(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

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

Uploaded with ImageShack.us

2. Relevant 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)

3. 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.

**Physics Forums - The Fusion of Science and Community**

# Find current at high/low frequency

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Find current at high/low frequency

Loading...

**Physics Forums - The Fusion of Science and Community**