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QJEEM21Ph92cf: JEE Main 2021 Physics - Class 11 JEEM21Ph92cf Solution: What will be the nature of flow of water from a circular tap,…

What will be the nature of flow of water from a circular tap, when its flow rate increased from 0.18 L/min to 0.48 L/min? The radius of the tap and viscosity of water are 0.5 cm and 10−3 Pa s, respectively. (Density of water : 103 kg/m3)

Multiple Choice Options

  • A Steady flow to unsteady flow
  • B Unsteady to steady flow
  • C Remains turbulent flow
  • D Remains steady flow

Step-by-Step Verified Solution

The nature of flow is determined by reynolds no

R=ρVDη

If R < 1000 → flow is steady

1000 < R < 2000 → flow becomes unsteady

R > 2000 → flow is turbulent

R1=4×103×0.18×10−360×π×10−2×10−3=4×105×0.1860π

=0.0038×105=380

R2=0.480.18×380=1018

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