Flip Flops – 1 – 6

26. Consider a RS flip-flops with both inputs set to 0. If a momentary ‘1’ is applied at the input S, then the output :

(a) Q will flip from 0 to 1
(b) Q will flip from 0 to 1 and then back to 0
(c) Q will flip from 1 to 0
(d) Q will flip from 1 to 0 and then back to 1

ANSWER

EXPLANATION

27. SR Flip flop can be converted to T-type flip-flop if ?

(a) S is connected to Q
(b) R is connected to Q
(c) Both S and R are shorted
(d) S and R are connected to Q and Q’ respectively

ANSWER

EXPLANATION

28. The main difference between JK and RS flip-flop is that :

(a) There is a feedback in JK flip-flop
(b) JK flip-flop accepts both inputs as 1
(c) JK flip-flop does not need a clock pulse.
(d) JK flip-flop is acronym of Junction cathode multivibrator

ANSWER

EXPLANATION

29. For which of the following flip-flop the output clearly defined for all combinations of two inputs ?

(a) T flip-flop
(b) J K flip-flop
(c) Q type flip-flop
(d) SR type flip-flop

ANSWER

EXPLANATION

30. What is the maximum counting speed of a 4 bit binary counter which is composed of flip-flops with a propagation delay of 25 ns ?

(a) 1 MHz
(b) 4 MHz
(c) 25 MHz
(d) 100 MHz

ANSWER

EXPLANATION

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