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Multiple choice various types of barometer fluids physics
Fluid used in Aneroid barometer is

  1. Mercury

  2. Glycerine

  3. Kerosene

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The word 'aneroid' means dry. They are called dry because they do not use any fluid in them. They work on the bulging and compression of diaphragm.

Multiple choice various types of barometer fluids physics

Most commonly known barometric fluid is

  1. Mercury

  2. Liquid oxygen

  3. Nitrogen

  4. Ammonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first reason to use mercury is its high density. The atmospheric pressure measured by mercury barometer is the pressure equal to that at the bottom of the mercury column given by $h\rho g$.

Due to high value of $\rho$ the same pressure can be measured for smaller value of $h$.
Also the vapor pressure of mercury is negligible, due to which the barometric height is not affected.

Multiple choice various types of barometer fluids physics
Aneroid word in Aneroid barometer means

  1. Wet

  2. Moist

  3. Dry

  4. Overflowing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

'Aneroid' means dry. Aneroid barometers are those barometers that do no require any fluid to work and measure atmospheric pressure. Hence they are called dry barometers due to this absence of any fluid(specially liquid).

Multiple choice various types of barometer fluids physics

If we use water, instead of mercury, as a barometric liquid,

  1. the glass tube needs to be much longer

  2. the glass tube needs to be of same length

  3. the glass tube needs to be much shorter

  4. the glass tube needs to be narrower
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury is the heaviest liquid. Therefore, it rises only to a height of $76cm$ to balance the atmospheric pressure. Water, being $13.6$ times lighter than mercury, will rise to a $13.6$ times larger height. So, the glass tube needs to be much longer.

Multiple choice various types of barometer fluids physics

 ______ is used as barometric liquid as it does not vaporise under vacuum condition.

  1. water

  2. air

  3. Mercury

  4. petrol
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

True. Mercury is used as barometric liquid because it does not vaporise under vacuum condition.

Multiple choice various types of barometer fluids physics

Mark the correct advantage of fortin's barometer.

  1. It is portable

  2. It a makes move accurate reading than simple barometer

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fortin's barometer is widely used in laboratories and in meteorological departments. Main advantage of Fortin's barometer is it is portable and it allows the mercury level in the cistern to be set to zero. this makes the reading move accurate.

Multiple choice various types of barometer fluids physics

Barometer which does not use any liquid is known as _________ barometer

  1. fortin's

  2. aneroid

  3. simple

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule). The evacuated capsule (or usually several capsules, stacked to add up their movements) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer. 

Multiple choice various types of barometer fluids physics

Which of the following is not used in an aneroid barometer?

  1. Thin material sheet.

  2. Vacuum chamber

  3. Permanent magnet.

  4. Levers.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Aneroid barometer consists of:

1. A thin material sheet used as a top.
2. Vacuum chamber.
3. Levers.
4. Pointer.
5. Calibration scale.

Multiple choice various types of barometer fluids physics

Aneroid barometer

  1. uses liquid

  2. do not use any liquid

  3. both

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A barometer is an instrument used to measure atmospheric pressure. The two types are liquid and aneroid barometer. Aneroid barometer do not use any liquid.

Multiple choice various types of barometer fluids physics

Which of the following is not a disadvantage of mercury barometer?

  1. Mercury does not stick to glass.

  2. It has a long glass tube and cannot be easily carried from one place to another.

  3. It requires zero adjustment before taking the reading.

  4. The barometer tube needs to be kept vertical to get the correct reading.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mercury barometer has the following disadvantages:

1. It has a long glass tube with no protection to it. So, it cannot be easily carried from one place to another.
2. It requires zero adjustment before taking the reading.
3. The barometer must be kept vertical to get the correct reading.
4. The container in which the glass tube is inverted is open from the top. So, the impurities may fall into it making the mercury impure.