NEETS MODULE 9 CHAPTER 1 TUNED CIRCUITS
Q-1. What is the relationship between frequency and the values of (a) XL, (b) XC, and (c) R?
Q-2. In an a.c. circuit that contains both an inductor and a capacitor, what term is used for thedifference between the individual reactances?
Q-3. State the formula for resonant frequency
Q-4. If the inductor and capacitor values are increased, what happens to the resonant frequency
Q-5. In an "ideal" resonant circuit, what is the relationship between impedance and current?
Q-6. In a series-RLC circuit, what is the condition of the circuit if there is high impedance, lowcurrent, and low reactance voltages?
Q-7. When the capacitor is completely discharged, where is the energy of the tank circuit stored?
Q-8. When the magnetic field of the inductor is completely collapsed, where is the energy of the tankcircuit stored?
Q-9. What is the term for the number of times per second that tank circuit energy is either stored in theinductor or capacitor?
Q-10. In a parallel-resonant circuit, what is the relationship between impedance and current?
Q-11. When is line current minimum in a parallel-LC circuit?
Q-12. What is the relationship of the coil to the resistance of a circuit with high "Q"?
Q-13. What is the band of frequencies called that is included between the two points at which currentfalls to 70 percent of its maximum value in a resonant circuit?
Q-14. What is the device called that will separate alternating current from direct current, or that willseparate alternating current of one frequency from other alternating currents of differentfrequencies?
Q-15. What are the four general types of filters?
Q-16. What is the filter called in which the low frequencies do not produce a useful voltage?
Q-17. What is the filter called that passes low frequencies but rejects or attenuates high frequencies?
Q-18. How does a capacitor and an inductor react to (a) low frequency and (b) high frequency?
Q-19. What term is used to describe the frequency at which the filter circuit changes from the point ofrejecting the unwanted frequencies to the point of passing the desired frequencies?
Q-20. What type filter is used to allow a narrow band of frequencies to pass through a circuit andattenuate all other frequencies above or below the desired band?
Q-21. What type filter is used to block the passage of current for a narrow band of frequencies, whileallowing current to flow at all frequencies above or below this band?
NEETS MODULE 9 CHAPTER 2 OSCILLATORS
Q-1. What are the two classifications of wave generators according to their output waveshapes?
Q-2. What are the three networks used for frequency-determining devices?
Q-3. What is another name for nonsinusoidal oscillators?
Q-4. What is a nonrotating device that produces alternating current?
Q-5. What are the three requirements necessary for oscillations to exist in a circuit?
Q-6. What type of feedback aids an input signal?
Q-7. What are the two methods used for feedback coupling?
Q-8. Which oscillator uses a tickler coil for feedback?
Q-9. Which oscillator uses a tapped inductor for feedback?
Q-10. Which oscillator uses tapped capacitors for feedback?
Q-11. What are the three basic configurations of transistor oscillators?
Q-12. What is the main difference between the Armstrong oscillator and the Hartley oscillator?
Q-13. What is the difference between the series-fed and the shunt-fed Hartley oscillator?
Q-14. What is the identifying feature of a Colpitts oscillator?
Q-15. Which components provide the regenerative feedback signal in the phase-shift oscillator?
Q-16. Why is a high-gain transistor used in the phase-shift oscillator?
Q-17. Which RC network provides better frequency stability, three-section or four-section?
Q-18. What is the impedance of a crystal at its resonant frequency when it is used in the parallel mode?
Q-19. What is the impedance of a crystal at its resonant frequency when it is used in the series mode?
Q-20. Oscillators that are turned on and off at a specific time are known as what type of oscillators?
Q-21. What is the polarity of the first alternation of the tank circuit in an emitter-loaded npn pulsedoscillator?
Q-22. What is the frequency that is twice the fundamental frequency?
Q-23. What is the purpose of the buffer amplifier?
NEETS MODULE 9 CHAPTER 3 WAVEFORMS AND WAVE GENERATORS
Q1. What type circuit is used to produce square or rectangular waves?
Q2. What type of multivibrator does not have a stable state?
Q3. What type of multvibrator has one stable state?
Q4. What type of multivibrator has two stable states?
Q5. In an astable multivibrator, which components determine the pulse repetition frequency?
Q6. What is another name for the monostable multivibrator?
Q7. In a bistable multivibrator, how many trigger pulses are needed to produce one complete cycle inthe output?
Q8. How many stable states are there for a flip-flop?
Q9. If a voltage (positive or negative) is measured on the "1" output of a flip-flop, what state is it in?
Q10. What component in a blocking oscillator controls pulse width?
Q11. For an RC circuit to produce a linear output across the capacitor, the voltage across thecapacitor may not exceed what percent of the applied voltage?
Q12. Increasing gate length in a sawtooth generator does what to linearity?
Q13. In a sawtooth generator, why is the transistor turned on for a longer time than the discharge timeof the RC network?
Q14. What is added to a sawtooth generator to produce a trapezoidal wave?
NEETS MODULE 0 CHAPTER 4 WAVE SHAPING
Q1. Which portion of a sine-wave input is retained in the output of a series-positive limiter?
Q2. Which portion of a sine-wave input is retained in the output of a series-negative limiter?
Q3. How can a series-positive limiter be modified to limit unwanted negative portions of the inputsignal?
Q4. What component is in parallel with the output in a parallel limiter?
Q5. What is the condition of the diode in a series limiter when an output is developed? In a parallellimiter?
Q6. What is the relative length of the time constant for the diode-capacitor combination in a damper(long or short)?
Q7. What is the relative length of the discharge time constant with respect to the charge time constantof a damper (long or short)?
Q8. A positive damper clamps which extremity of the output signal to 0 volts?
Q9. To which polarity does a positive damper with positive bins clamp the most negative extremity ofthe output waveform (positive or negative)?
Q10. What type damper (with bias) clamps the most negative extremity of the output waveform to anegative potential?
Q11. A negative damper damps which extremity of the output waveshape to 0 volts?
Q12. A negative damper with negative bias clamps the most positive extremity of the output waveshape to what polarity (positive or negative)?
Q13. What type of bias (positive or negative) is added to a negative damper for the most positiveextremity of the wave shape to be clamped above 0 volts?
Q14. What would be the output of a negative clamper with a bias potential of −5 volts and an inputvoltage swing from +50 to −50 volts?
Q15. What is the harmonic composition of a square wave?
Q16. What is the peaked wave composed of?
Q17. What is the fundamental difference between the phase relationship of the harmonics of the squarewave as compared to the harmonics of a peaked wave?
Q18. What are the requirements for an integration circuit?
Q19. Can a pure sine wave be integrated? Why?
Q20. What characteristic of an RL circuit allows it to act as an integrator?
Q21. What is the numerical difference (in terms of the time constant) between a long and a short timeconstantcircuit?
Q22. What would happen to the integrator output if the capacitor were made extremely large (all otherfactors remaining the same)?
Q23. What is the difference between an RC and an RL differentiator in terms of where the output isdeveloped?
Q24. Name a common application of counting circuits.
Q25. What establishes the value of the current that flows in the output of figure 4-43?
Q26. What is the purpose of D1 in figure 4-43?
Q27. What is the difference between a positive counter and a step counter?
This content is neither created nor endorsed by Google.