Distinguish between static and dynamic hazard. How will youdetermine hazard in combinational circuits?

Static and dynamic hazards are two types of hazards that can occur in digital circuits.

1. Static Hazard: A static hazard is a situation where, when changing from one combination of inputs to another, the output changes momentarily before stabilizing to its correct value. This can occur in two ways: static-1 hazard, where the output momentarily goes to 0 when it should remain at 1, and static-0 hazard, where the output momentarily goes to 1 when it should remain at 0.

2. Dynamic Hazard: A dynamic hazard is a situation where, when changing from one combination of inputs to another, the output changes more than once before stabilizing to its correct value. This means the output can momentarily oscillate between 0 and 1 before settling.

To determine hazards in combinational circuits, you can use the following steps:

1. Draw the Karnaugh Map (K-Map) for the given combinational circuit.
2. Identify the groups of 1s (for SOP expression) or 0s (for POS expression) in the K-Map.
3. If there is any overlapping group or if any group is not covered, then there is a static hazard.
4. If there is a change in more than one variable in the adjacent group, then there is a dynamic hazard.
5. To eliminate static hazards, include the missing group in the simplified expression.
6. To eliminate dynamic hazards, make sure that there is only one change in the variable at a time.

Remember, the goal is to ensure that the output changes smoothly and predictably as the inputs change, without any glitches or oscillations.