Direct Current

Direct current (abbreviated as DC) is one-directional flow of electric charge, which distinguishes it from alternating current. An electrochemical cell (Wikipedia) is an example of a device that generates direct current.

This module also features

• the Ohm’s law, which connects current to voltage and resistance,

• formulas for the electric power in resistive circuits

Links:

1. Wikipedia — Direct current

2. Wikipedia — Electric power — Resistive circuits

Contents:

• Conductance
  • Electrical conductance is inverse resistance
    • conductance
    • resistance
    • law
• Resistance
  • Resistivity of serial resistors
    • total_resistance
    • resistance
    • law
• Current is voltage over resistance
  • current
  • voltage
  • resistance
  • law
• Power via current and resistance
  • power
  • current
  • resistance
  • law
• Power via voltage and current
  • power
  • current
  • voltage
  • law
• Power via voltage and resistance
  • power
  • voltage
  • resistance
  • law