Physics · 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.

Pressure and humidity instrumentsElectrical measuring devicesMedical physics toolsNavigational instruments

Physics Measuring Instruments Questions

Multiple choice

What is kink?

  1. It is a liquid, used in thermometer to measure the temperature in the extreme cold climate.

  2. It is a bend in the capillary tube of a clinical thermometer.

  3. It is an element that is used in a laboratory thermometer.

  4. It is an abbreviated name of inventor of clinical thermometer.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The kink is a bend in the capillary tube of a clinical thermometer. It prevents the mercury from falling back after the thermometer is removed from the patient's mouth. 

Multiple choice

Why does the clinical thermometer dipped in an antiseptic solution before getting the temperature of a patient?

  1. To keep a patient safe from further infection.

  2. To get accurate measure of temperature of the patient.

  3. To give an extra shine to view the readings.

  4. To measure the temperature beyond the limits of calibration point.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The clinical thermometer is dipped in an antiseptic solution prior to use to keep a patient safe from further infection. It is frequently used by the patients suffering from different diseases. 

Multiple choice

Which of the following methods uses cut twig for measuring transpiration?

  1. Bell jar

  2. Potometer

  3. 4-leaf experiment

  4. Cobalt chloride paper

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A potometer is a device used for measuring the rate of water uptake of a leafy shoot. The causes of water uptake are photosynthesis and transpiration. Potometer method uses cut twig for measuring transpiration.

Multiple choice

What is the name of the instrument used to measure the amount of rainfall?

  1. Thermometer

  2. Rain gauge

  3. Seismometer

  4. Anemometer

  5. Barometer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rain gauge is an instrument, which measures the amount of rainfall. When rain falls, many times it is absorbed into the earth, making it hard to figure out how much rain fell. Weather forecasters use rain gauges to provide accurate information about rainfall.

Multiple choice

Which of the following devices is used by pilots & navigators to find the direction?

  1. Barometer

  2. Thermometer

  3. Magnetic compass

  4. Magnetic pen

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A magnetic compass aligns with Earth's magnetic field to show cardinal directions. Barometers measure atmospheric pressure, thermometers measure temperature, and magnetic pens are not navigational instruments - only the compass serves the purpose of direction-finding.

Multiple choice

Consider the following statements regarding Tachometer. (a) A photo-diode is being used as a frequency counter or tachometer. (b) A rotating disk is connected to a rotating shaft. The rotating disk has two hole in it. (c) A frequency counter is used to count the number of electrical pulses generated. Which of the above statements is/are true?

  1. Only (a)

  2. Only (c)

  3. Only (b)

  4. All of the above

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement (a) is false. A phototransistor is being used as a frequency counter or tachometer. Statement (b) is false. A rotating disk is connected to a rotating shaft. The rotating disk has one hole in it. Statement (c) is true. A frequency counter is used to count the number of electrical pulses generated.