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


Barometer which is calibrated directly to read the atmospheric pressure is

  1. Aneroid barometer

  2. Fortin's barometer

  3. Simple barometer

  4. None
Reveal answer Fill a bubble to check yourself
A 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. Since the instrument calibrated directly to read the atmospheric pressure, 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
Barometer which do not require any prior adjustment for reading atmospheric pressure is

  1. Aneroid barometer

  2. Fortin barometer

  3. Simple barometer

  4. All the above
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. 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

Mark the correct statement about Aneroid barometer.

  1. It does not need any prior adjustment for reading atmospheric pressure.

  2. It is light in weight

  3. It is portable in nature

  4. All the above
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. 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

The measurement of altitude is known as

  1. Altimetry

  2. Altimeter

  3. barometry

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

The instrument used to measure the altitude is known as altimeter whereas altimetry is defined as the measurement of altitude.

Multiple choice various types of barometer fluids physics

Which is the most accurate instrument to measure pressure and is used as a standard?

  1. Aneroid Barometer

  2. Mercury Barometer

  3. Barograph

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

Answer is B

In the mercury barometer, atmospheric pressure balances a column of mercury, the height of which can be precisely measured. To increase their accuracy, mercury barometers are often corrected for ambient temperature and the local value of gravity.

Multiple choice evs when there is a disaster disaster and types disasters forest fire

Which of the following instrument is used to measure wind speed?

  1. Barometer

  2. Auxanometer

  3. Anemometer

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

An anemometer is a type of weather instrument that measures wind speed. Some of these instruments measure both wind speed and wind direction. Anemometers are common at weather stations. A cup anemometer is a type of instrument that uses three or four hemispherical cups mounted on horizontal arms on a vertical rod.

Multiple choice evs when there is a disaster disaster and types disasters forest fire

The intensity of earthquake is measured by 

  1. Speedometer

  2. Richter scale

  3. Barometer

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Richter scale is a logarithmic scale used to quantify the magnitude of an earthquake. Speedometers measure vehicle speed, and barometers measure atmospheric pressure.

Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Seismograph is a instrument used to:

  1. Record lightning

  2. Record strength of wind

  3. Record temperature

  4. Record vibrations of earthquakes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The tremors produces waves on the surface of the earth. These are called seismic waves. The waves are recorded by an instrument called seismograph.

Multiple choice physics structure of earth seismic waves and tsunami causes of earthquakes origin of earth and its internal energy transfer of charge lightning safety

Magnitude of earthquake is measured by

  1. electroscope

  2. Richter scale

  3. seismograph

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

Magnitude of earthquake is measured by Richter scale. A electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body.  A seismograph is used to record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon. Coulomb is the unit of electrical charge. 

Multiple choice physics study of sound types of waves sound as a wave of disturbance sound waves are longitudinal waves

Chronometer is?

  1. An clock for determining the longitude of a vessel at sea

  2. An instrument for changing or reversing the direction of electric current

  3. An instrument for measuring the direction and velocity of wind

  4. An instrument for comparing intensities of colours
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chronometer is an instrument for measuring time accurately in spite of motion or variations in temperature, humidity, and air pressure.So it can be used a a clock for determining the longitude of a vessel at sea.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Hygrometer is the instrument used to measure _________.

  1. rainfall

  2. temperature

  3. humidity

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Humidity,

A hygrometer is a weather instrument used to measure the humidity in the atmosphere. There are two main types of hygrometers -- a dry and wet bulb psychrometer and a mechanical hygrometer.

Multiple choice audible, infra and ultra sound with its application study of sound physics

Three different vibrating objects produce three types of sounds X, Y and Z.
Sounds X and Y cannot be heard by a man having normal range of hearing but sound Z can be heard easily.
The sound X is used in hospital to break kidney stones of a patient into fine grains which then get flushed out with Urine. The sound similar to that which is produced during an earthquake before the main shock wave is generated.

Name one device in our homes which can produce sound like Z.

  1. oven

  2. doorbell

  3. no such device is there in our homes.

  4. all devices produce such sound
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ultrasound is used for removing kidney stones.

When ultrasound are targeted on such stone,the stones start vibrating at high frequency. The stone due to this vibratory motion. Breakdown into fine particles. Ultrasounds and infrasounds are not audible to man. Ultrasound have frequency more than 20 kHz. A doorbell can produce an audible sound. 
Infrasound have frequency below 20 Hz
X is ultrasound.
Y is infrasound
Z is audible sound.

Multiple choice meaning and elements of computer system computer in accounting accountancy

Human voice is an example of _______ signal.

  1. Analog

  2. Digital

  3. Electrical

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

Human voice is an example of Analog signal.

An analog signal is any continuous signal for which the time-varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.

Digital signals must have a finite set of possible values. ... That's the big difference between analog and digital waves. Analog waves are smooth and continuous, digital waves are stepping, square, and discrete.

So, in other words, if you're using a 56Kbps modem to access your Internet service provider (ISP), you have an analog connection from your home to the local exchange. But the ISP has a digital subscriber line (DSL) or a digital termination facility from its location to its exchange.

A signal is any kind of detectable quantity used to communicate information. An analog signal is a signal that can be continuously, or infinitely, varied to represent any small amount of change. Pneumatic, or air pressure, signals used to be used predominately in industrial instrumentation signal systems.