Electricity

Zaishary Reynoso P. 03 11/13/2015

Power

Definition

  • The electric power in watts associated with a complete electric circuit or a circuit component represents the rate at which energy is converted from the electrical energy of the moving charges to some other form, e.g., heat, mechanical energy, or energy stored in electric fields or magnetic fields.
Comparing and Constranting
  • Electric power represents the speed and the electrical resistance is a measure of the difficulty of conductor.

Example of real life

  • Solar, hydro, wind, nuclear.

Resistance

Definition

  • The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
Comparing and Constranting
  • Electric power represents the speed and the electrical resistance is a measure of the difficulty of conductor.

Example of real life

  • Ceramics, bakelite, wood (paper), plastic.

Voltage

Definition

  • An electromotive force or potential difference expressed in volts.
Comparing and Constranting


  • Voltage is the cause and current is its effect. Voltage can exist without current.
  • Current is the effect (voltage being the cause). Current cannot flow without voltage.
Example of real life
  • A battery, has a potential difference at the poles, is produced by an internal chemical reaction that separates the electrons toward one pole and leaving the other uncharged and is positive in the absence of negative charge.

Current

Definition

  • An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire.
Comparing and Constranting
  • Current is the effect (voltage being the cause). Current cannot flow without voltage.
  • Voltage is the cause and current is its effect. Voltage can exist without current.
Example of real life
  • A TV, iron, etc.