Question

In a functional siphon, water rushes from the reservoir to the siphon because____.

• A. the pressure in siphon is higher than atmospheric pressure.
• B. the pressure in siphon is zero.
• C. the pressure in siphon is lower than atmospheric pressure.
• D. pressure has no role in the phenomena.

Answer 1

The correct option is C

the pressure in siphon is lower than atmospheric pressure.

Siphon is a device/tube which allows a liquid to flow through it without any use of pump. A low pressure is created by the suction effect of a part of liquid flowing under gravity and due to that, liquid rushes from the reservoir to the tube. A fluid always flow from high pressure to low pressure and it continues to do so unless equillibrium is established.