Physics ยท 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.

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Physics Measuring Instruments Questions

Multiple choice

What is the principle behind the operation of a nephelometer?

  1. It measures the scattering of light by particles in the air

  2. It measures the absorption of light by particles in the air

  3. It measures the size of particles in the air

  4. It measures the mass of particles in the air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A nephelometer is an instrument that measures the amount of light scattered by particles in the air. The amount of scattering is proportional to the concentration of particles in the air.

Multiple choice

Which device is used to measure the strength of an electric current?

  1. Ammeter

  2. Voltmeter

  3. Ohmmeter

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

An ammeter is a device used to measure the strength of an electric current. It is connected in series with the circuit to measure the current flowing through it.

Multiple choice

What is the primary instrument used to measure atmospheric pressure?

  1. Barometer

  2. Thermometer

  3. Anemometer

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

A barometer is a device used to measure atmospheric pressure.

Multiple choice

Which instrument is used to measure wind speed?

  1. Barometer

  2. Thermometer

  3. Anemometer

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

An anemometer is a device used to measure wind speed.

Multiple choice

What is the instrument used to measure wind direction?

  1. Barometer

  2. Windsock

  3. Anemometer

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

A windsock is a device used to measure wind direction.

Multiple choice

Which instrument is used to measure air temperature?

  1. Barometer

  2. Thermometer

  3. Anemometer

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

A thermometer is a device used to measure air temperature.

Multiple choice

What is the instrument used to measure humidity?

  1. Barometer

  2. Thermometer

  3. Anemometer

  4. Psychrometer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A psychrometer is a device used to measure humidity.

Multiple choice

What are the different types of ICP-OES instruments?

  1. Axial ICP-OES

  2. Radial ICP-OES

  3. Direct current plasma (DCP) ICP-OES

  4. Inductively coupled plasma mass spectrometry (ICP-MS)
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

There are three main types of ICP-OES instruments: axial ICP-OES, radial ICP-OES, and direct current plasma (DCP) ICP-OES. Axial ICP-OES instruments have the ICP torch aligned parallel to the spectrometer. Radial ICP-OES instruments have the ICP torch aligned perpendicular to the spectrometer. DCP ICP-OES instruments use a direct current plasma instead of an inductively coupled plasma. Inductively coupled plasma mass spectrometry (ICP-MS) is a related technique that uses an ICP to generate ions, which are then separated by their mass-to-charge ratio.

Multiple choice

What are the main factors that affect the accuracy and precision of ICP-OES measurements?

  1. Sample preparation

  2. Calibration

  3. Interferences

  4. Instrument stability
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The accuracy and precision of ICP-OES measurements are affected by a number of factors, including sample preparation, calibration, interferences, and instrument stability. Sample preparation is important to ensure that the sample is representative of the material being analyzed and that it is in a form that can be easily introduced into the ICP. Calibration is important to establish the relationship between the emission intensity and the concentration of the analyte in the sample. Interferences can occur when other elements in the sample emit light at the same wavelengths as the analyte. Instrument stability is important to ensure that the ICP-OES instrument is operating properly and that the results are reproducible.

Multiple choice

What are the different types of ICP-OES instruments?

  1. Axial ICP-OES

  2. Radial ICP-OES

  3. Direct current plasma (DCP) ICP-OES

  4. Inductively coupled plasma mass spectrometry (ICP-MS)
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

There are three main types of ICP-OES instruments: axial ICP-OES, radial ICP-OES, and direct current plasma (DCP) ICP-OES. Axial ICP-OES instruments have the ICP torch aligned parallel to the spectrometer. Radial ICP-OES instruments have the ICP torch aligned perpendicular to the spectrometer. DCP ICP-OES instruments use a direct current plasma instead of an inductively coupled plasma. Inductively coupled plasma mass spectrometry (ICP-MS) is a related technique that uses an ICP to generate ions, which are then separated by their mass-to-charge ratio.

Multiple choice

What are the main factors that affect the accuracy and precision of ICP-OES measurements?

  1. Sample preparation

  2. Calibration

  3. Interferences

  4. Instrument stability
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The accuracy and precision of ICP-OES measurements are affected by a number of factors, including sample preparation, calibration, interferences, and instrument stability. Sample preparation is important to ensure that the sample is representative of the material being analyzed and that it is in a form that can be easily introduced into the ICP. Calibration is important to establish the relationship between the emission intensity and the concentration of the analyte in the sample. Interferences can occur when other elements in the sample emit light at the same wavelengths as the analyte. Instrument stability is important to ensure that the ICP-OES instrument is operating properly and that the results are reproducible.

Multiple choice

What are the different types of ICP-OES instruments?

  1. Axial ICP-OES

  2. Radial ICP-OES

  3. Direct current plasma (DCP) ICP-OES

  4. Inductively coupled plasma mass spectrometry (ICP-MS)
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

There are three main types of ICP-OES instruments: axial ICP-OES, radial ICP-OES, and direct current plasma (DCP) ICP-OES. Axial ICP-OES instruments have the ICP torch aligned parallel to the spectrometer. Radial ICP-OES instruments have the ICP torch aligned perpendicular to the spectrometer. DCP ICP-OES instruments use a direct current plasma instead of an inductively coupled plasma. Inductively coupled plasma mass spectrometry (ICP-MS) is a related technique that uses an ICP to generate ions, which are then separated by their mass-to-charge ratio.

Multiple choice

What is the name of the instrument used to measure wind speed?

  1. Anemometer

  2. Barometer

  3. Thermometer

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

An anemometer is an instrument used to measure wind speed, typically consisting of rotating cups or vanes that are moved by the wind.