In a stream line (laminar flow) the velocity of flow at any point in the liquid:

does not vary with time

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may vary in direction but not in magnitude

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may vary in magnitude but not in direction

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may vary both in magnitude and direction

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Solution

The correct option is A does not vary with time
By definition, In streamline flow the velocity of flow at any chosen point in the liquid is always the same i.e. doesn't vary with time.

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In a stream line (laminar flow) the velocity of flow at any point in the liquid:

The correct option is A does not vary with timeBy definition, In streamline flow the velocity of flow at any chosen point in the liquid is always the same i.e. doesn't vary with time.

The correct option is A does not vary with time
By definition, In streamline flow the velocity of flow at any chosen point in the liquid is always the same i.e. doesn't vary with time.