Chapter3- Feedback amplifiers MCQ questions with answer

 Feedback is the process of giving back fraction of output back to the input.

a)      True

b)      False

 

Voltage series, voltage shunt, current series and current shunt feedback amplifiers are the types of positive feedback

a)      True

b)      False

 

Feedback is used for controlling action

a)      True

b)      False

 

Positive feedback improves stability of circuit

a)      True

b)      False

 

In positive feedback, feedback signal is -------------------

a)      Absent

b)      In phase

c)       Out of phase

d)      None of above

 

In positive and negative feedback total phase shift in the circuit is-------------- and -------------- respectively.

a)      0 degree and 360 degree

b)      360 degree and 180 degree

c)       90 degree and 180 degree

d)      None of above

 

In negative feedback, bandwidth -----------------

a)      Decreases

b)      Remains constant

c)       Is limited

d)      Increases

 

Positive feedback is used in amplifiers

a)      True

b)      False

 

In current shunt negative feedback, output of amplifier is taken in__________ and given to feedback network

a)      series

b)      parallel

c)       feedback

d)      none of above

 

Negative feedback is used in___________ circuit.

a)      Hartley oscillator

b)      amplifier

c)       colpitts oscillator

d)      all of above

 

Positive feedback results in a feedback amplifier having closed loop gain _______ open loop gain which leads to instability of circuit.

a)      greater than

b)      less than

c)       equals to

d)      none of above

 

positive feedback is also called as ___________

a)      regenerative feedback

b)      degenerative feedback

c)       indirect feedback

d)      none of above