How to measure an inductance of a coil without using LCR meter?

To measure the inductance of a coil, one can use a LCR meter. But, measuring the inductance of the coil without LCR meter is also not a difficult task.

We can do it in a simple way by using some mathematical expressions. Consider a coil as shown above whose inductance is to be measured and then follow these steps:-

1) Take a battery and an ammeter and connect them in series with coil. Take a voltmeter and measure the battery voltage. The ammeter will give current through the coil. The voltmeter will give voltage across the coil. Then find resistance of the coil by using mathematical expression

2) Disconnect the battery and connect an A.C source of some frequency "f" hz across the coil. Then using voltmeter and ammeter reading, find the impedence of the coil by using mathematical expression

Now, as we have the impedence of the coil and resistance of the coil, we can now find the inductive reactance of the coil using the expression below

After getting Xcoil, you are just one step away to get the inductance of coil. Using the final expression,

I hope you have got some good and relevant information from this blog.

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