Q-A latch is an example of a ___________
a) Monostable multivibrator
b) Astable multivibrator
c) Bistable multivibrator
d) 555 timer
………..
Answer: c
Explanation: A latch is an example of a bistable multivibrator. A Bistable multivibrator is one in which the circuit is stable in either of two states. It can be flipped from one state to the other state and vice-versa.
Q-How many types of latches are ___________
a) 4
b) 3
c) 2
d) 5
………….
Answer: a
Explanation: There are four types of latches: SR latch, D latch, JK latch and T latch. D latch is a modified form of SR latch whereas, T latch is an advanced form of JK latch.
Q-The full form of SR is ___________
a) System rated
b) Set reset
c) Set ready
d) Set Rated
……….
Answer: b
Explanation: The full form of SR is set/reset. It is a type of latch having two stable states.
Q-The SR latch consists of ___________
a) 1 input
b) 2 inputs
c) 3 inputs
d) 4 inputs
………….
Answer: b
Explanation: SR or Set-Reset latch is the simplest type of bistable multivibrator having two stable states.
The diagram of SR latch is shown below:
Q-The outputs of SR latch are ___________
a) x and y
b) a and b
c) s and r
d) q and q’
………….
Answer: d
Explanation: SR or Set-Reset latch is the simplest type of bistable multivibrator having two stable states. The inputs of SR latch are s and r while outputs are q and q’. It is clear from the diagram:
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