Guru Gobind Singh Indraprastha Vishwavidyalaya 2005 B.E Electrical and Electronics Engineering Electrical Technology - Question Paper

ETIC 208
Q.1 In the subsequent objective kind ques. 4 options (i), (ii), (iii), (iv) are provided
out of which only 1 is accurate. Write the accurate ans.
(a) The Boolean expression for the shaded area in the Venn diagram is
******
(i) ****
(ii) ****
(iii) ****
(iv) X + Y + Z

(b) The minimum product of sums of the Boolean expression **** is
(i) ****
(ii) ****
(iii) ****
(iv) ****

(c) The decimal number 85 is encoded as 1100 – 0101 in
(i) 8421 code
(ii) 4421 code
(iii) 2421 code
(iv) 2221 code

(d) The 2’s complement of the number 0.0011 is
(i) 1,1100
(ii) 0,1101
(iii) 1,1101
(iv) 0,1101

(e) The circuit beneath represents a
*****
(i) Exclusive OR
(ii) Comparator
(iii) Inhibit gate
(iv) NAND gate

(f) Conversion of 13.8125 in digital form is
(i) 1101.1011
(ii) 1011.1111
(iii) 1101.1101
(iv) 1011.1111

(g) A ring counter is identical as
(i) up- down counter
(ii) parallel counter
(iii) shift register
(iv) none of these

(h) Which of the subsequent circuit converts a JK flip-flop to a T flip- flop.
(i) ******
(ii) ****
(iii) ****
(iv) ****

(i) In the circuit shown beneath the output Y1 and Y2 for the provided initial
condition Y1=Y2=1 and after 4 input pulses will be,
*****
(i) Y1 = 1, Y2 = 0
(ii) Y1 = 0, Y2 = one
(iii) Y1 = 0, Y2 = 0
(iv) Y1 = 1, Y2 = one

(j) How many 7490 Ics are to be cascaded to count upto 999?
(i) one
(ii) two
(iii) three
(iv) four

(k) The output of a JK flip- flop toggles when
(i) J=1, K=0
(ii) J=0, K=1
(iii) J=1, K=1
(iv) J=0, K=0

(l) An electronic wrist watch has a clock of frequency 32 KHz. To divide

Earning:   Approval pending.