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 are the different types of photometers?

  1. CCD photometers, photomultiplier tubes, and bolometers.

  2. CCD photometers, spectrometers, and bolometers.

  3. CCD photometers, photomultiplier tubes, and interferometers.

  4. CCD photometers, spectrometers, and interferometers.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CCD photometers, photomultiplier tubes, and bolometers are the most common types of photometers used in astronomy.

Multiple choice

The gnomon is a simple but effective instrument used to measure what?

  1. The altitude of the sun

  2. The time of day

  3. The direction of true north

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

The gnomon is a vertical rod or pillar that casts a shadow. The length of the shadow can be used to measure the altitude of the sun.

Multiple choice

What is the term used for the device used to measure the time of swimmers in a competition?

  1. Stopwatch

  2. Timing mat

  3. Electronic scoreboard

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

The term used for the device used to measure the time of swimmers in a competition is timing mat.

Multiple choice

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

  1. Anemometer

  2. Barometer

  3. Hygrometer

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

An anemometer is an instrument used to measure wind speed.

Multiple choice

Which of the following is a common method for measuring ocean currents?

  1. Satellite Altimetry

  2. Ocean Buoys

  3. Shipboard Measurements

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

Satellite Altimetry, Ocean Buoys, and Shipboard Measurements are all commonly used methods for measuring ocean currents. Satellite Altimetry measures sea surface height, which can be used to infer ocean currents. Ocean Buoys are equipped with instruments to measure current speed and direction. Shipboard Measurements involve deploying instruments from research vessels to directly measure ocean currents.

Multiple choice

Which of the following is NOT a type of navigation instrument used in aircraft?

  1. Airspeed Indicator

  2. Altimeter

  3. Attitude Indicator

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

Turn Coordinator is not a type of navigation instrument used in aircraft. It is a flight instrument that indicates the rate of turn of the aircraft.

Multiple choice

What is the instrument used to measure the altitude of a celestial body?

  1. Sextant

  2. Astrolabe

  3. Compass

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

A sextant is the instrument used to measure the altitude of a celestial body.

Multiple choice

What is the instrument used to measure the azimuth of a celestial body?

  1. Sextant

  2. Astrolabe

  3. Compass

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

A compass is the instrument used to measure the azimuth of a celestial body.

Multiple choice

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

  1. Sextant

  2. Astrolabe

  3. Compass

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

A chronometer is the instrument used to measure the time of day.

Multiple choice

What is the recommended procedure for testing a marine electrical system?

  1. Inspect the wiring and connections

  2. Test the electrical components

  3. Measure the voltage and current

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

When testing a marine electrical system, it is important to inspect the wiring and connections, test the electrical components, and measure the voltage and current.

Multiple choice

What is the primary function of a telescope?

  1. To magnify distant objects

  2. To collect and focus light

  3. To measure the distance to stars

  4. To detect the presence of extraterrestrial life
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The primary function of a telescope is to collect and focus light from distant objects, allowing astronomers to observe them in greater detail.

Multiple choice

What is the role of a detector in astronomical observations?

  1. To convert light into electrical signals

  2. To amplify the signal from the telescope

  3. To process and analyze the data

  4. To store the data for future use
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The role of a detector in astronomical observations is to convert the light collected by the telescope into electrical signals, which can then be processed and analyzed.

Multiple choice

Which type of detector is commonly used in optical astronomy?

  1. Charge-coupled device (CCD)

  2. Photomultiplier tube (PMT)

  3. Bolometer

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

Charge-coupled devices (CCDs) are commonly used in optical astronomy as detectors, as they offer high sensitivity, low noise, and the ability to capture images with high resolution.

Multiple choice

Which of the following is NOT a type of agricultural sensor?

  1. Soil Moisture Sensors

  2. Temperature and Humidity Sensors

  3. Crop Yield Sensors

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

Crop yield sensors are not typically considered agricultural sensors, as they measure the output rather than environmental or crop conditions.

Multiple choice

What was the name of the scientific instrument that allowed scientists to study the composition of gases?

  1. The Spectroscope

  2. The Microscope

  3. The Telescope

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

The spectroscope allowed scientists to study the composition of gases by analyzing the light emitted or absorbed by them.