Calculate the RMS current of an ac circuit

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SUMMARY

The discussion focuses on calculating the RMS (Root Mean Square) value of an AC current represented by the equation i = 3 + 4 sin(ωt + π/3). The relevant equation for RMS current is Irms² = (∫₀ᵀ [I(t)]² dt) / T. Participants express challenges with integration, particularly with the presence of the T term in the result. The conversation highlights the importance of understanding integration techniques and suggests using LaTeX for clearer communication of mathematical expressions.

PREREQUISITES
  • Understanding of AC circuit theory
  • Familiarity with RMS calculations
  • Basic integration techniques
  • Knowledge of LaTeX for mathematical notation
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  • Study the derivation of RMS values for periodic functions
  • Practice integration of trigonometric functions
  • Learn how to use LaTeX for formatting mathematical equations
  • Explore advanced topics in AC circuit analysis
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Students studying electrical engineering, physics enthusiasts, and anyone looking to deepen their understanding of AC circuit analysis and RMS calculations.

randomgamernerd
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Homework Statement

: [/B]
calculate rms value of current i= 3+ 4 sin(ωt+π/3)

Homework Equations

: [/B]
Irms2=(∫0T [I(t)]2dt)/T

The Attempt at a Solution

: I tried to integrate but I'm getting a T term.
 
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randomgamernerd said:

Homework Statement

: [/B]
calculate rms value of current i= 3+ 4 sin(ωt+π/3)

Homework Equations

: [/B]
Irms2=(∫0T [I(t)]2dt)/T

The Attempt at a Solution

: I tried to integrate but I'm getting a T term.
What result do you get for the integration ?
 
SammyS said:
What result do you get for the integration ?
I don't know how to type it...can I post a picture?
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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