Flashcards
Understanding Waveforms (Mod.6 Sect.2 Part 1)
Cards in this deck (53)
- 1A sine wave is ____ when it has no harmonic frequencies.pure
- 2A _____________ is a multiple frequency of a basic frequency.harmonic frequency
- 3The length of a phasor is always ______ to the maximum voltage.equal
- 4You can lay ____ radians arcs along the circumference of a half circle.pi
- 5pi radians = ____°180
- 6At resonance, inductive reactance ______ capacitive reactance.equals
- 7The action of one body being set into vibration by a second vibrating body with the same natural frequency is called __________ vinration.sympathetic
- 8_________ Resonance - the condition existing in a body when the frequency of an applied vibration equals the natural frequency of the bodyMechanical
- 9An example of mechanical resonance is a _________.tuning fork
- 10When the output signal is used to control the input signal, the system/circuit is called an _______.oscillator
- 11Tuning fork oscillators are used at relatively low frequencies; typically ______ to _____ hertz.400, 1,000
- 12A mechanical oscillator similar to a tuning fork uses a piece of vibrating piezoelectric material, and is usually called a _______ oscillator.crystal
- 13_________ oscillators need higher frequencies due to the thickness of the piezoelectric material.Crystal
- 14Tuning forks and crystal oscillators are both called _______ oscillators.mechanical
- 15Oscillators that don't use vibrations usually use ______ circuits to produce the oscillations and often require bulky components when used to make low frequency signals.LC
- 16Oscillators that use LC circuits to produce vibrations are called ___________ oscillators.electromechanic
- 17There are electric circuit that oscillate at a single frequency known as their _______ frequency.resonant
- 18If there's resistance in a series capacitive/inductive circuit, the phase angle between the V and C is always less than ____º.90
- 19The phasor for Xc (capacitive reactance) is _____.-jXc
- 20The phasor for Xl (inductive reactance) is _____.+jXl
- 21A (+) before a phasor means the voltage _____ the current.leads
- 22A (-) before a phasor means the voltage _____ the current.lags
- 23If L and C are in resonance in an RLC circuit, only ____ controls the circuit current.R
- 24High resistance causes the circuit to tune more ______. (vice versa)broadly
- 25The impedance of a _____ parallel LC circuit is very high.basic
- 26When resistors are connected across a parallel tuned circuit to lower the total Z and purposely get wider frequency response, they're called ________ resistors.swamping
- 27A ______ is a circuit that's designed to eliminate (or greatly reduce) the intensity of an unwanted signal.trap
- 28The resistance in a trap circuit is usually distributed in the ____ and ____ branches.L, C
- 29A parallel trap allows all frequencies to enter the receiver except the undesired frequency, which is the ______ frequency of the trap.resonant
- 30A series trap passes the unwanted frequency to ground; it's also the trap's _______ frequency.resonant
- 31An __________ trap is a trap that absorbs energy from the undesired signal.absorption
- 32In a series-tuned LCR at resonance, the current through the circuit is at ________ and the voltage & impedance are at ________.maximum, minimum
- 33In a parallel-tuned LCR at resonance, the current though the circuit is at ________ and the voltage & impedance are at ______.minimum, maximum
- 34An increase in capacitance ______ the resonant frequency of the circuit. (vice versa)lowers
- 35In a series-resonant RLC circuit, the generator V and C are _____ phase.in
- 36In a series-resonant RLC circuit, impedance is at _________ at resonance.minimum
- 37The expression "basic parallel-resonant circuit" refers to a parallel LC that has no _______ in the reactive branches.resistors
- 38In a basic parallel-resonant circuit, the generator current & voltage are ______ phase.in
- 39In a basic parallel-resonant circuit, the inductive reactance _______ the capacitive reactance.equals
- 40In a basic parallel-resonant circuit, the impedance is _________ at resonance.maximum
- 41Quality factor is represented with the letter ___.Q
- 42The higher the ____ of the inductor and capacitor, the sharper the LC resonant circuit will tune.Q
(quality factor) - 43A pure sine wave has ____ harmonic content.no
- 44A sine wave can be considered to be a waveform generated by a ___________.rotating phasor
- 45A _________ is a mechanical resonant device used for higher output power.tuning fork
- 46What is the name of a drawing that illustrates the amplitudes of the frequencies which pass through a filter circuit?response curve
- 47In a sine wave generated by a rotating phasor the length of the phasor is _______.constant
- 48At resonance the current through a parallel-resonant LC circuit is at _______.minimum
- 49Phasor impedance (z) may be written in what two forms?polar, rectangular
- 50You want to lower the frequency of a series resonant LC circuit, so, you increase the value of ____.L
- 51If you want a narrow bandwidth for a series RLC circuit you need a low value of ____.R
- 52Sharper tuning in a series resonant RLC circuit is obtained with a _____ value of R.lower
- 53Scientifically, the Q of a coil or capacitor is a comparison of the amount of energy______ and the amount of energy ______ in a component.stored, lost
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- Career Diploma Electronics Technician (Module 6 - Basic Electronics (Section 2)) Flashcards on Understanding Waveforms (Mod.6 Sect.2 Part 1), created by That Yeti Dog Person on 09/06/2022.
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