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Current from a sine wave signal

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Homework Statement


Given a sine wave signal (20V PP) connected to a 10 kilo-Ohm resistor. Calculate the current through the resistor in terms of average, rms, and peak currents. What wattage rating should the resistor have?


Homework Equations


Vrms=(1/Sqrt(2))(Vp)
V=IR

The Attempt at a Solution



For peak I'm assuming that since peak voltage means peak current, we would find the peak current by:

Vp=IR where Vp=Vpp/2=20/2=10V

So: Imax=(10V)/(10E3)= 1E-3 A

Since Vrms=Vp/sqrt(2)

Irms=Vrms/R=(10/sqrt(2))/(10E3)=7.07E-4A

I don't know how to fine I average though....

Any help would be great!
 

Answers and Replies

  • #2
gneill
Mentor
20,793
2,773
What's the average of a sinewave?
 

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