Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

can somebody pls check whether or not I'm in the right direction with my workings and answers. If not, can you pls advise why I've gone wrong?

thanks

question 1:

1. An inductor has a 54 ohm reactance at 60 Hz. What is the maximum current if this inductor is connected to a 50 Hz source that produces a 100 Vrms voltage?

answer:

L=?

XL = (2 pie f)(L)

54 = (2 pie 60) L

L = 54 / (2 pie 60) = 0.14H

Imax = ?

f = 50 Hz

Vrms = 100V

V max = 100 * sq root of 2

XL = wL

= (2 pie 50) (0.14)

= 43.98 = 44 ohm

therefore

Imax = Vmax / XL

= (100 * sq root 2) / 44 =3.2A

question 2:

What maximum current is delivered by a 2.2 microF capacitor when connected to a North American outlet where Vrms = 110 V and f = 60 Hz

answer

Imax = ?

Xc = 1 / (wC) = 1 / [(2 pie 60) * (2.2E-6)]

= 1206 ohm

Imax = Vmax / Xc

= (110 * sq root of 2) / 1206

=0.13A

thanks again

cseet

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# Homework Help: Can someone check my Physics working?

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