1. Name the two basic classifications of oscillator circuits.

    a.  LC

    b.  RC

2. What are the frequency determining components in an LC

    oscillator circuit?

    a. transistor and capacitor

    b. resistor and capacitor

    c. resistor and coil

    d. capacitor and coil     answer

3. What are the frequency determining components in an RC

    oscillator circuit?

    a. transistor and capacitor

    b. resistor and capacitor      answer

    c. resistor and coil

    d. capacitor and coil

4. Name the three basic operating principles in a resonant circuit.

    a. feedback

    b. sufficient strength

    c. correct phase

5. What would be the effect on an oscillator circuit if the feedback

    signal was 180 degrees our of phase?

If the feed back is reversed, the oscillation will stop and the gain of the circuit will be reduced.

6. For proper operation, the oscillator circuit requires

    a. positive feedback      answer 

    b. negative feedback

    c. a coil

7. Negative feedback is commonly used in

    a. oscillators

    b. amplifiers    answer

    c. timer circuits

8. What is the primary function of an LC tank circuit?

To generate a high frequency AC signal

9. Current flows in a tank circuit in one direction only. True or

    False?  False

10. State the formula used to determine frequency.

F = 1/T where F is frequency and T is time in seconds

11. What three factors should you know when working with

      resonant circuits?

      a. frequency

      b. number of cycles in the damped waveform

      c. period

12. What causes a damped waveform?

It is due to the losses in the coil and capacitor in the LC tank circuit

13. When does resonance occur in an LC circuit?

When the inductive reactance of the coil equals the capacitive reactance of the capacitor, or when XL = Xc

14. State the formula used to determine resonant frequency.

F⁰ = 1/2p(LC)^1/2

15. Increasing the value of the inductor or capacitor in a resonant

      frequency circuit will

      a. increase the frequency

      b. decrease the frequency      answer

      c. have no effect on the frequency

16. What is the period of a resonant frequency?

The time required for the resonant circuit to go through one complete cycle of oscillation

17. State the formula used to determine the period of a resonant

      frequency.

P = 1/F where P is the period and F is the frequency

18. What does the Q of a coil indicate?

Indicates the ratio of inductive reactance of the circuit at the resonant frequency, to its radio frequency resistance. If the Q factor is high, the voltages at the tuned circuit will be high. A high Q factor will also produce a much narrower bandwidth.