electrical power

• POWER is the rate at which energy is transferred or converted.

  • In an electrical circuit, POWER is calculated as the product of potential difference & current.
• cost is higher as more energy is used per second

  
• 19.6 = I^2 x 1.60

  • I^2 = 19.6 / 1.60
  • I = 3.5A
  • current through battery = 3.5 x 4 = 14A

  
• • Large has 5 times as many charges & only twice the mass as the compact.
  • although large has half the number of charges than high capacity, it only has third the mass