Scientific Instruments
Physics · वैज्ञानिक उपकरण · 24 facts
Thermometer measures temperature; clinical thermometer range 35-42 degree C
Barometer measures atmospheric pressure (invented by Torricelli)
Hygrometer measures humidity in the atmosphere
Ammeter measures electric current; connected in SERIES in circuit
Voltmeter measures voltage/potential difference; connected in PARALLEL
Galvanometer detects and measures very small electric currents
Seismograph records earthquake waves (intensity and duration)
Richter Scale measures magnitude of earthquakes
Anemometer measures wind speed; used in meteorology
Altimeter measures altitude/height above sea level (used in aircraft)
Speedometer measures speed of a vehicle
Odometer measures distance travelled by a vehicle
Tachometer measures rotational speed (RPM) of engine/shaft
Stethoscope: used by doctors to hear heart and lung sounds
Sphygmomanometer measures blood pressure
Lactometer tests purity of milk; Hydrometer measures specific gravity of liquids
Pyrometer measures very high temperatures (e.g., furnace, molten metal)
Manometer measures gas pressure inside a closed container
Periscope: used in submarines to see above water surface using mirrors
Telescope: sees distant objects; Microscope: sees very small objects
Dynamo converts mechanical energy into electrical energy
Transformer changes voltage level (step-up or step-down) of AC current
Geiger-Muller Counter detects and measures radioactivity
Calorimeter measures quantity of heat absorbed or released