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Introduction to Wave-Generation and Wave-Shaping


Quiz Questions

1._____________ is a waveform that undergoes a pattern of changes, returns to its original pattern, and then repeats the same pattern of changes.
Periodic wave
Wavelength
2. Damped wave is a sinusoidal wave in which the amplitude steadily decreases with time.
True
False
3.___________ is defined as the opposition to the flow of an alternating current (expressed in ohms) caused by the inductance of a circuit.
Inductive Reactance
Impedance
4._______________ is the condition in a circuit containing inductance and capacitance in which the inductive reactance is equal and opposite to the capacitive reactance.
Resonance
Regenerator
5.The ability of a filter circuit to reduce the amplitude of unwanted frequencies to a level below that of the desired output frequency is called Buffer.
True
False
6.Amplitude stability refers to the ability of the oscillator to maintain a constant amplitude in the output waveform.
True
False
7._______________ is the ability of a circuit to discriminate between frequencies.
Selectivity
Shaping Circuit
8. ______________ is the range of frequencies included between upper and lower frequencies.
Bandwidth
Wave frequency
9.Multivibrator is a form of relaxation oscillator, which comprises two stages that are coupled so that the input of one is derived from the output of the other.
True
False
10.The opposition, expressed in ohms, offered to the flow of an alternating current by capacitance is _______________.
Capacitive Reactance
Complex Wave
11.______________ is a circuit in which either the upper or lower extremity of a waveform is fixed at a desired value.
Clamper
Counter
12.Short pulse, either positive or negative that can be used to cause an electrical function to take place is called _______________.
Trigger
Tickler coil
13.Tune Constant is time required for an exponential quantity to change by an amount equal to .632 times the total change that can occur.
True
False
14.Natural frequency is called as:
Resonant frequency
Parallel Resonance
Damped wave
None of the above
15.Filter circuits may be divided into some general types. They are:
Low-pass filters
High-pass filters
Band-pass filters
Band-reject filters
All of the above
16.The ability of the filter circuit to distinguish between high and low frequencies and to eliminate or reject the unwanted frequencies is called ______________.
Discrimination
Low-pass filter
17.A band pass filter passes a narrow band of frequencies through a circuit and attenuates all other frequencies that are higher or lower than the desired band of frequencies.
True
False
18. The ________________ of an oscillator is a measure of the degree to which a constant frequency output is approached.
Frequency stability
Amplitude stability
19.The _________________ is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range.
Armstrong oscillator
Feedback network
20.Network of resistors, inductors, and/or capacitors, which offer opposition to certain frequencies, are called ________________.
Filter circuits
Electro-magnetic circuits