Discussion
| List - I | List - II |
|---|---|
| (a) Monostable multivibrator | (i) Quasi stable state |
| (b) Astable multivibrator | (ii) One stable state |
| (c) Schmitt trigger | (iii) Two stable state |
| (d) Bistable multivibrator | (iv) No stable state |
Codes :
(a) (b) (c) (d)
Answer: B
The keyed code B is (ii) (iv) (i) (iii). The monostable multivibrator has one stable state (ii) and returns to it after a timed pulse, the astable multivibrator has no stable state (iv) and switches back and forth between two quasi-stable states, and the bistable multivibrator has two stable states (iii). The Schmitt trigger is left with the quasi stable state (i) in the list. The monostable and the astable are easily swapped, and the codes that swap them, options A and D, are wrong, while option C pairs the monostable with two stable states.
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