How can I measure the inductance of a coil?

Question

I have a tesla coil an i wanted to measure the inductance of the secondary coil. How do i do that without an lcr meter i have a basic resistance and voltage meter?

Answer 1

Pick a frequency, at or near your operating frequency. Use a function generator, or a transformer if 60hz is good enough. And get a bunch of resistors. And an AC voltmeter.

apply 10 volts AC or so across a resistor and the coil in series. Use the voltmeter to measure the voltage across the resistor, and then the inductor. Change/adjust the resistor until the two voltages are equal.

then use

XL = R = 2πfL

where R is the resistor value.

solve for L

L = R / 2πf

.

Answer 2

See the following link:

http://engr.nmsu.edu/~etti/fall96/electr...