Physics · General Awareness

Physics Measuring Instruments

1,180 Questions

Physics measuring instruments are essential tools used to measure various physical quantities. This topic covers devices like hygrometers, oscilloscopes, and sphygmomanometers. It is a highly scoring section in general science and general awareness examinations.

Pressure and humidity instrumentsElectrical measuring devicesMedical physics toolsNavigational instruments

Physics Measuring Instruments Questions

Multiple choice various types of barometer fluids physics

The fluid used in aneroid barometer is 

  1. water

  2. mercury

  3. air

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

An aneriod  barometer is made up of a vacuum chamber covered by a thin elastic disk. High atmospheric pressure pushes against the disk and causes it to bulge inward, while low pressure does not push as hard, allowing the disk to bulge outward.

Multiple choice various types of barometer fluids physics

Fortin's Barometer is used to measure.

  1. Force

  2. Atmospheric pressure

  3. Temperature

  4. All
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fortin's barometer is used to measure atmospheric pressure. It is a modified form of Torricelli's simple barometer.

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
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

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.

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
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
Mark the correct statement about Aneroid barometer.

  1. It is portable

  2. It is heavy in weight

  3. It cannot be fixed in any plane

  4. All the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aneroid barometers are those barometers that do not use liquid to tell the atmospheric pressure. They are popular because of the portability due to their small weight and size.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.