# Basics of Electrical and Electronics Engineering Old Paper  in Diploma

Course: 05, 12
Code: 3015

## Year/Sem.: Second Year/Third Semester

Time: 2.30 Hrs.     M.M.: 80

Section - A

Note: Attempt any ten questions.     10 X 1 = 10

1. Write the unit of current is

3. The negative plate of dry cell is made of.

4. The form factor for a sine wave is.

5. The normal charging voltage for alkali cell is about:
(a) 1v     (b) 1.2v
(c) 1.7v      (d) 2.1v

6. Power factor of the accompanying circuit will be zero:
(a) Resistive circuit      (b) Inductive circuit
(c) Capacitive circuit      (c) Both (a) and (b)

7. The output of an AND gate with three input A, B and C is high when:
(an) A = 1, B = 1, C = 0      (b) A = 0, B = 0, C = 0
(c) A = 1, B = 1, C = 1      (d) A = 1, B = 0, C = 0

8. The output of NOR gate is high if:
(a) All inputs are high      (b) Any input in high
(c) Any input is low      (d) All input are low

9. Due to increase in temperature collector current will be:
(a) 0      (b) Unchanged
(c) Increase     (d) Reduce

10. Break down voltage of germanium
(a) 0.6ev      (b) 7.5 ev
(c) 19.6 ev     (d) 0.75 ev

11. What is the Boolean expression for a three input AND gate?
(a) X = A + B + C      (b) X = A * B * C
(cn) A - B – C      (d) A & B & C.

Section – B

Note: Attempt any 5 questions:-     5 X 6 = 30

12. Explain form energy and advantage of electrical energy.

13. what do you mean by electric current and ohm’s law?

14. Convert the (247-36)8 octal number to hexadecimal equivalent.

15. Explain the construction and working of lead-acid cells.

16. By using 13 compliment method subtract (111)2-(1011)2

17. Write symbols and truth table of NAND Gate, NOR Gate, and XOR Gate.

18. Solve the expression AB+A (B+C) + B (B+C)

Section – C

Notes: Attempt any Five question:-     5 X 8 = 40

19. Forgiven k-map write the eq1 in SOP and POS form and logic diagram : 20. Forgiven variable make k-map and also make a logic diagram.
∫(A,B,C,D) - ∑ M (0, 1, 2,3, 5, 7, 8, 9, 11,14)

21. Convert the following octal number to Hexa-decimal equivalent.
(a) (423.74)8
(b) (2432)8

22. Explain the latch

23. Implement the expression using multiplexer.
F (A, B, C, D) = (0,2, 4, 5, 7, 11,13,14)

24. Describe the concept of Earthing and grounding and importance of Earthing.

25. Convert Hexadecimal Octal number (A7B)16 = (……)8

26. Convert the following decimal into octal number
(0.6S75)10 = (……)8