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UP polytechnic Lecturer (EE) Quiz 16
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Question 1
Which of the following regions of operation are mainly responsible for heating of the transistor under switching operation?
1) Saturation region
2) Cut-off region
3) Transition from saturation to cut-off
4) Transition from cut-off to saturation
Select the correct answer using the codes given below
1) Saturation region
2) Cut-off region
3) Transition from saturation to cut-off
4) Transition from cut-off to saturation
Select the correct answer using the codes given below
Question 2
In the circuit shown, an ideal germanium diode is in series with 0.7V dc source with forward resistance. What will be the output voltage of Germanium diode in negative half cycle, if diode is having forward resistance rf of 25 ohms?
Question 3
In the BJT circuit below, assume 
and CE current gain 
very large. Then the collector to base voltage 
______V
and CE current gain very large. Then the collector to base voltage ______V
Question 4
Consider the following statements regarding Wien Bridge oscillator:
1) It has a larger bandwidth than the phase shift oscillator.
2) It has a smaller bandwidth than the phase shift oscillator.
3) It has 2 capacitors while the phase shift oscillator has 3 capacitors.
4) It has 3 capacitors while the phase shift oscillator has 2 capacitors.
Which of the above statements are correct?
1) It has a larger bandwidth than the phase shift oscillator.
2) It has a smaller bandwidth than the phase shift oscillator.
3) It has 2 capacitors while the phase shift oscillator has 3 capacitors.
4) It has 3 capacitors while the phase shift oscillator has 2 capacitors.
Which of the above statements are correct?
Question 5
An opamp has the DC gain = 
and the cutoff frequency of 50 Hz. What will be the gain of the opamap at a frequency of 1000 Hz (1 kHz)?
Question 6
Consider the following statements regarding linear power supply:
1) It requires low frequency transformer.
2) It requires high frequency transformer.
3) The transistor works in active region.
Which of the above statements is/are correct?
1) It requires low frequency transformer.
2) It requires high frequency transformer.
3) The transistor works in active region.
Which of the above statements is/are correct?
Question 7
A full wave rectifier uses diode of internal resistance 10 Ω and load resistance 990 Ω. If the secondary voltage with respect to counter tapped is 50 V RMS with an AC supply frequency of 50 Hz then the DC and RMS load current will be equal to respectively?
Question 8
In the circuit shown, zener diode has breakdown voltage equal to 3.3 volt while internal resistance of 0 Ω. The current through zener diode will be
Question 9
What is the frequency of oscillation for an RC phase-shift oscillator with R of 10 k and
C of 0.001 μF in each of its three RC sections?
C of 0.001 μF in each of its three RC sections?
Question 10
Two diodes are oppositely connected in a circuit as shown. What will be the value of the current flowing through the 12 V battery in the circuit? THE cut-in voltage of diodes are 0.7 V
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AE & JE ExamsJul 14AE & JE Exams
