Voltage, Current ,Power

Voltage

• Denoted ∆V and measured in units of electric potential: volts, or joules per coulomb
• Voltage is a representation of the electric potential energy per unit charge.
• Voltage is equal to the work done per unit charge against a static electric field to move the charge between two points
• A voltage may represent either a source of energy (electromotive force)
• Voltage can be caused by static electric fields, by electric current through a magnetic field  

CURRENT

• Net amount of charge (coulombs) (number of electrons x electron charge)flowing past a specified point during a time interval (seconds), usually measured in Amps ( 1Amp = 1coulomb/1second). In typical components and systems the quantity of electrons is quite large and the aggregate charge flow is referred to as electricity.
• An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte 

POWER

• • Electric power, the rate at which electrical energy is transferred by a circuit
  • Magnification, the factor by which an optical system enlarges an image
  • Optical power, the degree to which a lens converges or diverges light
  • Power (physics), the rate at which work is performed or energy is convert
   

Charge

How to convert electron charge to coulombs

1C = 6.24150975·10¹⁸e

or

1e = 1.60217646·10^-19C

Electron charge to coulombs conversion formula

The charge in coulombs Q_(C) is equal to the charge in electron charge Q_(e) times 1.60217646·10^-19:

Q_(C) = Q_(e) × 1.60217646·10^-19

Example

Convert 3 electron charge to coulombs:

Q_(C) = 3e × 1.60217646·10^-19= 4.8065·10^-19C

ROUND FORMULA  (ENERGY,VOLTAGE,CURRENT)