Symbol: \(W\) Unit of energy: \(\mathrm{J}\) (Joule) Example: \( W ~=~ 30 \, 000 \, 000 \, \mathrm{J} \) is the energy released when one kilogram of coal is burned.
Symbol: \(\mathit{\Pi}\) Unit of pressure: \(\mathrm{Pa}\) (Pascal) Example: \( \mathit{\Pi} ~=~ 100 \, 000 \, \mathrm{Pa} \) is the air pressure of the earth's atmosphere.
Symbol: \(U\) Unit of voltage: \(\mathrm{V}\) (Volt) Example: \(U ~=~ 100 \, 000 \, 000 \, \mathrm{V} \) is the voltage between a thundercloud and the earth.
Symbol: \(R\) Unit of resistance: \(\mathrm{\Omega}\) (Ohm) Example: \(R ~=~ 100 \, \mathrm{\Omega} \) is the resistance of an ohmic conductor to which 200 volts are applied and through which 2 amps flow.
Symbol: \(E\) Unit of electric field: \( \frac{ \mathrm{V} }{ \mathrm{m} } \) (Volt per meter) Example: \(E ~=~ 1000 \, 000 \, \frac{ \mathrm{V} }{ \mathrm{m} } \) is the electric field between the bottom and top of a thundercloud.
Symbol: \(\class{violet}{B}\) Unit of magnetic field: \( \mathrm{T} \) (Tesla) Example: \(\class{violet}{B} ~=~ 20 \, \mathrm{T} \) creates a superconducting coil in a nuclear fusion reactor.
A capacitor with a certain capacitance in an alternating current circuit.
Inductance
Symbol: \(L\) Unit of inductance: \( \mathrm{H} \) (Henry) Example: \(L ~=~ 500 \, \mathrm{mH} \) is the inductance of a given coil with current flowing through it.
Symbol: \(C\) Unit of thermal capacity: \( \frac{\mathrm{J}}{\mathrm{K}} \) (Joule per Kelvin) Example: \(C ~=~ 4190 \, \frac{\mathrm{J}}{\mathrm{K}} \) is the heat capacity of one liter of water.
