Rotation of fan blade is aa)Permanent changeb)Undesirable changec)Non- periodic changed)Periodic changeCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Rotation of fan blade is a periodic change as it is repeated at fixed interval of time.
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Answer

D is correct because,Rotation of fan blade is a periodic change as it is repeated at fixed interval of time.

Answer

A)

Answer

Periodic Change

The correct answer is option 'D', which states that the rotation of a fan blade is a periodic change. Let's understand why this is the case:

Definition of Periodic Change
Periodic change refers to a change that occurs regularly and repeats itself over a fixed interval of time. In other words, it follows a specific pattern and occurs at regular intervals.

Rotation of Fan Blade
The rotation of a fan blade can be considered as a periodic change because it occurs regularly and follows a specific pattern. When a fan is turned on, the blades start rotating in a circular motion. This motion continues as long as the fan is switched on.

Key Points:
Here are some key points that support the classification of the rotation of a fan blade as a periodic change:

1. Regular Occurrence: The rotation of a fan blade occurs regularly and repeatedly. Each rotation follows the same pattern and occurs at fixed intervals of time.

2. Predictable Pattern: The motion of the fan blades follows a predictable pattern. They rotate in a circular motion, creating a flow of air in a specific direction.

3. Fixed Interval: The time taken for one complete rotation of the fan blades remains constant, given that the fan is operating at a consistent speed. This fixed interval makes it a periodic change.

4. Repetition: The rotation of the fan blades repeats itself continuously as long as the fan is switched on. This repetition forms the basis of periodicity.

Conclusion
Based on the above points, it can be concluded that the rotation of a fan blade is a periodic change. It occurs regularly, follows a predictable pattern, and repeats itself over a fixed interval of time. This understanding of periodicity helps us classify the rotation of a fan blade as a periodic change rather than a permanent change, an undesirable change, or a non-periodic change.

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