Voltage and Current
What is the equation for instantaneous voltage AND instantaneous current?
v = V(max)sin(wt)
i = I(max)sin(wt)
What is the purpose of a phase shift diagram?
To easily see and understand the relationships among the current and voltages in a resistor, capacitor, and inductor.
What is the symbol for impedance and what are its units?
ohms
What is the purpose of a filter?
A filtered circuit smooths out/eliminates time-varying signals, aka "ripples"
343 m/s
What does 'rms' signify and what are Vrms and Irms equal to?
"Root mean square," signifying the average value of each respective value.
Vrms = 0.707*Vmax
Irms = 0.707*Imax
What is the phase shift between voltage (through a resistor) and current?
0
What is the impedance equation?
Z = sqrt(R^2+(XL-Xc)^2)
Designed to pass high frequency signals in an AC circuit and block lower frequency signals. Used to pass high frequencies in order to utilize maximum amount of voltage and therefore power.
Where is A$AP Rocky from?
Harlem, New York
When an inductor is present in a circuit, what equal relates Vmax and Imax?
Vmax = Imax * XL (XL = wL, inductive reactance)
What are the phase shifts for when an inductor is present and for when a capacitor is present in an AC circuit?
+pi/2
-pi/2
When it is useful to utilize the impedance in a circuit?
When provided an RLC circuit, Vmax = Imax*Z
What is a low-pass filter and what is its purpose in an AC circuit?
How many ridges does a dime have around its edges?
118
When a capacitor is present in a circuit, how are Imax and Vmax related?
Vmax = Imax *Xc (Xc = 1/wC, capacitive inductance)
If provided a graph comparing the current and voltage in a circuit, what values can be determined?
Imax, Vmax, Irms, Vrms,
If someone was to calculate the power in a building, would they want to find the instantaneous power or the average power? Why is one more useful than the other?
Average power because there isn't much of a power to determine the power at a single second, if the power is constantly changing.
The quality factor measures the performance of a capacitor or inductor in terms of its losses and compares the resonance frequency and resonator bandwidth.
How much of Earth's oxygen is provided by the Amazon rainforest?
20%
If a diagram of an RLC circuit with a voltmeter is provided with values dictated per element, how can the maximum voltage be determined?
v = Vmax*sin(wt+pi)
R: pi=0
L: pi=pi/2
C: pi=-pi/2De
What are the three equations in order to determine the average power in an RLC circuit?
P = R*Irms^2
P = (Vrms*cos(pi))^2 / R
P = (Vrms*cos(pi))*Irms
Describe how one can determine whether a circuit requires a high-pass filter or a low-pass filter?
High-Pass: capacitor next to voltmeter, resistor closest to Vout
Low-Pass: resistor next to voltmeter, capacitor closest to Vout
What's my astrological sign?
Aries