Anna University
ELECTRONICS AND MICROPROCESSOR QUESTION BANK
Subject Code : ME2255ELECTRONICS AND MICROPROCESSOR QUESTION BANK
UNIT I - SEMICONDUCTORS AND RECTIFIERS
2 MARKS
1. What are valence electrons?
2. What is forbidden energy gap?
3. What are conductors? Give examples?
4. What are insulators? Give examples?
5. What are Semiconductors? Give examples?
6. What are the types of Semiconductor?
7. What is Intrinsic Semiconductor?
8. What is Extrinsic Semiconductor?
9. What are the types of Extrinsic Semiconductor?
10. What is P-type Semiconductor?
11. What is N-type Semiconductor?
12. What is doping?
13. Which is majority and minority carrier in N-type Semiconductor?
14. Which is majority and minority carrier in P-type Semiconductor?
15. What is depletion region in PN junction?
16. What is barrier voltage?
17. What is meant by biasing a PN junction?
18. What are the types of biasing a PN junction?
19. What is forward bias and reverse bias in a PN junction?
20. What is Reverse saturation current?
21. What is reverse break down?
22. Give the diode current equation?
23. Give two applications of PN junction diode.
24. What is rectifier? Give its types.
16 MARKS
1. Explain N-type and P-type semiconductor with their energy band diagram?
2. Explain the following
a. Mobility b. Drift current c. Conductivity d. Diffusion current
3. What is break down in diode? What are its types?
Unit II - TRANSISTORS AND AMPLIFIERS
2MARKS
1. What is a transistor (BJT)?
2. What are the terminals present in a transistor?
3. What is FET?
4. Why FET is called voltage controlled device?
5. What are the two main types of FET?
6. What are the terminals available in FET?
7. What is JFET?
8. What are the types of JFET?
9. What are the two important characteristics of JFET?
10. What is transconductance in JFET?
11. What is amplification factor in JFET?
12.Why do we choose q point at the center of the loadline?
13. List out the different types of biasing. ._
14. What do you meant by thermal runway?
15. Why is the transistor called a current controlled device?
16. Define current amplification factor?
17. What are the requirements for biasing circuits?
18. When does a transistor act as a switch?
19. What is biasing?
20. What is stability factor?
21. Explain about the various regions in a transistor?
22. Explain about the characteristics of a transistor?
16 MARKS
1. Explain the construction, operation, volt ampere characteristics, and application
of SCR, also explain its two transistor model.
2. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of UJT.
3. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of DIAC.
4. Explain the construction, operation, equivalent circuit, volt ampere
characteristics, and application of TRIAC
Unit III - DIGITAL ELECTRONICS
2MARKS
1. Define binary logic?
2. Convert (634) 8 to binary
3. Convert 0.640625 decimal number to its octal equivalent.
4. Convert 0.1289062 decimal number to its hex equivalent
5. Substract (0 1 0 1) 2 from (1 0 1 1) 2
6. Add (1 0 1 0) 2 and (0 0 1 1) 2
7. Using 10’s complement subtract 72532 - 3250
8. Find 2’S complement of (1 0 1 0 0 0 1 1) 2
9. Substract 1 1 1 0 0 1 2 from 1 0 1 0 1 1 2 using 2’ s complement method
10. What is meant by bit?
11. Define byte?
12. List the different number systems?
13. What are the different types of number complements?
14. Given the two binary numbers X = 1010100 and Y = 1000011, perform the
subtraction (a) X -Y and (b) Y - X using 2’s complements.
15. Write the names of basic logical operators.
16. What are basic properties of Boolean algebra?
17. State the associative property of boolean algebra.
18. State the commutative property of Boolean algebra.
19. State the distributive property of Boolean algebra.
20. What are the classification of sequential circuits?
21. Define Flipflop.
22. What are the different types of flip-flop?
16 MARKS
1. What is the operation of RS flip-flop?
2. What is the operation of SR flip-flop?
3. What is the operation of D flip-flop?
4. What is the operation of JK flip-flop?
5. What is the operation of T flip-flop?
6. What are the different types of shift type?
7. Explain couners.
Unit IV - 8085 MICROPROCESSOR
2MARKS
1. Give the power supply & clock frequency of 8085Microprocessor
2. What is the signal classification of 8085
3. What are operations performed on data in 8085
4. Steps involved to fetch a byte in 8085
5. How many interrupts does 8085 have, mention them
6. Basic concepts in memory interfacing
7. Define instruction cycle, machine cycle and T-state
8. What is an instruction
9. What is the use of ALE
10. How many machine cycles does 8085 have, mention them
3. What are operations performed on data in 8085
4. Steps involved to fetch a byte in 8085
5. How many interrupts does 8085 have, mention them
6. Basic concepts in memory interfacing
7. Define instruction cycle, machine cycle and T-state
8. What is an instruction
9. What is the use of ALE
10. How many machine cycles does 8085 have, mention them
11. Explain the signals HOLD, READY and SID
12. Mention the categories of instruction and give two examples for each category
13. Explain LDA, STA and DAA instructions
14. Explain the different instruction formats with examples
15. What is the use of addressing modes , mention the different types
16. Differentiate between absolute and linear select decoding?
17. What is the use of bi-directional buffers
18. Give the resister organization of 8085
19. Define stack and explain stack related instructions
20. Why do we use XRA A instruction
21. Define PSW
22. What is Microcontroller and Microcomputer
16 MARKS
1. Compare CALL and PUSH instructions
2. How does the microprocessor differentiate between data and instruction.
3. Explain 8085 architecture.
4. Explain the instruction set.of 8085.
5. Explain the Addressing modes
Unit V - INTERFACING AND APPLICATIONS OF MICROPROCESSOR
2MARKS
1. Give few applications of 8085 microprocessor.
2. List the advantages of microprocessor based system design.
3. What is a Buffer?
4. What is a tristate buffer?
5. What is meant by memory address space?
6. If an information flows from memory to microprocessor, which signal is used
by it?
7. What is the use CS pin of a memory chip?
8. If the starting address of 6K memory is 0D00, then ending address will be
9. If an information flows to memory, which signal is used by it?
10.What is memory mapping?
11. What is I/O mapping?
12. What is memory mapped I/O?
13. What is I/O mapped I/O?
14. Mention the advantages of memory mapped I/O.
15. Mention the advantages of I/O mapped I/O.
16. Mention the disadvantages of I/O mapped I/O.
17. What is the use of ALE signal?
18. What is the purpose IO/M signal?
19. Nane the two classifications of stepper motor.
20. List the applications of stepper motor.
16 MARKS
1. Explain I/O interfacing.
2. Explain stepper motor interfacing.
3. Explain traffic light control.
4. Explain temperature control using 8085.
