Physics ยท 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
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Kaleidoscope
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Spectroscope
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Periscope
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Telescope
C
Correct answer
Explanation
A periscope is an optical instrument that uses mirrors or prisms to allow viewing objects that are not in the direct line of sight. In submarines, periscopes enable crew members to observe the surface while remaining submerged. Kaleidoscopes create symmetrical patterns, spectroscopes analyze light spectra, and telescopes magnify distant objects - none serve this specific purpose.
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kaleidoscope
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periscope
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spectroscope
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telescope
B
Correct answer
Explanation
A periscope is an optical instrument that uses mirrors or prisms to allow viewing objects that are not in the direct line of sight, essential for submarines to observe the surface while submerged. It works on the principle of multiple reflections. Kaleidoscopes create symmetrical patterns, spectroscopes analyze light spectra, and telescopes magnify distant objects but cannot see around obstacles.
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Barometer
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Hydrometer
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Polygraph
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Seismograph
D
Correct answer
Explanation
A seismograph measures earthquake intensity by recording ground vibrations. Barometers measure atmospheric pressure, hydrometers measure liquid density, and polygraphs detect physiological responses for lie detection.
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Saccharimeter
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Ammeter
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Manometer
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Lactometer
C
Correct answer
Explanation
A manometer is a scientific instrument used to measure pressure. Amsmeter measures current, lactometer measures milk purity, and saccharimeter measures sugar solutions.
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telescopes
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kaleidoscopes
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periscopes
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microscopes
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low temperatures
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high temperatures
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It measures the heat needed to melt ice
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Nothing
B
Correct answer
Explanation
A pyrometer is a specialized temperature measuring device designed for high temperatures, typically above 600 degrees Celsius. It works by measuring the thermal radiation emitted by hot objects rather than using direct contact like conventional thermometers. This makes it ideal for measuring temperatures in furnaces, kilns, and metallurgical processes where traditional thermometers would be destroyed.
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Hydrometer
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Geiger Counter
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Seismometer
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Ammeter
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sphygmomanometer
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Thermometer
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Gyrometer
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Tempometer
A
Correct answer
Explanation
A sphygmomanometer is the medical instrument used to measure blood pressure. It consists of an inflatable cuff and a mercury or aneroid manometer. Thermometers measure temperature, not blood pressure.
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Seismograph
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L.A.G.E.O.S (Laser Geodynamic Satellite)
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EQMDCENT (EarthQuake Device of the Century)
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Pendulum
C
Correct answer
Explanation
Seismographs, LAGEOS satellite, and pendulums are all real earthquake-measuring or monitoring devices. 'EQMDCENT (EarthQuake Device of the Century)' appears to be a made-up name and does not exist as an actual earthquake measurement instrument. This is a test of identifying fake scientific instruments.
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Saccharimeter
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Ammeter
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Manometer
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Lactometer
C
Correct answer
Explanation
A manometer is an instrument used to measure pressure, particularly gas or liquid pressure. Saccharimeter measures sugar concentration, ammeter measures electric current, and lactometer measures milk purity. Manometers are essential in various scientific and industrial applications.
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Quantity of liquid
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Length of light waves
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Length of cables
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Speed of ships
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Barometer
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Hydrometer
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Polygraph
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Seismograph
D
Correct answer
Explanation
A seismograph measures earthquake intensity and records seismic waves. Barometers measure atmospheric pressure, hydrometers measure liquid density, and polygraphs detect physiological responses during questioning.
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Humidity
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Pressure
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Temperature
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Length
C
Correct answer
Explanation
A thermometer is a scientific instrument designed to measure temperature. It works on principles like thermal expansion of liquids (mercury or alcohol) or electrical resistance changes. Hygrometers measure humidity, barometers measure pressure, and rulers or tape measures measure length.
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Sound
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Air pressure
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Rainfall
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Shoe size
C
Correct answer
Explanation
A pluviometer is a scientific instrument used to measure rainfall and precipitation. It collects and quantifies the amount of liquid precipitation over time. Sound is measured by acoustic instruments, air pressure by barometers, and pluviometers are not related to shoe measurements.
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Ammeter
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Lactometer
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Manometer
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Saccharimeter
C
Correct answer
Explanation
A manometer is the specific instrument designed to measure pressure, particularly gas pressure or pressure differences. Ammeters measure electric current, lactometers check milk purity, and saccharimeters measure sugar concentration. Understanding instrument purposes is key in physics measurements.