Physics_JEE_Advance_2017_S1 - Competishun – Live JEE & NEET Courses and Exam Prep

JEE Advance 2017

Paper-2

Multiple correct answers - Select all that apply

Question

A flat plate is moving normal to its plane through a gas under the action of a constant force $F$. The gas is kept at a very low pressure. The speed of the plate v is much less than the average speed $u$ of the gas molecules. Which of the following options is/are true?

Select ALL correct options:

The pressure difference between the leading and trailing faces of the plate is proportional to uv

At a later time the external force F balances the resistive force

The resistive force experienced by the plate is proportional to v

The plate will continue to move with constant non-zero acceleration, at all times

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

⚠ Partially correct. Some answers are missing.

Solution