Tag: fluids

Questions Related to fluids

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

various types of barometer fluids physics

  1. fortin's

  2. aneroid

  3. simple

  4. none

Show answer
Correct Option: B
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. 

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

various types of barometer fluids physics

  1. Thin material sheet.

  2. Vacuum chamber

  3. Permanent magnet.

  4. Levers.

Show answer
Correct Option: C
Explanation:

Aneroid barometer consists of:

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

Aneroid barometer

various types of barometer fluids physics

  1. uses liquid

  2. do not use any liquid

  3. both

  4. none

Show answer
Correct Option: B
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.

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

various types of barometer fluids physics

  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.

Show answer
Correct Option: A
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.

The pointer of aneroid barometer should be

various types of barometer fluids physics

  1. Light

  2. Frictionless

  3. Pointed

  4. All of the above

Show answer
Correct Option: D
Explanation:

Light needle and system increases sensitivity of the barometer. Frictionless needle improves the efficiency of the system. Pointed needle improves accuracy and removes human errors.

Define altimeter.

various types of barometer fluids physics

  1. It is a device derived from an aneroid barometer used to measure height.

  2. It is a device derived from a simple barometer used to measure height.

  3. It is a device derived from spring balance used to measure weight.

  4. It is a device derived from a stopwatch used to measure time.

Show answer
Correct Option: A
Explanation:

Altimeter is a device used to measure height at a point. It works on the principle of decrease in pressure with an increase in the altitude and actually measures pressure. Aneroid barometers are generally used as altimeter because it is easy to use and carry.

To scale used in fortin's barometers

various types of barometer fluids physics

  1. meter scale

  2. vernier scale

  3. both

  4. none

Show answer
Correct Option: A
Explanation:

A vernier scale is provided at the top of glass west tube for accurate reading.

Aneroid barometer is preferred over simple barometer when

various types of barometer fluids physics

  1. carrying simple barometer is not easy.

  2. more accuracy is required.

  3. pressure in fluid is not uniform.

  4. it is never preferred.

Show answer
Correct Option: A
Explanation:

Simple barometer is not easy to carry. However, it gives very precise readings. The few drawbacks of simple barometer are counterfeited in an aneroid barometer.

Mercury is the heaviest liquid.
What is the advantage of the given property in the working of a barometer?

various types of barometer fluids physics

  1. It gives stability to the apparatus.

  2. Its rises to a maximum height of 76 cm which is the smallest value for a fluid.

  3. Other impurities float over it.

  4. It is poisonous.

Show answer
Correct Option: B
Explanation:

Since the density of mercury is highest in the liquids, it needs smallest column to measure the pressure reducing the size of the equipment and making it easier to use. 

The system of lever in Aneroid barometer helps in
various types of barometer fluids physics
  1. Protecting the diaphragm from collapsing
  2. Reducing atmospheric pressure
  3. Increasing atmospheric pressure
  4. Magnifying the tiny movement of central lever
Show answer
Correct Option: D
Explanation:

Aneroid barometers are popular for their light weight and size which increases its portability. 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 which is corrugated in form of a diaphragm. 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.