Physics · General Awareness

Physics Measuring Instruments

1,123 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 evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

When a liquid thermometer is held in direct sunlight,

  1. It will accurately measure the air temperature

  2. It will measure a much higher temperature than that of the air

  3. It will measure a much lower temperature than that of the air

  4. It will measure the temperature of the sun rather than the air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When a thermometer is in direct sunlight, it absorbs solar radiation, causing the liquid inside to expand more than it would from the air temperature alone, leading to an artificially high reading.

Multiple choice evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

Which of the following records everyday temperature?

  1. Maximum thermometer

  2. Minimum thermometer

  3. Maximum-minimum thermometer

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

A maximum-minimum thermometer is designed to record the highest and lowest temperatures reached over a specific period, typically 24 hours.

Multiple choice evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

The instrument for measuring rainfall is

  1. Barometer

  2. Rain gauge

  3. Thermometer

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

A rain gauge is a specialized instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation over a set period.

Multiple choice evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

The weather reports use thermometer to measure the

  1. Minimum temperature

  2. Maximum temperature

  3. Maximum and minimum temperature

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

Weather reports typically provide the daily temperature range, which is defined by the maximum temperature reached during the day and the minimum temperature reached at night.

Multiple choice evs weather, climate and adaptations of animals to climate weather, climate and adaptation of animals to different climates climate and weather atmosphere and its components

The instrument that measures temperature, pressure, and humidity at various altitudes in the atmosphere:

  1. Barograph

  2. Radiosonde

  3. Aneroid barometer

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

A radiosonde is a weather instrument carried by a balloon that measures and transmits vertical profiles of temperature, pressure, and humidity as it ascends through the atmosphere.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

________ is an instrument used to measure the atmospheric pressure.

  1. Barometer

  2. Calorimeter

  3. Thermometer

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

Barometer is the instrument used to measure atmospheric pressure.

calorimeter and thermometer is used to measure temperatture.
speedometer is used to measure the speed of the vehicles.
so option (A) is correct

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The empty space above mercury in a simple barometer is called _______vaccum

  1. pressure

  2. barometric

  3. torricellian

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

Torricellian vacuum
The vacuum formed when a long tube, closed at one end and filled with mercury, is inverted into a mercury reservoir so that the open end of the tube is below the surface of the mercury. The pressure inside the Torricellian vacuum is the vapour pressure of mercury, about $103\ torr.$

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

Barometer is used for measuring:

  1. Liquid pressure

  2. Thrust

  3. Atmospheric pressure

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

A barometer is a device used for measuring atmospheric pressure.

A classic mercury barometer is constructed from a 3-foot glass tube that is open at one end and sealed at the opposite end. The glass tube is filled with liquid mercury and rests upside-down in a reservoir of mercury. As the mercury moves down the glass tube, a vacuum is created. When the atmospheric pressure above the reservoir increases, the mercury inside the tube rises. As atmospheric pressure decreases the mercury moves down the tube, into the reservoir.The change in the mercury level in the glass tube is equal to the pressure exerted by the air above the reservoir and is measured using the scale marked on the glass tube. 

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

A manometer is used to measure

  1. Height

  2. Pressure

  3. liquid density

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

A manometer is any device used to measure pressure. However, the word manometer is commonly used to mean a pressure sensor which detects pressure change by means of liquid in a tube.
Manometers are differential pressure sensors. A differential pressure sensor measures the difference between a pressure being applied to it and a reference pressure (often atmospheric pressure). 

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

Atmospheric pressure is measured by

  1. Barometer

  2. Manometer

  3. Screw gauge

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

Answer is A.

A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. A simple barometer consists of a long glass tube (closed at one end, open at the other) filled with mercury and turned upside down into a container of mercury. The barometer works by balancing the mercury in the glass tube against the outside air pressure, just like a set of scales. As air pressure increasesthat is, as the air becomes heavierit pushes more of the mercury up into the tube. As air pressure decreases, more of the mercury drains from the tube. So the level of mercury in the tube provides a precise measure of air pressure.