Electric letter symbols are used in electrical engineering and physics to represent various physical quantities, components, and concepts. Here is a list of common electric letter symbols and their meanings:

  1. I: Electric Current. Measured in amperes (A).
  2. V: Voltage or Electric Potential Difference. Measured in volts (V).
  3. R: Resistance. Measured in ohms (Ω).
  4. C: Capacitance. Measured in farads (F).
  5. L: Inductance. Measured in henrys (H).
  6. P: Power. Measured in watts (W).
  7. Q: Electric Charge. Measured in coulombs (C).
  8. E: Electromotive Force (EMF) or Electric Field. EMF measured in volts (V); Electric Field measured in volts per meter (V/m).
  9. B: Magnetic Flux Density. Measured in teslas (T).
  10. Z: Impedance. Measured in ohms (Ω).
  11. Y: Admittance. The reciprocal of impedance, measured in siemens (S).
  12. S: Electric Conductance. Measured in siemens (S).
  13. G: Conductance, often used interchangeably with S. Measured in siemens (S).
  14. F: Frequency. Measured in hertz (Hz).
  15. W: Energy or Work. Measured in joules (J).
  16. H: Magnetic Field Strength. Measured in amperes per meter (A/m).
  17. D: Electric Displacement Field. Measured in coulombs per square meter (C/m²).
  18. K: Dielectric Constant or Relative Permittivity of a material.
  19. T: Period of time or Time constant in circuits. Measured in seconds (s).
  20. Φ (Phi): Magnetic Flux. Measured in webers (Wb).

These symbols form the basis of electrical and electronic formulae and equations, allowing engineers and scientists to communicate complex information efficiently and accurately.