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Units – Everyday Science

Measurement Units & Physical Quantities

Units play a fundamental role in understanding everyday science and physical phenomena. They are used to measure quantities such as force, temperature, electric current, and heat in a standardized way. This section provides a clear and quick reference to commonly used scientific units, helping students prepare for exams, quizzes, and competitive MCQs by strengthening their basic measurement concepts.

Physical QuantityMeasuring Instrument
ForceNewton/ Dyne
TemperatureKelvin/ Celsius/ Degree
CurrentAmpere
HeatJoule/ Calorie/ BTU
PressurePascal/Torr
RadioactivityBecquerel/Curie/Rutherford
Atomic energyRydberg/Joule
VoltageVolt
Electric Potential DifferenceVolt
Electric ChargeCoulomb
PowerWatt
ResistanceOhm
ConductivityMho
EnergyJoule/ Erg
Distance Between Stars And PlanetsLight Year
WavelengthAngstrom
VolumeAcre-Foot/Litre
FrequencyHertz
Rate of flow of waterCusec
LengthMeter/Fermi/Parsec
Optical Power Of A Lens or A Curved MirrorDioptre
Plane AngleRadian
Luminous IntensityCandela
Amount of SubstanceMole
Rate Of Decay Of Radioactive MaterialRutherford
Sedimentation RateSVEDBERG Unit
InductionHenry
Magnetic fluxMaxwell/ Weber
Magnetic Flux Density/Magnetic InductivityTelsa/Gauss
Electric ConductanceSiemens
AngleDegree
Solid AngleSteradian
TorqueFoot-Pound
Mechanical work/EnergyErg
Magneto Motive ForceGilbert