Tag: physics

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Questions Related to physics

Multiple choice various types of barometer fluids physics

The pointer of aneroid barometer should be

  1. Light

  2. Frictionless

  3. Pointed

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice various types of barometer fluids physics

Define altimeter.

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice various types of barometer fluids physics

To scale used in fortin's barometers

  1. meter scale

  2. vernier scale

  3. both

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

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

Multiple choice various types of barometer fluids physics

Aneroid barometer is preferred over simple barometer when

  1. carrying simple barometer is not easy.

  2. more accuracy is required.

  3. pressure in fluid is not uniform.

  4. it is never preferred.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice various types of barometer fluids physics

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

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

Multiple choice various types of barometer fluids physics
The system of lever in Aneroid barometer helps in

  1. Protecting the diaphragm from collapsing

  2. Reducing atmospheric pressure

  3. Increasing atmospheric pressure

  4. Magnifying the tiny movement of central lever
Reveal answer Fill a bubble to check yourself
D Correct answer
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. 

Multiple choice various types of barometer fluids physics
When atmospheric pressure increases, the rod present at the upper end of the metallic box of the Aneroid barometer

  1. gets elevated

  2. gets depressed

  3. remains static

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
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.  When atmospheric pressure increases, the spring in upper end of box gets depressed and the reading is thus visible due to the elastic potential energy stored in the spring due to compression which pushes the diaphragm inside.

Multiple choice various types of barometer fluids physics
The flat spring present in Aneroid barometer

  1. Depresses the rod

  2. Elevates the rod

  3. Protects the diaphragm from collapsing

  4. Decreases the atmospheric pressure
Reveal answer Fill a bubble to check yourself
C Correct answer
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. 

Multiple choice various types of barometer fluids physics
Diaphragm is seen as a component of ........ barometer.

  1. Fortin

  2. Simple

  3. Aneroid

  4. None
Reveal answer Fill a bubble to check yourself
C Correct answer
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.  Since it is calibrated directly for the atmospheric pressure, no prior adjustments are required to be made before its usage.

Multiple choice various types of barometer fluids physics
When atmospheric pressure decreases, the diaphragm of Aneroid barometer

  1. Bulges out

  2. Bulges in

  3. Get depressed

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
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.  When atmospheric pressure increases, the spring in upper end of box gets depressed and the reading is thus visible due to the elastic potential energy stored in the spring due to compression.

When the pressure decreases, the diaphragm to which spring is attached bulges out, showing the reading in the opposite direction.