Page 1106 - Basic Electrical Engineering

20. Explain JK flip-flop. What is T flip flop?
21. Draw and explain the circuit for master–slave JK flip-flop.
22. What is a digital system? Give an example of a digital system and name its subsystems.

B. Numerical Problems

23. Convert the binary number 1001 into decimal number, and decimal number 19 into binary
number.

[Ans 9, 10011]

24. Convert decimal numbers 7547 and 100.625 into hexadecimal numbers.

[Ans (7547) = (107 B) ; (100.625) = (64.A) ]
10
16
10
16
25. Convert the following hexadecimal numbers to binary.

a. AEO;
b. 75 F;
c. E 25.

[Ans (a) 101011100000; (b) 011101101111 (c) 111000100101]

26. Convert the following octal into binary.

a. 71;
b. 560;
c. 173.

[Ans (a) 111001; (b) 101110000; (c) 001111011]

27. Perform the following binary operations.

a. (1011) ×(1001) ;
2
2
b. (111) × (190) .
2
2

[Ans (a) 1100011; (b) 101010]

28. Express the decimal number 9 into (a) binary; (b) BCD; (c) octal; (d) hexadecimal.