1. The f

Solution: https://www.youtube.com/watch?v=f6J9u_ffd74

2. The circuit of the figure is an example of feedback of the following type

a. Current Series

b. Current Shunt

c. Voltage Series

d. Voltage Shunt

Solution: https://www.youtube.com/watch?v=33433ffJsOw

3. In a differential amplifier, CMRR can be improved by using an increased

a. Emitter resistance

b. Collector resistance

c. Power supply voltages

d. Source resistance

Solution: https://www.youtube.com/watch?v=ThLcF8zCZNg

4. From a measurement of the rise time of the output pulse of an amplifier, whose input is a small amplitude square wave, one can estimate the following parameter of the amplifier

a. Gain-bandwidth product

b. Slew rate

c. Upper 3 dB frequency

d. Lower 3 dB frequency

Solution: https://www.youtube.com/watch?v=1-COkXWLdJ0

5. A distorted sinusoid has the amplitudes A

Solution: https://www.youtube.com/watch?v=jLPkLCkKXRc

6. The emitter coupled pair of BJT’s given a linear transfer relation between the differential output voltage and the differential input voltage V

a. 4

b. 3

c. 2

d. 1

Solution: https://www.youtube.com/watch?v=zF8Td25z8Zs

7. In a Shunt – Shunt negative feedback amplifier, as compared to the basic amplifier

a. Both, input and output impedances decreases

b. Input impedance decreases and output impedance increases

c. Input impedance increases and output impedance decreases

d. Both, input and output impedances increases

Solution: https://www.youtube.com/watch?v=QfHLFEMyOh4

8. A multistage amplifier has a low pass response with three real poles at s = - ω

Solution: https://www.youtube.com/watch?v=6qJInA6Xyu0

9. A high – Q quartz crystal exhibits series resonance at the frequency ω

a. ω

b. ω

c. ω

d. ω

Solution: https://www.youtube.com/watch?v=s6jLBt7qH18

10. One input terminal of high gain comparator circuit is connected to ground and a sinusoidal voltage is applied to the other input. The output of comparator will be

a. A sinusoid

b. A full rectified sinusoid

c. A half rectified sinusoid

d. A square wave

Solution: https://www.youtube.com/watch?v=zlM_LN2n0r4

11. In a series regulated power supply circuit, the voltage gain A

a. A

b. 1 << A

c. A

d. A

Solution: https://www.youtube.com/watch?v=b3wTRqK2kdc

12. For full wave rectification, a four diode bridge rectifier is claimed to have the following advantages over a two diode circuit:

1. Less expensive transformer

2. Smaller size transformer, and

3. Suitability for higher voltage application.

Of these,

a. Only 1 and 2 are true

b. Only 1 and 3 are true

c. Only 2 and 3 true

d. 1, 2 as well as 3 are true

Solution: https://www.youtube.com/watch?v=Vkk-TUzCbJA

13. In the MOSFET amplifier of the figure, the signal output V

Solution: https://www.youtube.com/watch?v=dHIC1z_RdEY

14. For small signal ac operation, a practical forward biased diode can be modeled as

a. Resistance and capacitance in series

b. Ideal diode and resistance in parallel

c. Resistance and ideal diode in series

d. Resistance

Solution: https://www.youtube.com/watch?v=DcIc-DoZIvY

15. For the circuit shown,

a. Draw the transfer characteristics if both diodes D

b. How would the characteristics change, if D

16. Determine the input impedance of the circuit shown and investigate if it can be inductive.

17. Find the value of R’ in the circuit shown for generating sinusoidal oscillations. Find the frequency of oscillations.

18. In the circuit shown, determine the resistance R

19. Implement a monostable multivibrator using the timer circuit shown in figure. Also determine an expression for ON time ‘T’ of the output pulse.

_{τ}of a BJT is related to its g_{m}, C_{π}and C_{µ}as follows2. The circuit of the figure is an example of feedback of the following type

a. Current Series

b. Current Shunt

c. Voltage Series

d. Voltage Shunt

3. In a differential amplifier, CMRR can be improved by using an increased

a. Emitter resistance

b. Collector resistance

c. Power supply voltages

d. Source resistance

4. From a measurement of the rise time of the output pulse of an amplifier, whose input is a small amplitude square wave, one can estimate the following parameter of the amplifier

a. Gain-bandwidth product

b. Slew rate

c. Upper 3 dB frequency

d. Lower 3 dB frequency

5. A distorted sinusoid has the amplitudes A

_{1}, A_{2}, A_{3}… of the fundamental, second harmonic, third harmonic, …..respectively. The total harmonic distortion is6. The emitter coupled pair of BJT’s given a linear transfer relation between the differential output voltage and the differential input voltage V

_{id}, only when the magnitude of V_{id}is less α times the thermal voltage, where α isa. 4

b. 3

c. 2

d. 1

7. In a Shunt – Shunt negative feedback amplifier, as compared to the basic amplifier

a. Both, input and output impedances decreases

b. Input impedance decreases and output impedance increases

c. Input impedance increases and output impedance decreases

d. Both, input and output impedances increases

8. A multistage amplifier has a low pass response with three real poles at s = - ω

_{1}, - ω_{2}and -ω_{3}. The approximate overall bandwidth B of the amplifier will be given by9. A high – Q quartz crystal exhibits series resonance at the frequency ω

_{s}and parallel resonance at the frequency ω_{p}. Thena. ω

_{s}is very close to, but less than ω_{p}b. ω

_{s}<< ω_{p}c. ω

_{s}is very close to, but greater than ω_{p}d. ω

_{s}>> ω_{p}10. One input terminal of high gain comparator circuit is connected to ground and a sinusoidal voltage is applied to the other input. The output of comparator will be

a. A sinusoid

b. A full rectified sinusoid

c. A half rectified sinusoid

d. A square wave

11. In a series regulated power supply circuit, the voltage gain A

_{v}of the pass transistor satisfies the conditiona. A

_{v}-> ∞b. 1 << A

_{v}< ∞c. A

_{v}≡ 1d. A

_{v}<< 112. For full wave rectification, a four diode bridge rectifier is claimed to have the following advantages over a two diode circuit:

1. Less expensive transformer

2. Smaller size transformer, and

3. Suitability for higher voltage application.

Of these,

a. Only 1 and 2 are true

b. Only 1 and 3 are true

c. Only 2 and 3 true

d. 1, 2 as well as 3 are true

13. In the MOSFET amplifier of the figure, the signal output V

_{1}and V_{2}obey the relationship14. For small signal ac operation, a practical forward biased diode can be modeled as

a. Resistance and capacitance in series

b. Ideal diode and resistance in parallel

c. Resistance and ideal diode in series

d. Resistance

15. For the circuit shown,

a. Draw the transfer characteristics if both diodes D

_{1}and D_{2}are ideal.b. How would the characteristics change, if D

_{2}is ideal but D_{1}is non-ideal? Assume D_{1}has forward resistance of 10 Ω and a reverse resistance of infinity.**Solution:****https://www.youtube.com/watch?v=yUlminRY5-A**16. Determine the input impedance of the circuit shown and investigate if it can be inductive.

**Solution:****https://www.youtube.com/watch?v=XU0TAARC8ek**17. Find the value of R’ in the circuit shown for generating sinusoidal oscillations. Find the frequency of oscillations.

**Solution:****https://www.youtube.com/watch?v=XfcgpXRRb4c**18. In the circuit shown, determine the resistance R

_{o}seen by the output terminals. Ignore the effect of R_{1}and R_{2}.**Solution:****https://www.youtube.com/watch?v=5MwOePWDgQM**19. Implement a monostable multivibrator using the timer circuit shown in figure. Also determine an expression for ON time ‘T’ of the output pulse.

**Solution:****https://www.youtube.com/watch?v=eaM2kglGuJ8**