Question
Asked Oct 27, 2019

What rms current flows in a 60 milliHenry inductor when 120 Volt-AC (rms) at a frequency of 20 kHz is applied to it?

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Expert Answer

Step 1

Given,

fi 20 kHz
V =120 V
L 60 mH
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fi 20 kHz V =120 V L 60 mH

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Step 2

Inductive reactance (XL) is given by the product of constant 2π, and the frequency of the ac current (f ),  and the inductance of the coil (L).

-27(20 kHz) (60 mH
=7539.82
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-27(20 kHz) (60 mH =7539.82

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Step 3

Now, plugging the given...

V
ms
I.
rms
XI
120 V
7ms
7539.82 Q
IIRE
= 0.0159 A
ms
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V ms I. rms XI 120 V 7ms 7539.82 Q IIRE = 0.0159 A ms

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