Question: Quartz crystal is most commonly used in crystal oscillators because:____________?

• 1. It has superior electrical properties
• 2. It is easily available
• 3. It is quite inexpensive
• 4. None of the above

Question: The signal generator generally used in the laboratories is___________oscillator?

• 1. Wien-bridge
• 2. Hartely
• 3. Crystal
• 4. Phase shift

Question: In an LC oscillator, if the value of L is increased four times, the frequency of oscillations is __________?

• 1. Increased 2 times
• 2. Decreased 4 times
• 3. Increased 4 times
• 4. Decreased 2 times

Question: In Colpitt’s oscillator, feedback is obtained___________?

• 1. By magnetic induction
• 2. By a tickler coil
• 3. From the centre of split capacitors
• 4. None of the above

Question: For an oscillator to properly start, the gain around the feedback loop must initially be_________?

• 1. 1
• 2. Greater than 1
• 3. Less than 1
• 4. Equal to attenuation of feedback circuit

Question: One condition for oscillation is_____________?

• 1. A phase shift around the feedback loop of 180o
• 2. A gain around the feedback loop of one-third
• 3. A phase shift around the feedback loop of 0o
• 4. A gain around the feedback loop of less than 1

Question: The crystal oscillator frequency is very stable due to___________of the crystal?

• 1. Rigidity
• 2. Vibrations
• 3. Low Q
• 4. High Q

Question: In a phase shift oscillator, the frequency determining elements are _______________?

• 1. L and C
• 2. R, L and C
• 3. R and C
• 4. None of the above

Question: Hartley oscillator is commonly used in______________?

• 1. Radio receivers
• 2. Radio transmitters
• 3. TV receivers
• 4. None of the above

Question: In an LC oscillator, the frequency of oscillator is____________L or C?

• 1. Proportional to square of
• 2. Directly proportional to
• 3. Independent of the values of
• 4. Inversely proportional to square root of