MHT CET 2026 20th April Morning Shift | Fluid Mechanics Question 4 | Physics

If $450$ erg of work is done in blowing a soap bubble of radius '$r$', the additional work required to be done to blow it to a radius equal to $3r$ is

$2400$ erg

$3000$ erg

$3600$ erg

$4000$ erg

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

The excess pressure inside a soap bubble of radius $2.5$ cm is $48$ dyne/cm$^2$. The surface tension of soap solution in dyne /cm is

$25$

$30$

$35$

$40$

MHT CET 2026 20th April Morning Shift

MCQ (Single Correct Answer)

-0

In case of liquid, if Reynold's number '$R_n$' is $1450$, then the flow of liquid will

be streamline.

be turbulent.

change from streamline to turbulent flow.

be sometimes turbulent and sometimes streamline.

MHT CET 2025 5th May Evening Shift

MCQ (Single Correct Answer)

-0

The liquid (mercury) meniscus in capillary tube will be convex if the angle of contact is

greater than $90^{\circ}$

less than $90^{\circ}$

equal to $90^{\circ}$

equal to $0^{\circ}$

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