The Bat Life: To monitor the pressure of helium in the canister, Batman had placed 2 sensors which sense pressure and temperature at points P1 and P2. When the piston was in motion, Batman's suit registered an error in the canister. When he analysed the error back in the Batcave he noticed that the pressure at points P1 and P2 were different. Which amongst the following statements is true?
The Bat Life: To monitor the pressure of helium in the canister, Batman had placed 2 sensors which sense pressure and temperature at points P1 and P2. When the piston was in motion, Batman's suit registered an error in the canister. When he analysed the error back in the Batcave he noticed that the pressure at points P1 and P2 were different. Which amongst the following statements is true?
The sensors which detect the pressure at points 
are faulty. A gas confined within a single boundary cannot have twovalues of pressure
The correct option is B The sensors need not necessarily be faulty, as the gas is not in equilibrium.
The concept of a single macroscopic pressure for a gas in a container is only defined when the gas is in equilibrium. When the piston is in motion the gas is not in equilibrium, hence there is no concept of a single macroscopic pressure. Hence the sensors need not necessarily be wrong.
The sensors need not necessarily be faulty, as the gas is not in equilibrium.
The concept of a single macroscopic pressure for a gas in a container is only defined when the gas is in equilibrium. When the piston is in motion the gas is not in equilibrium, hence there is no concept of a single macroscopic pressure. Hence the sensors need not necessarily be wrong.
