Q152 / 200 · MHT CET - Medical 2026 (26 April Shift 1) · Physics
In case of liquid flowing on horizontal surface the flow of liquid becomes unsteady, when Reynolds number $R_n$ is
- Aless than $499$
- Bbetween $500$ to $999$
- Correct answerCbetween $1000$ to $2000$
- Dgreater than $2001$
Solution
According to the standard conventions for fluid flow:
If the Reynolds number $R_n < 1000$, the flow of the liquid is streamline or laminar.
If the Reynolds number $R_n > 2000$, the flow of the liquid is turbulent.
If the Reynolds number lies in the range $1000 < R_n < 2000$, the flow of the liquid becomes unsteady (transitional state).
Therefore, the flow becomes unsteady when the Reynolds number is between $1000$ to $2000$.
Answer: between $1000$ to $2000$
If the Reynolds number $R_n < 1000$, the flow of the liquid is streamline or laminar.
If the Reynolds number $R_n > 2000$, the flow of the liquid is turbulent.
If the Reynolds number lies in the range $1000 < R_n < 2000$, the flow of the liquid becomes unsteady (transitional state).
Therefore, the flow becomes unsteady when the Reynolds number is between $1000$ to $2000$.
Answer: between $1000$ to $2000$
Hence, the correct answer is option: 'C'.