Terminology
RC Circuits
I SPY a triangle
What's the frequency, Kenneth?
Variety Puzzles
100
This term refers to voltage or current that is sinusoidal
What is ALTERNATING?
100
The energy stored by the capacitor at time t=0+if R = 1000 Ω and C = 1 μ F
What is 50 J?
100
The voltage at V-
What is 0 VDC?
100
In a purely resistive circuit, this is the phase difference between voltage and current phasors.
What is ZERO DEGREES?
100
It's the type of frequency filter shown by this Bode plot.
What is HIGH PASS?
200
This term describes the range of frequencies within a signal that contains most of its energy.
What is BANDWIDTH?
200
The current through this capacitor at time t=0+ if R = 1000 Omega and C = 1 mu F
What is zero amps?
200
It's the gain of this circuit in terms of Ri and Rf
What is
- R_f/R_i
?
200
It's the approximate gain (in decibels) of a first order filter system at the frequency where Vout = 0.707*Vin.
What is -3 dB?
200
It's the slope of the low frequency magnitude response of this Bode plot.
What is 20 dB per decade?
300
This type of filter only allows frequencies below a certain cutoff to pass through.
What is a LOW-PASS FILTER?
300
The voltage across the capacitor at time t=0+
What is 2VDC?
300
It's the approximate value of Vout at very high frequencies
What is zero?
300
It's the approximate cutoff frequency of this filter, and how you know this
What is fc = 1 Hz, because that's where the Bode plot magnitude is -3 dB?
300
It's the type of frequency filter shown here.
What is HIGH PASS?
400
The special name for the frequency at which the output voltage of a filter is 0.707 of the input voltage.
What is the CUTOFF FREQUENCY?
400
It's the time constant of this circuit
What is 20 ms?
400
It's the type of filter represented by this circuit, and how you know that
What is low pass filter, because at low frequencies the capacitor acts like an open and therefore Vout/Vin = -Rf/Ri?
400
In a first-order low-pass filter circuit, this component's impedance decreases as frequency increases, causing high frequencies to be attenuated.
What is the CAPACITOR?
400
It's the complex impedance of this element.
What is Z = 1/(j*2pi*f*C) ?
500
This mathematical tool transforms time-domain sinusoidal functions into the frequency domain for easier analysis.
What are PHASORS?
500
The voltage across the capacitor at t=50,000 ms
What is 8V?
500
it's the expression for the cutoff frequency of this filter circuit
What is
1/(2*pi*R_i*C) ?
500
It's the type of filter this equation represents, and how you know this.
What is LOW PASS, because Vout/Vin is close to 1 at low frequencies and approaches zero at high frequencies?
500
It's the complex impedance of this element.
What is j*2pi*L ?