What Is the Approximate RMS Voltage of a Sinusoidal Wave?

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Homework Help Overview

The discussion revolves around calculating the approximate RMS voltage of a sinusoidal wave based on provided measurements from a waveform. Participants are exploring the relationship between peak voltage and RMS voltage in the context of alternating current.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are attempting to understand how to derive RMS voltage from given waveform measurements, specifically questioning the significance of peak voltage (Vp) and its relation to RMS voltage. Some are seeking clarification on the definitions and calculations involved.

Discussion Status

The discussion is ongoing with multiple participants expressing uncertainty about the RMS calculation. Some guidance has been offered regarding the use of peak-to-peak voltage (Vpp) and its relationship to RMS, but no consensus has been reached on the specific calculations or definitions.

Contextual Notes

Participants are working with specific measurements from a waveform, including time and voltage divisions, but there may be assumptions or missing information regarding the waveform's characteristics that could affect the calculations.

Rasine
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alternating current wave prob...

assume the wave is sinusoidal. suppose that each horizontal division (13) represents 1.0 ns and that each vertical division (11) represents 1 mV. what is the approx. rms voltage?

please help me solve this.

i am not so sure how to find rms, and if you do please explain it.

thank you.
 
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Rasine said:
assume the wave is sinusoidal. suppose that each horizontal division (13) represents 1.0 ns and that each vertical division (11) represents 1 mV. what is the approx. rms voltage?

please help me solve this.

i am not so sure how to find rms, and if you do please explain it.

thank you.

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/acres.html#c2

Look at the example for RMS current.

Zz.
 
Rasine said:
assume the wave is sinusoidal. suppose that each horizontal division (13) represents 1.0 ns and that each vertical division (11) represents 1 mV. what is the approx. rms voltage?

please help me solve this.

i am not so sure how to find rms, and if you do please explain it.

thank you.
Were you trying to post some waveform? 11/13/etc. Whatever. If you want the RMS, just use the Vpp measurement to get you there. Vp= sqrt(2)*Vrms, Vpp = 2*sqrt(2)(Vrms)


EDIT -- If you want a more complete explanation of RMS versus Vpp, we can oblige.
 
what is the Vp measurement? and how does it related to rms?
 

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