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.

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Physics Measuring Instruments Questions

Multiple choice

Which of the following instruments is used to measure the surface pressure of an exoplanet?

  1. Spectrograph

  2. Photometer

  3. Interferometer

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

Spectrography can be used to measure the surface pressure of an exoplanet by analyzing the absorption lines in the exoplanet's atmosphere.

Multiple choice

Which of the following instruments is used to measure the magnetic field of an exoplanet?

  1. Spectrograph

  2. Photometer

  3. Interferometer

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

Spectrography can be used to measure the magnetic field of an exoplanet by analyzing the Zeeman effect in the exoplanet's atmosphere.

Multiple choice

Which of the following instruments is used to measure the rotation period of an exoplanet?

  1. Spectrograph

  2. Photometer

  3. Interferometer

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

Photometry can be used to measure the rotation period of an exoplanet by observing the variation in the exoplanet's brightness as it rotates.

Multiple choice

What was the name of the medieval astronomical instrument used to measure the altitude of the sun above the horizon?

  1. Astrolabe

  2. Sextant

  3. Quadrant

  4. Cross-staff
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cross-staff was a medieval astronomical instrument used to measure the altitude of the sun above the horizon. It consisted of two pieces of wood or metal arranged in a cross shape.

Multiple choice

Which of the following measurement devices is commonly used to measure illuminance levels?

  1. Lux meter

  2. Spectrometer

  3. Power meter

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

A lux meter is a device specifically designed to measure illuminance levels, which is the amount of light falling on a surface.

Multiple choice

Which type of water sports equipment is used to measure wind speed and direction?

  1. Anemometer

  2. Barometer

  3. Compass

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

An anemometer is a device used to measure wind speed and direction, which is important information for water sports enthusiasts.

Multiple choice

Which type of water sports equipment is used to measure the depth of water?

  1. Depth sounder

  2. Compass

  3. Anemometer

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

A depth sounder is a device used to measure the depth of water, which is important for navigation and safety in water sports.

Multiple choice

Which of the following is not a type of AR sensor?

  1. Accelerometer

  2. Gyroscope

  3. Magnetometer

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

A barometer is not a type of AR sensor, as it is used to measure atmospheric pressure, which is not relevant to AR applications.

Multiple choice

Which of the following is a common method for measuring the focal length of a lens?

  1. Autocollimation

  2. Lensometer

  3. Spherometer

  4. Focal plane array
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A lensometer is a device used to measure the focal length of a lens by focusing a collimated beam of light on the lens and measuring the distance between the lens and the focal point.

Multiple choice

Which of the following is a common method for measuring the thickness of optical coatings?

  1. Ellipsometer

  2. Refractometer

  3. Polarimeter

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

An ellipsometer is a device used to measure the thickness of optical coatings by analyzing the change in polarization state of light reflected from the coating.

Multiple choice

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

  1. Anemometer

  2. Barometer

  3. Thermometer

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

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

Multiple choice

What is the name of the instrument used to measure atmospheric pressure?

  1. Barometer

  2. Thermometer

  3. Anemometer

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

A barometer is a device used to measure atmospheric pressure, typically consisting of a sealed glass tube containing mercury or another liquid.

Multiple choice

What is the name of the instrument used to measure temperature?

  1. Thermometer

  2. Barometer

  3. Anemometer

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

A thermometer is a device used to measure temperature, typically consisting of a glass tube containing a liquid, such as mercury or alcohol, that expands or contracts with changes in temperature.

Multiple choice

What are some of the instruments that are used to study the CMB?

  1. Telescopes

  2. Radio telescopes

  3. Satellites

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

Telescopes, radio telescopes, and satellites are all used to study the CMB.

Multiple choice

What are the two main types of gravimetric analysis?

  1. Precipitation gravimetry and volatilization gravimetry

  2. Precipitation gravimetry and combustion gravimetry

  3. Precipitation gravimetry and electrodeposition gravimetry

  4. Precipitation gravimetry and complexation gravimetry
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The two main types of gravimetric analysis are precipitation gravimetry and volatilization gravimetry.