Questions Must Read Before Exams|| B.Tech 1st Year Important Questions|| Basic Electronics ~ My Notes

B.Tech [1^ST Year]

Basic Electronic

1. (a) Discuss the construction of NPN bipolar junction transistor and explain its working in the active region.

(b) Describe the operation of P-N junction under no bias, forward bias, & reverse bias conditions. With diagram

2. (A) Explain the working of bridge rectifier with diagrams.

(b) What are different properties of an ideal operational

amplifier?

(c)How can a voltage dependent constant current source be

used as a voltage amplifier?

(d)State De Morgan’s theorems.

3. (A) How can PN diode be used as a switch? Explain.

(b) Plots input and output voltage waveforms for the

following circuit (Assume ideal diode).

(c)Provide block diagram of a digital multimeter. What are different quantities that can be measured using it?

(d)Provide schematic diagram for an inverting amplifier and drive relationship between input & output voltages.

4. (a)Explain the working of an Enhancement-type N-channel

MOSFBT provide current-voltage characteristic and mark different regions of operation.

(b)Provide block diagram of CRO and explain its working.

5. (A) Calculate operating point (Q-point) for BJT in the following circuit (beta=100).

(b)Convert the following numbers to their binary equivalents;

(i) (128)9

(ii) (21)10

(c)Provide circuit diagram for an integrator using Op-amp and derive output voltage.

6. (A) Following circuit consists of a step-down transformer, a bridge rectifier, and filter capacitor.

7. Draw and explain the ideal diode characteristics.

8. Describe the V-I Characteristics of the npn transistor.

9. Describe the various number system.

10. Describe the physical structure of FET.

11. Explain various properties of the operational amplifier (OM-AMP).

12. Explain the various fundamental theorems of Boolean algebra.

13. Describe with diagram the operation of PN junction in forward and reverse bias mode. Also, explain Zener-diode and its application.

14. Describe half-wave and full wave rectifiers .also derive the expression for IDC , I rms, Ripple factor and efficiency.

15.Briefly explain the common bore, common emitter and common collector configuration of BJT

With the help of neat diagram explain MOSFET and its classification.

16. Derive the expression for OP-AMP as a weighted summer, integrator, and differentiator.

(A)Implement AND and OR gate with help of universal gates.

(b)Convert the following:

(i)(1011010)2= (?)4 =(?)8 =(?)16

(ii)(101110)gray =(?)2

(iii)(746)10 =(?)5

( Note- All questions are basis of Past year exam papers )

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