Question
What is a manometer? How does it show whether the pressure inside a vessel connected to one arm of it, is lower or above the atmospheric pressure?
✓
Answer
A manometer is a simple pressure gauge that measures differences in pressure at the two ends of the apparatus.
The manometer is a U shaped tube containing water whose one limb is dipped in vessel and vessel is tightly covered with a plastic sheet. U shaped tube has two limbs one towards the vessel and the other is opened to the atmosphere.
Now if the level of water toward atmospheric open limb is more than the level of water in limb towards apparatus end then the liquid is said to be at a higher pressure than the atmosphere. And if the level of water toward atmospheric open limb is less than the level of water in limb towards apparatus end then the liquid is said to be at a lower pressure than atmospheric pressure.
The manometer is a U shaped tube containing water whose one limb is dipped in vessel and vessel is tightly covered with a plastic sheet. U shaped tube has two limbs one towards the vessel and the other is opened to the atmosphere.
Now if the level of water toward atmospheric open limb is more than the level of water in limb towards apparatus end then the liquid is said to be at a higher pressure than the atmosphere. And if the level of water toward atmospheric open limb is less than the level of water in limb towards apparatus end then the liquid is said to be at a lower pressure than atmospheric pressure.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A body of volume V and density $\rho_{ s }$, floats with volume v inside a liquid of density $\rho_{ L }$. Show that $\frac{v}{V}=\frac{\rho_s}{\rho_L}$
→Deduce an expression for the pressure at depth inside a liquid.
Complete the following diagrams shown in Fig. by drawing the reflected ray for each of the incident ray A and B.
Define the least count of vernier callipers. How do you determine it?
Show how will you use the physical balance to measure the mass of an object.
At what height above the earth's surface would the value of acceleration due to gravity be half of what it is on the surface? Take the radius of earth to be R.
Explain the method of plotting the magnetic field lines by using a small compass needle.
From the velocity - time graph given below, calculate :
1. Acceleration in the region AB.
2. Deceleration in region BC.
3. Distance covered in the region ABCE.
4. Average velocity in region CED.
1. Acceleration in the region AB.
2. Deceleration in region BC.
3. Distance covered in the region ABCE.
4. Average velocity in region CED.
A spaceship is moving in space with a velocity of $50 kms ^7$. Its engine fires for 10 s , such that its velocity increases to $60 kms ^{-1}$. Calculate the total distance travelled by spaceship in $1 / 2$ minute, from the time of firing its engine
→A motor bike running at $90 kmh ^{-1}$ is slowed down to $18 kmh ^{-1}$ in 2.5 s . Calculate
1. acceleration
2. distance covered during slow down.
→1. acceleration
2. distance covered during slow down.