How to Measure the Ohm Value for an Inductor

Every inductor has an ohm value that changes with frequency.
••• drosselspule, induction coil image by Sascha Zlatkov from

An inductor is a small electronic element that resists changes in an alternating current, or AC. It consists of a series of wire loops around a core that store energy in the form of a magnetic field, related to the current that passes through it. This effect, or inductance, is dependent on the material makeup and structure of the inductor. Reactance is a measure in ohms of the relationship between the inductance and frequency of the AC.

    Acquire the necessary data. You will need the inductance, measured in Henries, and the AC frequency, measured in Hertz. The inductance is usually written on the inductor itself or may be referenced in a schematic. The frequency is usually notated in an electronic schematic.

    Convert inductance as needed. Inductance is frequently expressed as micro-Henries, which represents 1,000,000 Henries. To convert to Henries, you would divide the number of micro-Henries by 1,000,000.

    Calculate reactance, in ohms, by using the formula: Reactance = 2 * pi * Frequency * Inductance. Pi is simply a constant, measured as 3.14.

Related Articles

How to Find Wattage With Voltage & Frequency
How to Design an RC Snubber
How to Use a 9-Volt Battery to Power LEDs
How to Calculate Induced Armature Voltage
What Is a Varactor Diode?
What Are Resistors Used for?
How to Calculate Capacitance for AC Coupling
How to Calculate IRMS
How to Calculate the Henrys in a Coil
Duty Cycle Formula: How to Calculate the Duty Cycle...
Types of Electrical Loads
How to Use a Variac
What Is Basic Electronics?
How to Calculate the Inductance of a Ferrite Inductor
Projects on Linear Integrated Circuits
How to Calculate Power Rating
How to Size a Transformer KVA
How to Measure Inductance of a Coil
How to Calculate a KVA Rating
How to Convert Hertz to Motor Rpm