Q.1.
What is the frequency of oscillation of wein bridge oscillator?
- a) fo = 1/(2πRC)
- b) fo = 2π/RC
- c) fo = RC/2π
- d) fo = 2πRC
Q.2.
Sustained oscillation in wein bridge oscillator is possible when the value of ß is
- a) 3
- b) 1/3
- c) 1
- d) None of the mentioned
Q.3.
Determine the value of fo, ß and Rf from the following circuit diagram.
- a) fo = 80Hz, ß = 0.162 and Rf = 7kΩ
- b) fo = 100Hz, ß = 1.62 and Rf = 7kΩ
- c) fo = 60Hz, ß = 0.0162 and Rf = 7kΩ
- d) fo = 120Hz, ß = 16.2 and Rf = 7kΩ
Q.4.
What is the problem faced by the wein bridge oscillator?
- a) Output sinewave get clipped
- b) Output sinewave remain constant without growing
- c) Output sinewave keep on decreasing and die out
- d) All of the mentioned
Q.5.
Find the type of oscillator shown in the diagram
- a) Quadrature oscillator
- b) Biphasic oscillator
- c) RC phase shit oscillator
- d) None of the mentioned
Q.6.
Calculate the value of capacitance in wein bridge oscillator, such that fo =1755Hz and R=3.3kΩ.
- a) 2.7µF
- b) 0.91µF
- c) 0.03µF
- d) 0.05µF
Q.7.
Quadrature oscillators have signals with
- a) Different frequency
- b) Same frequency
- c) Opposite frequency
- d) Parallel frequency
Q.8.
Which of the following component is not used for audio frequency?
- a) RC oscillator
- b) Wein bridge oscillator
- c) LC oscillator
- d) None of the mentioned
Q.9.
If the resistor and capacitor values are same in Quadrature oscillator. Find its frequency of oscillation for R=50kΩ and C=0.01µF.
- a) 112Hz
- b) 275Hz
- c) 159Hz
- d) 318Hz
Q.10.
What is the possible method used in Quadrature oscillator to remove distortion from the output waveform?
- a) Replace the resistor at the input of non-inverting type amplifier with a potentiometer
- b) Replace the resistor at the output of non-inverting type amplifier with a potentiometer
- c) Replace the resistor at the input of inverting type amplifier with a potentiometer
- d) None of the mentioned