- #1

Acuben

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## Homework Statement

find the rms current delievered by the 45v (rms) power supply when

a) the frequency is very large

and b) the frequency is very small.

answer: a) 225mA, b) 450mA

http://yfrog.com/jucurrentqg

http://img714.imageshack.us/img714/1592/currentq.gif

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## Homework Equations

w= angular velocity (supposed to be omega)

L= inductor

C= capacitor

j= complex coefficent = sqrt(-1)

Zl= resistance of inductor

Zc= resistance of capacitor

Ztot= total resistance

R= resistance of resistor

P= Power

Xl=wL

Xc=1/wc

Zl=j*Xl

Zc=-j*Xc

Ztot= R + Zl + Zc = R + j(Xl-Xc)

## The Attempt at a Solution

with frequency just being high, how am I supposed to get these exact numbers without letters/symbol for I? o.o I tried the calculation and omega did not cancel out either.

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