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rms value of current

vead

Nov 27, 2011
473
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Nov 27, 2011
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473
Hello
Please look at this calculation
I_20160822_133533.JPG
I don't understand why my answer is wrong. Correct answer is I rms =0.3535a and Iavg = 3.185A
 

vead

Nov 27, 2011
473
Joined
Nov 27, 2011
Messages
473
you haven't shown all your working so difficult to know where you went wrong

have a look through here and see if it helps

http://www.practicalphysics.org/explaining-rms-voltage-and-current.html
Have you seen the image that I have attached in my post? As I know if the current signal is given than we can find out rms current, peak current and average current.
Current signal is represent in image. I have solved for rms current and average current. I did all calculation but when I looked in text books. I see my answer is not correct
 

Ratch

Mar 10, 2013
1,099
Joined
Mar 10, 2013
Messages
1,099
Have you seen the image that I have attached in my post? As I know if the current signal is given than we can find out rms current, peak current and average current.
Current signal is represent in image. I have solved for rms current and average current. I did all calculation but when I looked in text books. I see my answer is not correct
If the book says the RMS for a 5 amp peak is 0.3535, then it is wrong. The correct RMS value is 3.536. Why are you using the RMS value to calculate the average current. You should use the peak value to get the correct answer.

Ratch
 
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