# How to Convert Inductance from the Time Domain to the Frequency Domain

To convert inductance from the time domain to the frequency domain, we use the formula:

**Inductance in Frequency Domain= jwl**

where

w= the radians per seconds (rad/s) of the power source

l= the inductance of the inductor

### Example

If a power source of 20cos4t V is powering an inductor of 1H, the inductance is

Inductance in frequency domain = jwl

=j(4)(1)

=j4

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