Calculating Currents & Voltages of an RLC Circuit

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In an RLC circuit with a 15Ω resistor, 200μF capacitor, and 12mH inductor, the current through each component is 1.75A⋅cos(250πt). The voltage across the power source is calculated to be 26.79V⋅cos(250πt+0.201). The voltage across the resistor is 26.25V⋅cos(250πt), while the capacitor has a voltage of 11.14V⋅cos(250πt-(π/2)). The inductor's voltage is 16.49V⋅cos(250πt+(π/2)). The calculations confirm the expected relationships between current and voltage in the circuit.
Chemmjr18
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Homework Statement


An RLC circuit contains the following components in series: a 15Ω resistor, a 200μF capacitor, and a 12mH inductor. What are the currents and voltages through each component?

It's known that the current through the resistor is 1.75A⋅cos(250πt)

Homework Equations


χL=ω*L
χC=1/(ωC)
Z=√(R2+(χLC)2)
φ=tan-1((χLC)/R)
Vi=Ii*Z

The Attempt at a Solution


This what I got when solving:

The current through each component is the same. I=1.75A⋅cos(250πt)

The voltage across the power source is V=26.79V⋅cos(250πt+0.201)

The voltage across the resistor is V=26.25V⋅cos(250πt)

The voltage across the capacitor is V=11.14⋅cos(250πt-(π/2))

The voltage across the inductor is V=16.49⋅cos(250πt+(π/2))
 
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I got the same thing.
 
Last edited:
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scottdave said:
I gotthe same thing.
Victory! Thanks!
 
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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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