9.3 Energy and Cost

Cards (16)

  • Power is relationship between voltage and current
  • Formula for finding Power: P = VI
  • P = Power: Watt, W
  • Energy is the relationship between power and time
  • Formula for Energy: E= PT
  • E= Energy: Kilowatt-hour, kWh
  • T= Time: Hour, H (If time is in minutes turn it into hours)
  • 1 kW = 1000 W
  • Cost is relationship between energy and rate
  • Formula for finding cost: C = RE
  • R = Rate: ¢ or $/kWh
  • C = Cost: ¢ or $
  • Percent Efficiency is important to know because it can help save money on electricity bill
  • Power Triangle
    A) P
    B) I
    C) V
  • Energy Triangle
    A) E
    B) P
    C) T
  • Cost
    A) C
    B) E
    C) Rate