[Free] IIT JAM Physics Test Series 2023 : Electronics – (Operational Amplifier)

Are you preparing for IIT JAM Physics 2023, then ExamFlame brings Chapter-wise or Unit-wise IIT JAM Physics Test Series which are totally Free for you. This Test Series is available only on our Website www.examflame.com , you do not have to pay a single penny for it and also it will be always available free here. Through this Test Series Candidates can enhance their preparation and score a very good marks in the final Exam.

In this Test Series you will surely get Unit-wise/Topic-wise Test of Every Chapter For IIT JAM Physics. Practice this test Series completely which strictly obeying the Latest Syllabus of IIT JAM Physics 2023. After completing this Test Series , you will feel More Confident about your Exam. If you find any Question or Answer Wrong then feel free to Correct Us and also have any doubt , let us know in the comment section Below.

IMG 20220806 002517 137 compress65

Now In this Post of IIT JAM Physics Test Series, you will get a test of the topic Operational Amplifier of Chapter Electronics. There are total 15 Questions given below also Answers are attached at the end of the test so that you can verify your answers after completing the test. So, Practice these Questions and Do your Best. Also Solve IIT JAM Physics Previous Year Question Paper. And Don’t Forget to Share with Your Friends.


[Free] IIT JAM Physics Test Series 2023 : Electronics – (Operational Amplifier)


Q1. An amplifier has a voltage gain Av = 1000, input impedance 1 KΩ and output impedance 500 Ω A fraction βv = 0.1 of the output voltage is fed back in the serie in opposition to the input voltage. The input and output impedance after the feedback are given respectively by the approximate values.

(a) 100 kΩ and 5 Ω
(b) 1 kΩ and 5 Ω
(c) 10 Ω and 50 Ω
(d) 100 Ω and 100 Ω


Q2. An amplifier of gain 1000 is made into a feedback amplifier by feeding 9.9% of its output voltage in series with the input opposing. If fL = 20 Hz and fH = 200 kHz for the amplifier without feedback, then due to the feedback.

(a) The gain decreasse by 10 times
(b) The outputresistance increases by 10 times
(c) The fH increases by 100 times
(d) The input resistance decreases by 100 times.


Q3. An amplifier has a 40 dB gain. Its gain may change by 10% due to change in its parameters. Negative feedback is used to reduce this change only to 1%. Then the value of feedback factor β is

(a) β = 0.1
(b) β = 10
(C) β = 0.09
(d) β = 0.001


Q4. The input impedance of an amplifier increases by the introduction of feedback. It is due to :

(a) positive feedback
(b) current series negative feedback
(c) current shunt negative feedback
(d) voltage shunt negative feedback


Q5. In a RC coupled amplifier, the reduction in voltage gain in the high frequency range results due to:

(a) coupling capacitor
(b) shunt capacitance in the circuit
(c) series capacitance in the circuit
(d) bypass capacitor in the inner circuit


Q6. In a amplifier the negative feedback is a process where a portion of output signal is fed to the input of the normal amplifier with the condition that the input signal is:

(a) in phase
(b) 90° out of phase
(c) 180° out of phase
(d) any arbitrary phase


Q7. Which oscillator is characterized by a split capacitor in its tank circuit?

(a) RC phase shift oscillator
(b) Colpitts oscillator 
(c) Wien bridge oscillator 
(d) None of the above 


Q8. In which type of power amplifier does the output current flow for the entire cycle of input signal?

(a) Class C
(b) Class AB
(c) Class B
(d) Class A


Q9. In an amplifier with the negative feedback, bandwidth is _________ and voltage gain is _________.

(a) Bandwidth is decreased by a factor (1+Aβ) and voltage gain decreases
(b) Bandwidth is decreased by factor β and voltage gain remains same
(c) Bandwidth is increased by the factor (1+Aβ) and voltage gain is reduced
(d) Bandwidth remains the same and voltage gain increases


Q10. The crystal oscillator is a constant frequency oscillator due to:

(a) Rigidity
(a) Vibrations
(c) Low Q
(d) High Q


Q11. A Series-Series feedback amplifier is

(a) Voltage amplifier
(b) Current amplifier
(c) Transresistance
(d) Transconductance


Q12. The value of C required for sinusoidal oscillation of frequency = 2 kHz in the given circuit is:

(a) 1/2πμF
(b) 1/4πμF
(c) 1/πμF
(d) None of these


Q13. The frequency of oscillation of a tuned-collector oscillator having L = 30 μH and C = 300 pF is nearby

(a) 267 kHz
(b) 1677 kHz
(c) 1.68 kHz
(d) 2.67 MHz


Q14. Another name for a unity gain amplifier is

(a) Difference amplifier
(b) Comparator
(c) Single ended
(d) Voltage follower


Q15. Which of the following is correct about the gain (in dB) of a cascade amplifier?

(a) Total gain is a sum of individual gains
(b) Total gain is a product of voltage and current gains
(c) Total gain is a product of individual gains
(d) Total gain is a ratio of individual gains

NOTE : – If you need anything else more like e-books, video lectures, syllabus  etc regarding  your Preparation / Examination  then do 📌 mention in the Comment Section below

Hope you like the test given above for IIT JAM Physics 2023 of Topic – Thermal Properties of the Chapter Electronics . To get more Information about any exam, Previous Question Papers , Study Material, Book PDF, Notes etc for free, do share the post with your friends and Follow and Join us on other Platforms links are given below to get more interesting information, materials like this.

Answer Key (if you find any answer wrong, feel free to Correct us)

01.(a)06.(c)11.(d)
02.(c)07.(b)12.(d)
03.(c)08.(d)13.(b)
04.(b)09.(c)14.(d)
05.(a)10.(d)15.(a)

Important Searches & Tags

  • iit jam physics test series pdf
  • iit jam physics test series free
  • physics test series unacademy
  • iit jam physics test series
  • iit jam mock test 2022 best test series for iit jam physics
  • physics by fiziks test series
  • iit jam test series free
  • ExamFlame iit jam Physics Test Series

Leave a Comment

close