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What rms current flows in a 60 milliHenry inductor when 120 Volt-AC (rms) at a frequency of 20 kHz is applied to it? 2.5 mA 3
Self inductance of a solenoid depends on current on the solenoid none of the above the cross-sectional area of it magnetic fi
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Answer #1

60 x 103H,f 20KHZ L 120V 20000Hz Vrms 60mH

Inductive reactance offered by inductor in the path of current is-

  Хи— wL 2тf.L

RMS value of current is-

rms Irms XL

Vrms Irms 2f L

120 Irms 2 x 3.14 x 20000 x (60 x 10-3)

Ims1.592 x 10 A

15.92 mA rms

So last optiom is correct.

---------------------------------------------------------------------

Self inductance of a coil is given by-

L

Where \mathbf{\mu}=permeability of core

N=number of turns

A =cross section area of coil

l=length of coil.

So it is clear that self inductance of coil depends upon the cross section area of it.

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