Course: 05, 12
Code: 3015
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
2. Positive plate of lead acid-cell is made of:
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