Meaning of Physical symbols for Competitive Exams
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Quantity  Symbol  SI unit  Symbol for SI Unit  NonSI unit used 
Absorbed dose 
 Gray 
 
Acceleration 
 Metre per second squared 
 
Acc. due to gravity 
 Metre per second squared 
 
Activity 
 Becquerel 
 
Amount of substance 
 Mole 
 
Amplitude 
 Metre 
 
Angle 
 Radian 


Angular velocity 
 Radian per second 


Area 
 Metre squared 


Atomic number 
 
Capacitance 
 Farad 
 
concentration 
 Mole per liter 


Critical angle 
 
density 
 Kilogram per meter cubed 


Displacement 
 Meter 
 
Dose equivalent 
 Sievert 
 
Electric current 
 Ampere 
 
Electric field strength 
 Volt per metre 
 
Electronic charge 
 Coulomb 
 
Energy (electrical) 
 Joule 


Energy (heat) 
 Joule 
 
Energy (kinetic) 
 Joule 
 
Energy (potential) 
 Joule 
 
Energy (food)  Joule 

 
Enthalpy 
 Joule 
 
Focal length 
 Meter 
 
Frequency 
 Hertz 
 
half life 
 Second 
 
Length (distance) 
 Metre 
 
Magnetic flux 
 Weber 
 
Magnetic flux density 
 Tesla 
 
Magnification 
 
Mass 
 Kilogram 


Mass number 
 
Molarity  Mole per liter 
 
Moment of a force 
 Newton metre 
 
Moment of inertia 
 Kilogram metre squared 
 
Momentum 
 Kilogram metre per second 
 
Permittivity  ε  Farad per metre 
 
Periodic time 
 Second 
 
Power 
 Watt 
 
Refractive index 
 
Resistance 
 ohm 
 
Resistivity 
 ohm meter 
 
Speed 
 Meter per second 


Sound intensity 
 Watt per meter squared 
 
Sound intensity level 

 
Specific heat capacity 
 Joule per kilogram per kelvin 
 
Strain 
 
Stress 
 Newton per meter squared 
 
Temperature 
 Kelvin 
 
Temperature 
 Newton 
 
Change in temperature 
 Kelvin 
 
Tension 
 Newton 
 
Thermal conductivity 
 Watt per meter per kelvin 
 
Time 
 Second 


Torque 
 Newton metre 
 
Velocity 
 Metre per second 
 
Voltage potential difference 
 Volt 
 
Uvalue  Watt per meter squared per kelvin 
 
Volume 
 Metre cubed 


Wavelength 
 Meter 
 
Weight 
 Newton 
 
Work 
 Joule 
 
Young’s modulus 
 Newton per metre squared 
