MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Question: (a) It is almost impossible to obtain a clean voltage transition from a mechanical switch because of the phenomenon of contact bounce. This is illustrated in Figure 4a, where the bouncy switch makes and breaks contact producing several output voltage transitions.

Detailed explanation-2: -Switch bouncing is another real-world problem that happens too quickly for human perception but which can doom an electronics project. When a switch is toggled, contacts have to physically move from one position to another.

Detailed explanation-3: -Simply, we can say that the switch bouncing is the non-ideal behavior of any switch which generates multiple transitions of a single input. Switch bouncing is not a major problem when we deal with the power circuits, but it cause problems while we are dealing with the logic or digital circuits.

Detailed explanation-4: -Solution. You can use a latch or an SR flip-flop to eliminate signal bounce or noise caused by the switching of a mechanical device (switches, buttons etc.). When the switch occurs, only one input is affected immediately before stabilizing. This is followed by the second input bouncing before the contact stabilizes.

Detailed explanation-5: -Because bounce means that every time the switch is closed, several pulses are generated and so the counter counts too much.