Figure shows a cylinder containing helium gas at atmospheric

Last updated: 6/8/2023

Figure shows a cylinder containing helium gas at atmospheric pressure with a tightly fitting piston of weight one fourth the force acting due to atmospheric pressure The cylinder is jammed at its bottom A block B is hung by means of a mass less string whose other end is attached to the piston It is observed that the piston just starts sliding next the block B is directly placed above the piston Assuming the piston to move slowly find the fractional volume of the gas compressed fixed A C D