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Dimensions of velocity gradient are same as that of:
A. Time periodB. FrequencyC. accelerationD. length

Answer
VerifiedVerified
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Hint: Find the dimension of the velocity gradient and then compare it with the dimensions of the options.

Complete step-by-step solution -
The velocity gradient can be defined as the rate of change of velocity along with the distance.
So, V.G. =dvdx
Now the dimensions of velocity are: [LT1]
Dimensions of distance: [L]
So, V.G. will have dimension:
[LT1][L]=[T1]
Dimensions of:
Time period- It is the time taken for one cycle of any periodic quantity to complete. So it will have simple units of time [T].
Frequency- it is the number of times a cycle occurs per unit time. It is the inverse of the time period, so it has dimensions,
[1T]=[T1]
Acceleration- It is defined as the rate of change of velocity.
dvdt=a[LT1][T]=[LT2]
Length – It is a measure of the distance between two points. It has dimensions [L].
So, we observe that the dimensions of the velocity gradient are similar to that of frequency.
The correct option is (B).

Note: The gradient of a quantity represents the change along the distance. So any quantity’s gradient will be w.r.t. distance. Having similar dimensions does not imply that the physical quantities are physically similar.