Physics Measuring Instruments

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. 

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.

A calorimeter is an object used for calorimetry or the process of measuring the heat of chemical reactions or physical changes.

Yes, it is correct. A metre scale is used to measure lengths from 10^–3 m to 10^-2 m.

Nanotechnology is applied in microscopes.

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.

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.

This is the correct answer. Galvanometer is used for detecting current in an electric generator.

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.

Plasmonics is a field of nanophotonics that holds the promise of molecular-size optical device technology. One of the sizzling hot topics within nanophotonics is plasmonics, which holds the promise of a class of subwavelength-scale optoelectronic components that could form the building blocks of a chip-based optical device technology that is scaleable to molecular dimensions.

Manometer is used for measuring fluid pressure.

Seismograph is the instrument used to measure the magnitude of earthquakes by sensing the motions of the outer crust of the earth.

This answer is correct as GM counter popularly known as Geiger Muller counter is used for ionizing radiations and not for IR radiations.

Blood pressure is measured by Sphygmomanometer.

Cryogenics is the branch of physics concerned with the production and behavior of materials at extremely low temperatures, typically below -150°C. It has applications in preserving biological materials, superconductivity research, and rocket fuel storage.