Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

Chapter 21 AC circuits for Physics 212

Instantaneous (AC)

Peak Velocity times Sine 2 pie Frequency Time
(V = V₀ × Sin 2πƒt)

Current RMS

Voltage divided by Resistance
(I = V÷R)

Voltage RMS

.707 Peak Voltage
(V = V₀÷√2)
(V ≈ .707×V₀)

Average Power in an AC circuit

Voltage squarred divided by Resitance
(P = V²÷R)
(P = I²×R)

Capacitive Reactance

1 divided by 2 pie frequency capacitance
(Xc = 1 ÷ 2πƒC)

Inductive Reactance

2 pie frequency L
(XL = 2πƒL)

Ohm's law Resistor

Velocity divided by Current
(R = V÷I)

Ohm's law Capacitor

Voltage divided by Current
(Xc = V÷I)

Ohm's law Inductor

Voltage divided by Current
(XL = V÷I)

Ohm's law Generalized to AC circuits

Ohm's law Generalized to AC circuits

Impedance for a series RLC circuit

Square Root of paranthesis Restitance squared + paranthesis Inductive Reactance - Capacitive Reactance end paranthesis squared
(Z=√(R²+ (XL-Xc)²)

Phase angle between voltage and current in a series RLC circuit

Tangent Theta = Inductive Reactance - Capacitive Reactance divided by Resistance

Power factor for an RLC circuit

Cosine Theta = Resitance divided by Impedance

Average power in terms of power factor

Current RMS Voltage RMS Cosine Theta

Resonance frequency of a series RLC circuit

1 over 2 pie Square Root L Current

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording