Discover the Analytical Calculation for RMS Voltage from v(t) = Vm cos(wt+theta)

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SUMMARY

The discussion centers on deriving the RMS (Root Mean Square) voltage from the equation v(t) = Vm cos(wt + theta). The analytical calculation confirms that the RMS value is v(RMS) = Vm/sqrt(2) for any angular frequency (w) or phase shift (theta). Participants emphasize the importance of integrating the square of the function over one complete cycle to arrive at this result, referencing the integral method as a crucial step in the derivation.

PREREQUISITES
  • Understanding of trigonometric functions and their properties
  • Familiarity with calculus, specifically integration techniques
  • Knowledge of the concept of Root Mean Square (RMS)
  • Basic grasp of electrical engineering principles related to voltage
NEXT STEPS
  • Study the process of integrating periodic functions to find RMS values
  • Learn about the implications of RMS voltage in AC circuit analysis
  • Explore the relationship between RMS voltage and peak voltage in sinusoidal signals
  • Investigate advanced topics in Fourier analysis for more complex waveforms
USEFUL FOR

Electrical engineers, physics students, and anyone involved in signal processing or AC circuit design will benefit from this discussion on RMS voltage calculations.

blanik
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The question is "starting from v(t) = Vm cos(wt+theta), show analytically that the RMS value of v(t) is v(t)=Vm/sqrt(2) for any w or theta."

I'm not really sure how to begin this. Do I start by taking the integral?
 
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