Question

While filling a syringe with liquid which of the following is true for pressure inside the barrel and the atmospheric pressure acting on the liquid?

• A. pressure inside the barrel is less than atmospheric pressure
• B. pressure inside the barrel is more than atmospheric pressure
• C. pressure inside the barrel is same as atmospheric pressure
• D. none of these

Answer 1

The correct option is A pressure inside the barrel is less than atmospheric pressure

When the plunger is pulled up in the barrel, the pressure inside the barrel is much less than atmospheric pressure. As a result atmospheric pressure forces the liquid to rise up in the syringe.