Barometer

Q.

Barometer is used to measure

Q.

Name the given device which is used to measure the atmospheric pressure.

1. Dropper

2. Syringe

3. Telescope

4. Barometer

Q.

Statement 1: We can use water instead of mercury to construct a barometer for measuring the atmospheric pressure.

Statement 2: We do not use water in a barometer because it will be very inconvenient to use.

1. Only statement 1 is correct

2. Only statement 2 is correct.

3. None of the statements are correct.

4. Both the statements are correct.

Q.

Mention two advantages and two disadvantages of using mercury as a thermometric liquid.

Q. Which liquid is used in a barometer?

1. Alcohol
2. Mercury
3. Liquid nitrogen
4. Gasoline

Q.

Advantages of using mercury over water as barometer fluid include:

1. Legible and apt readings, because of the opacity of mercury.

2. A smooth flow of mercury in the tube as it does not stick to the glass.

3. A shorter tube length because of the high density of mercury.

4. The abundance of mercury over water in nature.

Q.

A hand-pump is used to pull up water. The mechanism involved is similar to that of a siphon

1. False

2. True

Q.

What will happen to the height of the mercury column if we take a Barometer inside a deep pit/trench?

1. Not predictable.

2. It increases

3. It decreases

4. Remains constant

Q. A barometer can be used:

1. To measure the atmospheric pressure
2. To forecasting weather
3. To measure heights
4. To measure liquid pressure

Q.

For a mercury barometer, the change in level of mercury in the tube is due to the change in ____.

1. gas pressure

2. atmospheric pressure

3. mercury pressure

4. liquid pressure

Q. Name the fluid that is used in a Barometer for measuring the atmospheric pressure.

1. Mercury
2. Water
3. Oil
4. Kerosene

Q.

A trekker climbs up a mountain with a barometer. As he goes up, the mercury column ____.

1. goes up

2. goes down

3. remains as it is

4. goes down to zero

Q.

By drawing a neat diagram explain the construction and working of a common water pump.

Q. Who developed the barometer?

1. Torricelli
2. Bernoulli
3. C.V. Raman
4. Galileo

Q.

What type of instrument is used to measure atmospheric pressure?

Q.

At a given place barometer reads 76 cm of mercury when its tube is absolutely vertical. When the tube is tilted, the reading of the barometer will be

1. more than 76 cm

2. 76 cm

3. less than 76 cm

4. none of the above

Q. Explain why mercury is used as a barometric fluid, instead of water.
[3 Marks]

Q. If a barometer is kept on the earth's surface then calculate the height of the barometer column $h$.
Atmospheric Pressure ($P_a$) is ${10}^5$.
The density of mercury (${\rho }_m$) is $13600kg{m}^{-3}$.
Gravitational acceleration ($g$) near earth's surface is $10m{s}^{-2}$.

1. $64cm$
2. $74cm$
3. $84cm$
4. $94cm$

Q.

Statement 1: It is necessary to keep a Barometer under the open sky to get the reading of atmospheric pressure.

Statement 2: Under a roof, the Barometer will give zero reading.

1. Statement 1 is correct

2. Statement 2 is correct

3. Both the statements are correct

4. Both the statements are incorrect

Q. In Barometer, the weight of the column in the tube is equal to the force applied on it by the mercury bowl due to atmospheric pressure.

1. True
2. False

Q.

The standard atmospheric pressure is :

1. 76 cm of Hg

2. 76 mm of Hg

3. 100 mm of Hg

4. 36 mm of Hg

Q. In a functional siphon, water rushes from the reservoir to the siphon because the ______________.

1. pressure in siphon is higher than atmospheric pressure
2. pressure in siphon is zero
3. pressure has no role in the phenomena
4. 
   pressure in siphon is lower than atmospheric pressure

Q.

name the instrument used to measure root pressure

Q. A barometer tube reads 76 cm of mercury. If the tube is gradually inclined keeping the open end immersed in the mercury reservoir, will the length of mercury column be 76 cm, more than 76 cm or less than 76 cm?