# 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