ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Physics => Topic started by: naved_s9994 on August 11, 2009, 07:32:02 pm

Title: Efficiency
Post by: naved_s9994 on August 11, 2009, 07:32:02 pm: Hello,
This might be a silly question...but I got it incorrect on a question.

How do you calculate the ' percentage efficiency of a transmission line ' .

Any example...or just the method even.
Thanks! :)
Title: Re: Efficiency
Post by: TrueTears on August 11, 2009, 07:37:49 pm: $\frac{P_{\mbox{loss}}}{P_\mbox{{initial}}}} \times 100$
Title: Re: Efficiency
Post by: /0 on August 11, 2009, 09:46:34 pm: I thought $P_{output}$ would go on the numerator?
http://www.sei.ie/Schools/Secondary_Schools/Subjects/Physics/Unit_3_-_Power/Percentage_Efficiency/
Title: Re: Efficiency
Post by: TrueTears on August 11, 2009, 09:47:44 pm: Assuming ideal transformer.
Title: Re: Efficiency
Post by: NE2000 on August 12, 2009, 04:28:27 pm: Quote from: /0 on August 11, 2009, 09:46:34 pm
I thought $P_{output}$ would go on the numerator?
http://www.sei.ie/Schools/Secondary_Schools/Subjects/Physics/Unit_3_-_Power/Percentage_Efficiency/

That's what I think as well. The point of an efficiency % is that it gets higher as the system gets more efficient.