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

Multiple choice

What is the purpose of a multimeter?

  1. Measuring voltage

  2. Measuring current

  3. Measuring resistance

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

A multimeter is a versatile tool that can measure voltage, current, and resistance, making it useful for electrical troubleshooting and testing.

Multiple choice

Which of the following is NOT a common type of sensor used in IoT devices to measure pressure?

  1. Barometer

  2. Piezoelectric sensor

  3. Strain gauge

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

Thermistors are not typically used to measure pressure, but rather to measure temperature.

Multiple choice

What is the purpose of a mobile device's barometer?

  1. To measure the device's orientation

  2. To measure the device's acceleration

  3. To measure the device's speed

  4. To measure the device's air pressure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A barometer is used to measure the device's air pressure.

Multiple choice

What is the purpose of a barometer on a smartwatch?

  1. To measure altitude

  2. To measure air pressure

  3. To measure temperature

  4. To measure humidity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Barometers are used to measure air pressure, which can be useful for tracking changes in weather conditions.

Multiple choice

Which type of sensor is commonly used in pulse oximeters to measure blood oxygen saturation?

  1. Thermistor

  2. Photodiode

  3. Piezoelectric sensor

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

Pulse oximeters utilize photodiodes to measure blood oxygen saturation by transmitting and detecting light of specific wavelengths through the patient's finger or earlobe.

Multiple choice

Which of the following is a common type of biosensor used to detect the presence of specific molecules or substances in a sample?

  1. Accelerometer

  2. Gyroscope

  3. Immunosensor

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

Immunosensors are biosensors that utilize antibodies or antigens to detect the presence of specific molecules or substances, such as proteins, hormones, or pathogens, in a sample.

Multiple choice

Which of the following is a common type of sensor used in medical devices to measure temperature?

  1. Thermistor

  2. Photodiode

  3. Piezoelectric sensor

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

Thermistors are commonly used in medical devices to measure temperature due to their high sensitivity and ability to detect small changes in temperature.

Multiple choice

Which type of sensor is commonly used in medical devices to measure blood pressure?

  1. Thermistor

  2. Photodiode

  3. Piezoelectric sensor

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

Strain gauges are commonly used in medical devices to measure blood pressure by detecting the deformation of a sensor element caused by the pressure exerted by the blood.

Multiple choice

Which of the following is a common type of sensor used in medical devices to measure respiratory rate?

  1. Thermistor

  2. Photodiode

  3. Piezoelectric sensor

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

Piezoelectric sensors are commonly used in medical devices to measure respiratory rate by detecting the movement of the chest or abdomen during breathing.

Multiple choice

Which technology is used to measure wind speed and direction at a specific location?

  1. Anemometer

  2. Wind vane

  3. LiDAR

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

Wind speed and direction can be measured using various technologies, including anemometers, wind vanes, and LiDAR (Light Detection and Ranging). Anemometers measure wind speed, wind vanes indicate wind direction, and LiDAR provides detailed information about wind speed and direction over a larger area.

Multiple choice

Which equipment is used to measure the distance traveled by a runner in track and field events?

  1. Stopwatch

  2. Tape Measure

  3. Measuring Wheel

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

A measuring wheel is a device specifically designed to accurately measure the distance covered by runners in track and field events.

Multiple choice

Which equipment is used to measure the speed of a runner or cyclist?

  1. Stopwatch

  2. Tachometer

  3. Speedometer

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

A speedometer is a device used to measure and display the speed of a moving object, such as a runner or cyclist.

Multiple choice

What type of astronomical instrument is used to measure the spectrum of light emitted by celestial objects?

  1. Telescope

  2. Spectrograph

  3. Interferometer

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

A spectrograph is an instrument used to disperse light into its component wavelengths, allowing astronomers to study the chemical composition and physical properties of celestial objects.

Multiple choice

Which of the following is NOT a type of detector commonly used in astronomical instruments?

  1. Charge-coupled device (CCD)

  2. Photomultiplier tube (PMT)

  3. Bolometer

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

Geiger counters are not typically used in astronomical instruments as they are designed to detect ionizing radiation, which is not the primary type of radiation emitted by astronomical objects.

Multiple choice

What is the term for the measurement of blood oxygen levels?

  1. Spirometry

  2. Plethysmography

  3. Oximetry

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

Oximetry is a non-invasive method for measuring blood oxygen levels using a pulse oximeter, which is typically placed on a finger or earlobe.