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

What is the name of the instrument used to measure the time of day?

  1. Sundial

  2. Astrolabe

  3. Quadrant

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

A sundial is an instrument used to measure the time of day. It consists of a pointer that casts a shadow on a marked surface.

Multiple choice

What was the name of the instrument that C. V. Raman used to study the Raman effect?

  1. Spectrometer

  2. Raman spectrometer

  3. Interferometer

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

C. V. Raman used a Raman spectrometer to study the Raman effect.

Multiple choice

Which instrument is commonly used to measure horizontal angles in surveying?

  1. Theodolite

  2. Level

  3. Total station

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

A theodolite is a precision instrument used to measure horizontal and vertical angles. It is commonly used in surveying to establish control points and measure angles between points.

Multiple choice

Which diagnostic technique is commonly used to measure the electron density in a plasma?

  1. Interferometry

  2. Spectroscopy

  3. Langmuir Probe

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

Interferometry is a diagnostic technique that utilizes the interference of electromagnetic waves to determine the electron density in a plasma. By measuring the phase shift or intensity changes in the transmitted or reflected waves, the electron density can be inferred.

Multiple choice

What is the primary purpose of using a bolometer in plasma diagnostics?

  1. Measuring Plasma Potential

  2. Measuring Electron Density

  3. Measuring Ion Temperature

  4. Measuring Radiated Power
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A bolometer is a diagnostic tool used to measure the total radiated power emitted by a plasma. It is typically composed of a temperature-sensitive material that converts the incident radiation into a measurable electrical signal.

Multiple choice

Which diagnostic technique is commonly employed to measure the ion temperature in a plasma?

  1. Langmuir Probe

  2. Spectroscopy

  3. Magnetic Probe

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

Doppler spectroscopy is a diagnostic technique that utilizes the Doppler shift in spectral lines to determine the ion temperature in a plasma. By measuring the shift in the wavelength or frequency of emitted or absorbed light, the ion velocity distribution and temperature can be inferred.

Multiple choice

Which diagnostic technique is commonly used to measure the electric field in a plasma?

  1. Langmuir Probe

  2. Spectroscopy

  3. Magnetic Probe

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

Stark spectroscopy is a diagnostic technique that utilizes the Stark effect to measure the electric field in a plasma. The Stark effect refers to the splitting of spectral lines in the presence of an electric field. By analyzing the splitting of spectral lines, the electric field strength can be determined.

Multiple choice

Which diagnostic technique is commonly used to measure the plasma rotation velocity?

  1. Magnetic Probe

  2. Spectroscopy

  3. Doppler Spectroscopy

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

Doppler spectroscopy can also be used to measure the plasma rotation velocity. By analyzing the Doppler shift in spectral lines due to the plasma's rotation, the velocity of the plasma can be determined.

Multiple choice

Which instrument provides pilots with information about the aircraft's attitude relative to the horizon?

  1. Airspeed Indicator

  2. Altimeter

  3. Attitude Indicator

  4. Vertical Speed Indicator
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The attitude indicator, also known as the artificial horizon, provides pilots with visual cues regarding the aircraft's orientation relative to the horizon.

Multiple choice

Which instrument provides pilots with information about the aircraft's speed relative to the surrounding air?

  1. Airspeed Indicator

  2. Altimeter

  3. Attitude Indicator

  4. Vertical Speed Indicator
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The airspeed indicator provides pilots with accurate information about the aircraft's speed relative to the surrounding air, which is crucial for maintaining safe flight conditions.

Multiple choice

What is the name of the equipment used to measure the distance in a race?

  1. Tape measure

  2. Stopwatch

  3. Finish line

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

A tape measure is used to measure the distance between the starting line and the finish line.

Multiple choice

What is the name of the astronomical instrument used to measure the altitude of celestial bodies?

  1. Astrolabe

  2. Sextant

  3. Quadrant

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

The quadrant is an astronomical instrument used to measure the altitude of celestial bodies. It is a quarter-circle divided into degrees and minutes and is used to measure the angular distance between the horizon and a celestial body.

Multiple choice

Which of the following is a device used to measure the depth of water beneath a houseboat?

  1. Depth finder

  2. Fish finder

  3. GPS

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

Depth finders are electronic devices that measure the depth of water beneath a boat, providing valuable information for navigation and fishing.

Multiple choice

Which instrument is commonly used to measure the pH of water?

  1. pH meter

  2. Spectrophotometer

  3. Gas chromatograph

  4. Atomic absorption spectrometer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A pH meter is a specialized instrument used to measure the pH of water, which indicates its acidity or alkalinity.

Multiple choice

Which of the following is NOT a common sensor used in Mechatronics?

  1. Accelerometer

  2. Gyroscope

  3. Thermistor

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

Thermistors are not typically used in Mechatronics, as they are primarily used for measuring temperature.