| 1. |
_____________ is a waveform that undergoes a pattern of changes, returns to its original pattern, and then repeats the same pattern of changes. |
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Periodic wave |
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Wavelength |
| 2. |
Damped wave is a sinusoidal wave in which the amplitude steadily decreases with time. |
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True |
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False |
| 3. |
___________ is defined as the opposition to the flow of an alternating current (expressed in ohms) caused by the inductance of a circuit. |
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Inductive Reactance |
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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. |
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Resonance |
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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. |
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True |
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False |
| 6. |
Amplitude stability refers to the ability of the oscillator to maintain a constant amplitude in the output waveform. |
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True |
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False |
| 7. |
_______________ is the ability of a circuit to discriminate between frequencies. |
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Selectivity |
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Shaping Circuit |
| 8. |
______________ is the range of frequencies included between upper and lower frequencies. |
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Bandwidth |
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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. |
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True |
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False |
| 10. |
The opposition, expressed in ohms, offered to the flow of an alternating current by capacitance is _______________. |
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Capacitive Reactance |
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Complex Wave |
| 11. |
______________ is a circuit in which either the upper or lower extremity of a waveform is fixed at a desired value. |
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Clamper |
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Counter |
| 12. |
Short pulse, either positive or negative that can be used to cause an electrical function to take place is called _______________. |
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Trigger |
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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. |
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True |
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False |
| 14. |
Natural frequency is called as: |
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Resonant frequency |
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Parallel Resonance |
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Damped wave |
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None of the above |
| 15. |
Filter circuits may be divided into some general types. They are: |
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Low-pass filters |
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High-pass filters |
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Band-pass filters |
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Band-reject filters |
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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 ______________. |
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Discrimination |
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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. |
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True |
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False |
| 18. |
The ________________ of an oscillator is a measure of the degree to which a constant frequency output is approached. |
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Frequency stability |
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Amplitude stability |
| 19. |
The _________________ is used to produce a sine-wave output of constant amplitude and of fairly constant frequency within the rf range. |
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Armstrong oscillator |
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Feedback network |
| 20. |
Network of resistors, inductors, and/or capacitors, which offer opposition to certain frequencies, are called ________________. |
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Filter circuits |
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Electro-magnetic circuits |
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