three digit EIA, four digit EIA, or EIA-96. Factory Set Output Voltage: -- 2V 3. For example,here's how to convert 5,000 ohms to kiloohms using the formula above. Sep 4, 2023 · The reverse speaker resistor calculator will output: L-pad option: The decibel (dB) drop for the speaker and the total L-pad resistance seen by the amplifier or etc. I =. Is a potentiometer the same as a potential divider? What is the difference between the two? A potential divider is made up of two fixed resistances. Calculation Example: A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. Z. Apr 24, 2022 · 🎥 A potentiometer, often known as a pot or a potmeter, is a three-terminal mechanically driven rotating analog device that can be found and utilized in a wi Since one kiloohm is equal to 1,000 ohms, you can use this simple formula to convert: kiloohms = ohms ÷ 1,000. 6MΩ. Simulates the HEAT and COOL ramp signal of a T7067 Dual Set Point Thermostat and the economizer low limit function. The resistance of the potentiometer is given by the formula R = (E * R) / V, where E is the voltage of the battery, R is the total resistance of the potentiometer, and V is the voltage For example, a 4,700Ω resistor is equivalent to a 4. Email: [email protected] Address: Room 5 2/F Ho King Commercial Centre 3-25 Fa Yuen Str. Mar 29, 2024 · This calculator provides the calculation of output voltage in a potentiometer voltage divider circuit. Input the current and resistance values, select your preferred units, and instantly calculate the voltage drop. VL=R2RL/ ( ( R1RL+R2RL+R1R2)*Vs) A potentiometer is a type of variable resistor that resists electric current and adjusts electrical devices. Explanation Calculation Example: A potentiometer is a three-terminal resistor with a sliding contact that forms an adjustable voltage divider. They provide a simple and convenient way to vary the resistance and adjust the output of a circuit to meet specific requirements. zo rz yp xn to lf ii ap ur te