click below
click below
Normal Size Small Size show me how
P1 3
Electrical Energy
Question | Answer |
---|---|
What defines the power of an appliance? | The rate at which it transfers energy |
What is the relationship between time, power and energy? | Power=Energy/Time |
What is the unit of power? | Watt (W) |
What is the unit of energy? | Joule (J) |
What is the relationship between Watts and Joules? | 1 Watt = 1J/s |
What is a kWh? | A unit of energy when a kW appliance has been left running for an hour? |
Why has the production and sale of filament bulbs been banned? | They are very inefficient and therefore waste a lot of energy. |
What is payback time? | The time taken for the savings of an appliance to pay back the original investment. |